Bernard Siebens
19b92d61f7
- Introduce a comprehensive architecture document outlining the app's domain model, design principles, and shared conventions. - Establish the foundation for multi-tenancy and tenant scoping via `Club` as the tenant root and `ClubScopedModel`. - Detail the decomposition of the app into planned sub-apps and their responsibilities. - Define model structure, relationships, and access control mechanisms (RBAC) through `ClubRole` and service-layer authorization. - Provide a roadmap for tenant-aware features: seasons, rosters, events, shop, and dynamic forms.
721 lines
39 KiB
Markdown
721 lines
39 KiB
Markdown
# ClubManager — Model & Domain Architecture
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Baseline reference for implementing the domain models. This describes the **intended
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shape** of the data model: what exists today, what is planned, and the conventions every
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app should follow. It is a living document — update it when the model changes.
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> **Tenancy: multi-tenant (row-based / shared-schema).** ClubManager is designed as a
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> **multi-tenant platform** — one deployment serves many clubs, with **`Club` as the tenant
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> root**. Isolation is **row-based**: a shared database and schema where every club-owned
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> row carries a `club` FK (via `ClubScopedModel`), and *all* access is scoped to the
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> current tenant. The mechanics — tenant resolution, scoping manager, per-club uniqueness —
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> are specified in **§2.4**.
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>
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> ⚠️ **This supersedes `CLAUDE.md`**, which currently states the app is "deliberately *not*
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> multi-tenant … there is no `club_id` tenancy." That guidance and the project memory are
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> now **out of date** and must be updated to match this document — see the **banner at the
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> foot of this file**. Where the two disagree, this architecture is the intended direction.
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---
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## 1. App decomposition
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The `isort` `known-first-party` roadmap lists nine apps. The build split the original
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`accounts` app into `authentication` + `club`. Per the decisions in §7, the people models
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(`Member`, `Family`) **move out of `authentication` into a dedicated `members` app**, and
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two apps (`formbuilder`, `shop`) are added **beyond the original roadmap** — add all new
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labels to `known-first-party` in `pyproject.toml` when they land. The target decomposition:
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| App | Status | Responsibility | Models |
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|------------------|--------------|-----------------------------------------------------------|--------|
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| `authentication` | **built** | Login identity + tenancy/role services (global, cross-club) | `User` |
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| `members` | **planned** | People: person records, families (extract from `authentication`) | `Member`, `Family`, `FamilyMembership` |
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| `club` | **built** | Tenant root, **season**, season-scoped affiliation, club roles | `Club`, `Season` *(planned)*, `ClubMembership`, `ClubRole` *(planned)* |
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| `teams` | planned | Teams and season rosters | `Team`, `TeamMembership`, `StaffAssignment` |
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| `events` | planned | Training / matches / social events + attendance | `Event`, `Attendance` |
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| `news` | planned | Editorial news for the public site | `Article`, `Category` |
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| `pages` | planned | Flat CMS pages for the public site | `Page` |
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| `home` | planned | Homepage composition / featured content | `HomeConfig` (per-club) or config-only |
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| `formbuilder` | planned | Admin-defined dynamic forms + submissions + reporting | `Form`, `Field`, `Submission`, `Answer` |
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| `shop` | planned | Cart-like shop, orders, payments, PDF invoices | `Product`, `Cart`, `CartItem`, `Order`, `OrderLine`, `Payment`, `Invoice` |
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| `search` | planned | Site search (likely no models; index/config only) | — |
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**`User` stays global** (one login identity across the whole platform); everything else
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that belongs to a club is tenant-scoped (§2.4). This is why `Member` — a *person within a
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club* — lives in its own app and carries a `club` FK, while `User` does not.
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**Open decision (§7):** whether to migrate `Member`/`Family` out of `authentication` into
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a dedicated `members` app. Recommendation: keep them in `authentication` for now; revisit
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only if the app grows unwieldy. The roadmap `members` name is reserved either way.
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---
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## 2. Shared conventions
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These are already established in code — every new model follows them.
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- **UUID primary keys.** Inherit `clubmanager.base.UUIDModel` (`id = UUIDField(default=uuid4)`).
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Never expose sequential integer PKs.
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- **`ClubScopedModel`** (`clubmanager.base`) adds the tenant `club` FK
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(`related_name="%(class)ss"`) and, under multi-tenancy, a tenant-aware manager + auto
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club-stamping `save()` (§2.4). **Every aggregate-root model inherits it**; leaf rows
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reachable only via a scoped parent (e.g. `Attendance` via `Event`) may inherit scope from
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the parent, though denormalising `club` onto them is recommended (§2.4).
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- **i18n everywhere.** Every field gets a `gettext_lazy` verbose name; every model sets
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`verbose_name` / `verbose_name_plural` and a sensible `Meta.ordering`. `TextChoices`
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labels are translated too.
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- **`__str__` on every model**, human-readable.
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- **Enumerations** use nested `models.TextChoices` (see `FamilyMembership.FamilyRole`).
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- **Phone numbers** use `PhoneNumberField` (from `django-phonenumber-field`), nullable.
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- **Through models** for many-to-many relationships that carry data (role, jersey number,
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attendance status) — never a bare `ManyToManyField` when the link has attributes.
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- **Business logic in `services/`**, not fat models or views (see
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`authentication/services/member_csv_importer.py`). Management commands are thin wrappers
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over services (see `import_members_csv`).
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- **Migrations are generated, not hand-edited** (ruff-excluded).
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### Naming & relations
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- `related_name` is explicit and plural on the "many" side, chosen to read naturally from
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the parent (`club.members`, `family.memberships`, `member.family_memberships`).
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- Deletion policy is deliberate per FK: `CASCADE` for owned children,
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`SET_NULL`(+`null=True`) where the child should survive its parent (e.g.
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`Member.user`), `PROTECT` for references that must not silently disappear (planned:
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`Season` on rosters/events — see §5).
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### 2.4 Multi-tenancy (row-based, shared schema)
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`Club` is the **tenant root**. One deployment, one database, one schema; tenants are
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separated by a `club` FK on every owned row and by disciplined scoping of every query.
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This is the lightest multi-tenancy model and matches the existing `ClubScopedModel`
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scaffolding — no Postgres schemas, no per-tenant databases, no `django-tenants`.
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**What gets a `club` FK.** Every *aggregate root* inherits `ClubScopedModel` and so carries
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`club` (`Member`, `Family`, `Season`, `Team`, `Event`, `ClubRole`, `Article`, `Category`,
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`Page`, `Form`, `Product`, `Cart`, `Order`, `Invoice`, …). Leaf rows reachable only through
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a scoped parent (`Answer`→`Submission`, `OrderLine`/`Payment`→`Order`, `CartItem`→`Cart`,
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`Attendance`→`Event`, `TeamMembership`/`StaffAssignment`→`Team`) may inherit scope via the
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parent — but **denormalising `club` onto them too is recommended** for leak-proof filtering
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and DB-level constraints. `User` is the **only** global identity model; it has no `club`.
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**People vs. logins under tenancy.** A `User` is one platform-wide login that may belong to
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several clubs; a `Member` is that person *within one club*. So:
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- `Member.user` becomes a **`ForeignKey`** (not `OneToOneField`) — one user → many members
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(at most one per club): `unique_together (club, user)`.
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- `User.get_full_name()` can no longer assume a single member; resolve the member **for the
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current club** (via the tenant context below), falling back to email.
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**Tenant resolution → `request.club`.** A `ClubTenantMiddleware` resolves the active club
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per request (recommended: **subdomain**, `ajax-united.clubmanager.app`; path-prefix
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`/c/<slug>/` is the alternative) and stores it on `request.club` *and* in a context
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variable so non-request code (services, management commands) can read it:
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```
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# clubmanager/tenancy.py
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from contextvars import ContextVar
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_current_club: ContextVar = ContextVar("current_club", default=None)
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def set_current_club(club): _current_club.set(club)
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def get_current_club(): return _current_club.get()
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def require_current_club(): # raises if unset — use in write paths
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club = _current_club.get()
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if club is None: raise RuntimeError("No active club in context")
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return club
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class ClubTenantMiddleware: # resolves subdomain -> Club, sets both
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... # request.club = club; set_current_club(club)
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```
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**Scoping manager.** `ClubScopedModel` gets a tenant-aware manager so day-to-day queries
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can't accidentally cross tenants:
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```
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class TenantQuerySet(models.QuerySet):
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def for_club(self, club): return self.filter(club=club)
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def current(self): return self.filter(club=require_current_club())
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class ClubScopedModel(UUIDModel):
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club = models.ForeignKey("club.Club", on_delete=models.CASCADE, related_name="%(class)ss")
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objects = TenantQuerySet.as_manager()
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def save(self, *args, **kwargs): # auto-stamp club from context if unset
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if self.club_id is None: self.club = require_current_club()
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super().save(*args, **kwargs)
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class Meta: abstract = True
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```
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Prefer **explicit** `.for_club(club)` / `.current()` in views and services over a fully
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automatic global filter — auto-filtering via context state is convenient but hides tenant
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boundaries and bites hard in shells, tasks, and tests. Keep scoping visible.
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**Per-club uniqueness.** Every constraint that was globally unique becomes **unique per
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club**. Concretely: `Season.name`, all public `slug`s (`Article`, `Page`, `Form`,
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`Product`), `Team (season, name)`, jersey numbers `(team, jersey_number)`, and the
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human-readable counters `Order.number` / `Invoice.number` are scoped by / allocated per
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club. A bare `unique=True` on a tenant model is almost always a bug — use
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`UniqueConstraint(fields=["club", …])`.
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**Cross-cutting consequences (checklist for every feature):**
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- Admin: register a `club` list-filter and scope `get_queryset` for non-superusers.
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- Roles are **per-club** — see §3 (global Django Groups don't fit; use `ClubRole`).
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- Sequential numbers (invoices) allocate per club inside a transaction — never `count()+1`.
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- Tests must set a current club (a `with_club(club)` context-manager helper).
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- Config: wildcard host + CSRF for subdomains; see §8.
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---
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## 3. Roles & access control (RBAC)
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Authorization is **service-layer, and per-club** (§2.4). Because roles differ per tenant —
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a user can be a treasurer at club A and merely a member at club B — global Django `Group`s
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(which are platform-wide) **do not fit**. Roles are stored as tenant-scoped `ClubRole` rows
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and *all* permission decisions go through a single service module; no `django-guardian`,
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no per-club Group hacks. Django's own permission framework is retained **only** for the
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platform-operator layer (`is_staff` / `is_superuser` in Django admin).
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### 3.1 Two layers
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1. **Platform operators** — `User.is_superuser` / `is_staff`. Global, cross-club; run the
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Django admin, manage the tenant list. Not a club role.
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2. **Club roles** — a member's standing *within one club*, stored per tenant. Two kinds:
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- **Club-wide roles** → `ClubRole` rows (below).
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- **Object-scoped roles** → derived from the domain graph, no extra rows:
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- Coach / manager **of a specific team** → `StaffAssignment(team, member, role)`.
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- Parent / guardian **of a specific member** → `FamilyMembership` + the family graph.
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- Purchaser vs. beneficiary → `Order`/`OrderLine` + `ClubMembership`.
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### 3.2 `ClubRole` — club-wide role assignments *(app: `club`)*
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```
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ClubRole(ClubScopedModel) # ClubScopedModel -> carries `club` (§2.4)
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member FK Member (CASCADE, related_name="roles")
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role CharField (TextChoices: MEMBER | EDITOR | TREASURER | BOARD)
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Meta: unique_together (club, member, role)
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```
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| Role | Grants (representative) |
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|-------------|------------------------------------------------------------------------------|
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| *Public* | Anonymous — no row; read-only public site of that club. |
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| `MEMBER` | View own + family data, own rosters/attendance, own orders/invoices, submit member-only forms. |
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| `EDITOR` | Manage that club's `news`, `pages`, `formbuilder` content. |
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| `TREASURER` | Manage that club's `shop`: products, orders, payments, issue/void invoices. |
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| `BOARD` | Full management of that club: members, roles, all of the above. |
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`COACH` / `TEAM_MANAGER` are deliberately **not** `ClubRole`s — being a coach is always
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*of a team*, so it lives on `StaffAssignment` (§5.3). "Is this user a coach at this club?"
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= "do they have any `StaffAssignment` on a team in this club?".
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### 3.3 The permission service
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One module — `club/services/access.py` (or `authentication/services/access.py`) — answers
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every authorization question, always taking the club/object as an argument:
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```
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has_club_role(user, club, role) -> bool # ClubRole lookup
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roles_in_club(user, club) -> set[str] # incl. derived COACH/MANAGER
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teams_managed_by(user, club) -> QuerySet[Team]
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members_visible_to(user, club) -> QuerySet[Member] # self + family + managed teams
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can_edit_event(user, event) -> bool
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can_manage_shop(user, club) -> bool # TREASURER or BOARD
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```
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Views, admin, and templates call these — never re-derive access inline. Each helper scopes
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to the given club (§2.4), so a user's powers in club A never leak into club B.
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### 3.4 Keeping roles in sync with domain state
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`ClubRole` membership is **reconciled from domain facts**, not hand-assigned:
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- An **active** `ClubMembership` for the club's current season → grant the `MEMBER` role;
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a lapsed one → revoke. (Season-scoped membership: §5.1.)
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- A `StaffAssignment` needs no `ClubRole` — coach status is derived (§3.2).
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Implement as `club/services/access.py::reconcile_roles(user, club)`, invoked on the state
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changes that matter (membership activation/lapse), so authorization never drifts from data.
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---
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## 4. Built models (as-is, + planned tenancy changes)
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### `authentication`
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**`User`** — custom auth model, email is the login (`USERNAME_FIELD = "email"`, no
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username). UUID PK. `objects = UserManager()` (email-based `create_user` /
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`create_superuser`). **Stays global — the one model with no `club` FK** (§2.4). Because a
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user may belong to several clubs, `get_full_name` / `get_short_name` resolve the `Member`
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**for the current club** (via tenant context), falling back to email — they can no longer
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assume a single member.
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### `members` *(planned — extract from `authentication`)*
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`Member`, `Family`, `FamilyMembership` **move here** and become tenant-scoped
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(`ClubScopedModel`).
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**`Member`** — a *person within one club*. `user` becomes a **`ForeignKey`** (was
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`OneToOneField`), still nullable (`on_delete=SET_NULL`), so one login maps to one member
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*per club* (`unique_together (club, user)`) and members can exist without logins (children,
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imports). Holds name, DOB, contact `email`/`phone`/`emergency_phone`. `contact_email`
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prefers the member's own email, else the login email. `guardians` returns parent/guardian
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members reachable through shared families (all within the same club).
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**`Family`** + **`FamilyMembership`** — households, tenant-scoped. `FamilyMembership` carries
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a `FamilyRole` (`parent` / `child` / `guardian` / `other`), `unique_together (family,
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member)`; `Family.guardians` / `Family.children` are role-derived querysets. Powers the
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"parents see their children's data" object-scope (§3.1).
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### `club`
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**`Club`** — **the tenant root** (§2.4). Currently just `name`; extend with `slug` (unique,
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drives subdomain/path resolution), contact, and branding. Provide `Club.objects.current()`
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and resolve it in middleware — never hardcode a PK.
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**`ClubMembership`** — links a `Member` to the `Club` with a `license` string. **Being made
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season-scoped** (§5.1): it gains a `season` FK and sign-up / fee-status fields, so each row
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is one member's affiliation for one season (`unique_together (club, member, season)`). This
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is the record the `MEMBER` role and shop fulfilment key off of (§3.4, §5.7).
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---
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## 5. Planned models (design)
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Field lists below are **sketches** to implement against, not final migrations.
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All sketches below are tenant-scoped: aggregate roots inherit **`ClubScopedModel`** (the
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`club` FK is shown implicitly and every listed `unique_together` is *within a club*, §2.4).
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### 5.1 `Season` — the central organizing concept *(app: `club`)*
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Everything time-bound hangs off a season. Rosters, events, and attendance are
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**season-scoped via FK** — never global state. Seasons are **per club** — each club runs
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its own.
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```
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Season(ClubScopedModel) # -> carries `club`
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name CharField # e.g. "2025–2026"
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start_date DateField
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end_date DateField
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is_current BooleanField # exactly one true PER CLUB; enforce in save()/service
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Meta: unique_together (club, name); ordering = ["-start_date"]; get_latest_by = "start_date"
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```
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- Provide `Season.objects.current()` (scoped to the current club, §2.4) rather than
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scattering `is_current=True` filters.
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- Referenced by `Team`, `Event`, and `ClubMembership`. Use `on_delete=PROTECT` on those
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FKs — deleting a season with data should be blocked.
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**Season-scoped `ClubMembership`** (evolution of the built model, §4):
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```
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ClubMembership(ClubScopedModel) # -> carries `club`
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member FK Member (CASCADE, related_name="club_memberships")
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season FK Season (PROTECT, related_name="memberships")
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license CharField (blank) # federation license for that season
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status CharField (TextChoices: pending | active | lapsed | cancelled)
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fee_status CharField (TextChoices: unpaid | partial | paid | waived)
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signed_up_at DateTimeField (null) # when the member registered for the season
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activated_at DateTimeField (null) # when membership became active (usually on payment)
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Meta: unique_together (club, member, season); ordering = ["-season__start_date", ...]
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```
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- One row per member **per season** — sign-up and fee payment are tracked independently
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each season. `unique_together` moves from `(club, member)` → `(club, member, season)`
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(a data migration must backfill existing rows with the current season).
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- `fee_status` is the **source of truth for whether dues are paid**; it is driven by the
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shop (§5.7) — a paid membership `Order` flips `fee_status → paid` and `status → active`.
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Keep it denormalized here (fast to query "who hasn't paid") but only mutate it through a
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service that reconciles against `Payment`s, never by hand.
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- `status = active` (for the club's current season) is the fact that grants the member's
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user the `MEMBER` `ClubRole` (§3.4).
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### 5.2 `teams`
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```
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Team(ClubScopedModel) # -> carries `club`
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season FK Season (PROTECT, related_name="teams")
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name CharField # "U12 A"
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age_group CharField (choices, optional)
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Meta: unique_together (season, name); ordering = ["season", "name"]
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TeamMembership(UUIDModel) # roster entry — through model, club/season implied by team
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team FK Team (CASCADE, related_name="roster")
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member FK Member (CASCADE, related_name="team_memberships")
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position CharField (TextChoices, optional)
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jersey_number PositiveSmallIntegerField (null=True)
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Meta: unique_together (team, member);
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UniqueConstraint(team, jersey_number) WHERE jersey_number IS NOT NULL
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StaffAssignment(UUIDModel) # coach / manager on a team, per season
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team FK Team (CASCADE, related_name="staff")
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member FK Member (CASCADE, related_name="staff_assignments")
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role CharField (TextChoices: coach | assistant | manager)
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Meta: unique_together (team, member, role)
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```
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A `Member` plays on one *or more* `Team`s per season, each with its own position + jersey
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number — modeled by `TeamMembership`, exactly matching the domain note.
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- **Jersey numbers are unique within a team** (decision §7 #4): a partial
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`UniqueConstraint(fields=["team", "jersey_number"], condition=~Q(jersey_number=None))`.
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Nullable so a roster spot can exist before a number is assigned; `NULL`s are exempted so
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several unnumbered entries don't collide. `team` already implies club + season, so no
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extra tenancy field is needed on the constraint.
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- `StaffAssignment` drives the coach/manager object-scope (§3.1–3.2) — it *is* the "is a
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||
coach of this team" fact; no `ClubRole` mirrors it.
|
||
|
||
### 5.3 `events`
|
||
|
||
```
|
||
Event(ClubScopedModel) # -> carries `club`
|
||
season FK Season (PROTECT, related_name="events")
|
||
team FK Team (SET_NULL, null=True, related_name="events") # null = club-wide
|
||
kind CharField (TextChoices: training | match | tournament | social | meeting)
|
||
title CharField
|
||
location CharField (blank)
|
||
starts_at DateTimeField
|
||
ends_at DateTimeField (null=True)
|
||
opponent CharField (blank) # for matches
|
||
Meta: ordering = ["starts_at"]
|
||
|
||
Attendance(UUIDModel) # through model Event <-> Member
|
||
event FK Event (CASCADE, related_name="attendances")
|
||
member FK Member (CASCADE, related_name="attendances")
|
||
status CharField (TextChoices: present | absent | excused | maybe)
|
||
note CharField (blank)
|
||
Meta: unique_together (event, member)
|
||
```
|
||
|
||
`Event.season` is redundant with `team.season` when a team is set, but events can be
|
||
club-wide (`team=None`), so `season` stays a first-class FK. Keep it consistent in a
|
||
service/clean().
|
||
|
||
### 5.4 `news`, `pages`, `home` (public site / editorial)
|
||
|
||
```
|
||
news.Article(ClubScopedModel) # -> carries `club`
|
||
title, slug (SlugField), body (TextField)
|
||
excerpt (blank), cover_image (ImageField, null)
|
||
author FK members.Member (SET_NULL, null, related_name="articles")
|
||
category FK news.Category (SET_NULL, null)
|
||
is_published BooleanField; published_at DateTimeField (null)
|
||
Meta: unique_together (club, slug); ordering = ["-published_at"]
|
||
|
||
news.Category(ClubScopedModel): name, slug # Meta: unique_together (club, slug)
|
||
|
||
pages.Page(ClubScopedModel) # flat CMS pages: "About", "Contact", ...
|
||
title, slug, body (TextField)
|
||
is_published BooleanField; menu_order (int)
|
||
Meta: unique_together (club, slug)
|
||
# If nested navigation is needed, add: parent = FK self (SET_NULL, null)
|
||
|
||
home.HomeConfig(ClubScopedModel) # one row PER CLUB: featured articles/teams, hero content
|
||
# (unique_together (club,) — one per tenant). May be config-only.
|
||
```
|
||
|
||
- **`Article.author` links to `members.Member`** (decision §7 #5) — attribution is to a
|
||
club person, not a raw login; `SET_NULL` so deleting a member doesn't erase their posts.
|
||
- `slug`s back clean public URLs and feed `search`; they are **unique per club** (§2.4), so
|
||
two clubs can both have `/news/season-kickoff`. Resolve within the request's club.
|
||
- `cover_image` / hero images use `ImageField` → **media storage must be configured** (§8).
|
||
If page/news trees grow, consider a tree library later — start flat.
|
||
|
||
### 5.5 `search`
|
||
|
||
Likely **no models** — a search view over `Article`, `Page`, `Team`, `Event`. If moving to
|
||
Postgres full-text or an external index, add config here, not domain tables.
|
||
|
||
### 5.6 `formbuilder` — dynamic forms *(new app)*
|
||
|
||
Admins/editors define forms with a **variable number of fields** at runtime; submissions
|
||
are stored so they can be **reported on** later. This uses the classic EAV (entity-
|
||
attribute-value) shape with **normalized `Answer` rows as the single source of truth**
|
||
(decision §7 #9) — one row per answered field, with a JSON `value` to stay flexible across
|
||
field types. No parallel JSON blob on the submission — reporting reads `Answer`s directly.
|
||
|
||
```
|
||
Form(ClubScopedModel) # -> carries `club`
|
||
title, slug, description (blank)
|
||
is_active BooleanField
|
||
login_required BooleanField # members-only vs public submission
|
||
opens_at / closes_at DateTimeField (null) # optional submission window
|
||
max_submissions_per_user PositiveInteger (null) # null = unlimited
|
||
Meta: unique_together (club, slug); ordering = ["title"]
|
||
|
||
Field(UUIDModel) # a form's field definition (club implied by form)
|
||
form FK Form (CASCADE, related_name="fields")
|
||
key SlugField # stable machine name, unique per form (for reporting)
|
||
label CharField
|
||
field_type CharField (TextChoices: text | textarea | number | email | date |
|
||
choice | multichoice | checkbox | file)
|
||
required BooleanField
|
||
help_text CharField (blank)
|
||
order PositiveSmallIntegerField
|
||
is_active BooleanField (default=True) # soft-retire instead of deleting (see below)
|
||
options JSONField (default=list) # choices for choice/multichoice: [{value,label}]
|
||
Meta: unique_together (form, key); ordering = ["form", "order"]
|
||
|
||
Submission(UUIDModel) # container only — no answer data on it
|
||
form FK Form (CASCADE, related_name="submissions")
|
||
member FK Member (SET_NULL, null) # set when submitter is logged in
|
||
submitted_at DateTimeField
|
||
Meta: ordering = ["-submitted_at"]
|
||
|
||
Answer(UUIDModel) # CANONICAL store — one per answered field
|
||
submission FK Submission (CASCADE, related_name="answers")
|
||
field FK Field (PROTECT, related_name="answers")
|
||
value JSONField # scalar, list (multichoice), or file ref
|
||
Meta: unique_together (submission, field)
|
||
```
|
||
|
||
Design notes:
|
||
- **`Answer` is canonical; there is no denormalized JSON snapshot.** A submission's values
|
||
are always read/aggregated from its `Answer` rows. The submit service
|
||
(`formbuilder/services/submit.py`) validates the dynamic form and writes the `Submission`
|
||
+ its `Answer`s in one transaction. (If a flat per-submission view ever becomes a
|
||
hotspot, add a *derived, rebuildable* cache later — but the model stays the source.)
|
||
- **`Field.key` is immutable once submissions exist** — reporting joins on it. Deleting a
|
||
field with answers is blocked (`PROTECT`); **retire via `is_active=False`** instead.
|
||
- **Reporting** = a service/view producing per-field aggregates (counts per choice,
|
||
numeric averages, response rate) plus a wide CSV/Excel export (one column per field,
|
||
one row per submission). No extra model needed; add a saved-report model later only if
|
||
users need to persist report definitions.
|
||
- Rendering a `Form` to a Django form (and validating a submission) is a service concern —
|
||
build the form class dynamically from `Field` rows; don't hand-write form classes.
|
||
|
||
### 5.7 `shop` — cart, orders, payments & PDF invoices *(new app)*
|
||
|
||
A cart-like shop where a member (or parent) "buys" products — chiefly a **season
|
||
membership** — with payment-status tracking and generated invoices. Fulfilment of a
|
||
membership product writes back to the season-scoped `ClubMembership` (§5.1).
|
||
|
||
```
|
||
Product(ClubScopedModel) # -> carries `club`
|
||
name, slug, description (blank)
|
||
kind CharField (TextChoices: membership | event_fee | merchandise | donation)
|
||
price DecimalField(max_digits=8, decimal_places=2)
|
||
season FK Season (PROTECT, null) # set for membership/event products
|
||
is_active BooleanField
|
||
Meta: unique_together (club, slug)
|
||
# membership products fulfil into a ClubMembership for the chosen season + beneficiary
|
||
|
||
Cart(ClubScopedModel) # -> carries `club`; one open cart per (club, user)
|
||
user FK User (CASCADE, related_name="carts")
|
||
status CharField (TextChoices: open | checked_out | abandoned)
|
||
Meta: UniqueConstraint(club, user) WHERE status = open
|
||
|
||
CartItem(UUIDModel) # club implied by cart
|
||
cart FK Cart (CASCADE, related_name="items")
|
||
product FK Product (PROTECT)
|
||
beneficiary FK Member (PROTECT, null) # who this membership is FOR (parent buys for child)
|
||
quantity PositiveSmallIntegerField (default=1)
|
||
unit_price DecimalField # snapshot of price at add-to-cart time
|
||
Meta: unique_together (cart, product, beneficiary)
|
||
|
||
Order(ClubScopedModel) # -> carries `club`; immutable, created at checkout
|
||
number CharField # human ref, allocated PER CLUB, e.g. "ORD-2026-00042"
|
||
purchaser FK Member (PROTECT, related_name="orders")
|
||
status CharField (TextChoices: pending | paid | partially_paid | cancelled | refunded)
|
||
total DecimalField
|
||
created_at DateTimeField
|
||
Meta: unique_together (club, number); ordering = ["-created_at"]
|
||
|
||
OrderLine(UUIDModel) # club implied by order
|
||
order FK Order (CASCADE, related_name="lines")
|
||
product FK Product (PROTECT)
|
||
beneficiary FK Member (PROTECT, null)
|
||
quantity PositiveSmallIntegerField
|
||
unit_price DecimalField # snapshot
|
||
line_total DecimalField
|
||
fulfilled_at DateTimeField (null) # when this line's ClubMembership was activated
|
||
|
||
Payment(UUIDModel) # club implied by order; an order may have several (partial)
|
||
order FK Order (CASCADE, related_name="payments")
|
||
amount DecimalField
|
||
method CharField (TextChoices: bank_transfer | cash | card | online)
|
||
status CharField (TextChoices: pending | confirmed | failed | refunded)
|
||
reference CharField (blank) # bank/gateway reference
|
||
paid_at DateTimeField (null)
|
||
|
||
Invoice(ClubScopedModel) # -> carries `club`
|
||
number CharField # sequential PER CLUB per year, e.g. "INV-2026-00042"
|
||
order OneToOneField Order (PROTECT, related_name="invoice")
|
||
issued_at DateTimeField
|
||
due_date DateField (null)
|
||
billing_snapshot JSONField # name/address frozen at issue time
|
||
pdf FileField (null) # rendered HTML->PDF, cached in PRIVATE storage (§8)
|
||
Meta: unique_together (club, number)
|
||
```
|
||
|
||
Flow & design notes:
|
||
- **Cart → checkout → order.** Checkout converts the open `Cart` into an immutable `Order`
|
||
+ `OrderLine`s, snapshotting prices (products may reprice later). The cart is marked
|
||
`checked_out`. All in one transactional service (`shop/services/checkout.py`).
|
||
- **Payment status is derived, not typed by hand.** A service sums `confirmed` `Payment`s
|
||
and sets `Order.status` (`pending` → `partially_paid` → `paid`). Online payments arrive
|
||
via a gateway webhook that creates/confirms a `Payment`; manual methods
|
||
(bank transfer/cash) are confirmed by a `TREASURER` (§3.2).
|
||
- **Fulfilment writes back to membership.** When an order (or a membership line) reaches
|
||
`paid`, a service creates/activates the `ClubMembership(member=beneficiary, season=…)`,
|
||
flips its `fee_status → paid` / `status → active`, stamps `OrderLine.fulfilled_at`, and
|
||
triggers role reconciliation (§3.4). This is the seam that ties the shop to the domain.
|
||
- **Beneficiary vs. purchaser** is first-class: a parent (`purchaser`) buys memberships for
|
||
several children (`beneficiary`) in one order. Both are `Member`s of the same club.
|
||
- **Invoice = HTML → PDF.** Render a Django template to HTML, convert with **WeasyPrint**
|
||
(see §8 for the exact dependency + native-library setup). Generate on order confirmation,
|
||
store the file on `Invoice.pdf` in **private** storage, and serve it only through a
|
||
permission-checked view (never a public media URL — invoices are tenant-private, §8).
|
||
`Invoice.number` uses a gap-free counter **per club per year** — allocate it in a
|
||
transaction/service (e.g. a `select_for_update` sequence row), not from `count()`.
|
||
- **Money = `DecimalField`**, never float. Snapshot prices onto cart items / order lines /
|
||
invoices so historical records stay correct when `Product.price` changes.
|
||
|
||
---
|
||
|
||
## 6. Entity-relationship overview
|
||
|
||
```
|
||
Club (TENANT ROOT — every model below except User carries `club`; §2.4)
|
||
└─< Season, Member, Family, Team, Event, ClubRole, Article, Page, Form, Product, Order, Invoice, …
|
||
|
||
User 1───< Member (FK, unique per club) # User is GLOBAL — no club FK
|
||
│ └───< FamilyMembership >─── Family
|
||
│ └───< ClubRole (MEMBER | EDITOR | TREASURER | BOARD)
|
||
│
|
||
├───< ClubMembership ──> Season (unique: club, member, season)
|
||
│
|
||
├───< TeamMembership >─── Team ───> Season
|
||
├───< StaffAssignment >─── Team (= "coach of this team", §3.2)
|
||
│
|
||
├───< Attendance >─── Event ───> Season
|
||
│ └───> Team (nullable)
|
||
│
|
||
├───< Submission >─── Form ───< Field (Submission ──< Answer >── Field)
|
||
│
|
||
└── (purchaser) ──< Order ───< OrderLine >── Product ──> Season
|
||
│ └──> Member (beneficiary)
|
||
├──< Payment
|
||
└─1:1─ Invoice (Cart ──< CartItem >── Product)
|
||
|
||
Season ──< Team, Event, ClubMembership, (membership/event) Product # all within one club
|
||
|
||
news.Article ──> news.Category, (author) members.Member
|
||
pages.Page (self-parent, optional)
|
||
```
|
||
|
||
Legend: `───<` one-to-many, `>───<` many-to-many via a through model. Everything under
|
||
`Club` is one tenant's data; joins never cross clubs (§2.4).
|
||
|
||
---
|
||
|
||
## 7. Decisions (resolved) & remaining questions
|
||
|
||
**Resolved** (this revision):
|
||
|
||
1. ✅ **`members` app split** — Member/Family/FamilyMembership **move to a dedicated
|
||
`members` app** (§1, §4). Migration reshuffles app labels + tables.
|
||
2. ✅ **Season-scoped `ClubMembership`** — yes (§5.1). Data migration backfills existing
|
||
rows with the current season and re-scopes `unique_together`.
|
||
3. ✅ **Full multi-tenancy** — adopt **row-based multi-tenancy**, `Club` as tenant root
|
||
(§2.4). Requires: `ClubScopedModel` on every aggregate root, `Member.user` →
|
||
`ForeignKey` (+`unique(club, user)`), tenant middleware + `clubmanager/tenancy.py`
|
||
context, tenant-aware manager, per-club uniqueness, per-club roles (§3). **Supersedes
|
||
`CLAUDE.md`.**
|
||
4. ✅ **Jersey uniqueness** — unique **within a team** via a partial `UniqueConstraint`
|
||
(`NULL`s exempt) (§5.2).
|
||
5. ✅ **`Article.author`** — links to `members.Member` (§5.4).
|
||
6. ✅ **RBAC mechanism** — **service layer**, no `django-guardian`; per-club `ClubRole`
|
||
rows + a single access service (§3). Django's own perms only for platform admin.
|
||
7. ✅ **`formbuilder` storage** — **normalized `Answer` is canonical**; no denormalized JSON
|
||
snapshot (§5.6).
|
||
|
||
Infrastructure/config for the above (media storage, dependencies + exact setup) is
|
||
specified in **§8**.
|
||
|
||
**Still open:**
|
||
|
||
- **Tenant resolution mechanism** — subdomain (recommended) vs. path-prefix `/c/<slug>/`.
|
||
Affects DNS/TLS, `ALLOWED_HOSTS`, cookies, and local dev (§8). Pick before building
|
||
`ClubTenantMiddleware`.
|
||
- **Auto-scoping vs. explicit scoping** — should the tenant manager filter *automatically*
|
||
from context, or stay explicit (`.for_club()` / `.current()`)? Doc currently recommends
|
||
**explicit** (§2.4).
|
||
- **Cross-club users** — can one person be a `BOARD` member of several clubs, switching
|
||
context in one session? The model allows it; confirm the UX (club switcher) is in scope.
|
||
- **Payment gateway** — which provider (Mollie / Stripe / none-yet)? Only needed when online
|
||
payments go live (§8).
|
||
|
||
---
|
||
|
||
## 8. Infrastructure & configuration notes
|
||
|
||
Config required by the models above — settings + dependencies to add as each app lands.
|
||
|
||
### 8.1 Media & file storage (needed for `news`, `home`, `shop`, form file fields)
|
||
|
||
Two classes of files with **different exposure**:
|
||
|
||
- **Public media** — `Article.cover_image`, home hero images. Served from the normal media
|
||
URL is fine.
|
||
- **Private, tenant-scoped files** — `Invoice.pdf` and `formbuilder` file uploads. These
|
||
**must not** be publicly reachable. Serve them only through a permission-checked Django
|
||
view (`X-Accel-Redirect`/`X-Sendfile` in prod), never a guessable public URL, and scope
|
||
access to the file's club (§2.4).
|
||
|
||
Setup:
|
||
- **Dev:** `MEDIA_ROOT`/`MEDIA_URL` on local disk; private files under a non-served path.
|
||
- **Prod:** object storage (S3-compatible) via **`django-storages`** (add to deps) with
|
||
**separate public and private buckets/backends** (Django 5.1+ `STORAGES` setting). Keep
|
||
the private backend non-public and generate signed/short-lived URLs or stream via the view.
|
||
- Organise keys by club (e.g. `club/<club_id>/invoices/…`) so tenant data is easy to
|
||
isolate, audit, and delete.
|
||
|
||
### 8.2 HTML → PDF invoices — WeasyPrint
|
||
|
||
- Add the dependency: `uv add weasyprint`.
|
||
- **Native libraries required** (WeasyPrint wraps Pango/Cairo) — install at the OS/image
|
||
level, not via pip:
|
||
- macOS (dev): `brew install pango gdk-pixbuf libffi` (Cairo/GLib come along).
|
||
- Debian/Ubuntu (CI + prod image): `apt-get install libpango-1.0-0 libpangocairo-1.0-0
|
||
libcairo2 libgdk-pixbuf-2.0-0 libffi-dev` (exact names per distro/WeasyPrint version).
|
||
- Document these in the Dockerfile/CI so PDF rendering isn't a "works on my machine" trap.
|
||
- Render a Django template → HTML string → `weasyprint.HTML(string=…).write_pdf()`; store
|
||
onto `Invoice.pdf` (private storage, §8.1). Generation is a service, ideally async/queued
|
||
if volume grows.
|
||
|
||
### 8.3 Tenancy runtime config (needed once `ClubTenantMiddleware` lands)
|
||
|
||
- **Hosts:** wildcard `ALLOWED_HOSTS` for the chosen base domain (e.g. `.clubmanager.app`)
|
||
if using subdomain resolution; add `DJANGO_ALLOWED_HOSTS` accordingly.
|
||
- **CSRF:** `CSRF_TRUSTED_ORIGINS` must cover the wildcard scheme+host set
|
||
(`https://*.clubmanager.app`).
|
||
- **Cookies:** to share login across club subdomains, set `SESSION_COOKIE_DOMAIN` /
|
||
`CSRF_COOKIE_DOMAIN` to the base domain; otherwise keep per-subdomain sessions
|
||
(decide with the "cross-club users" question in §7).
|
||
- **Local dev:** map a wildcard to localhost (e.g. `*.localhost` resolves on most systems,
|
||
or use `dnsmasq`) so subdomain resolution works without editing `/etc/hosts` per club.
|
||
- **Middleware order:** place `ClubTenantMiddleware` after `AuthenticationMiddleware`
|
||
(needs `request.user` to fall back to a user's default club when no subdomain is present).
|
||
|
||
### 8.4 Optional dependencies
|
||
|
||
- **Payment gateway** (only if online payments): provider SDK (e.g. `mollie-api-python` or
|
||
`stripe`) + webhook endpoint that creates/confirms `Payment`s (§5.7).
|
||
- **Excel export** for form reporting beyond CSV: `openpyxl`.
|
||
|
||
---
|
||
|
||
*Conventions cross-reference:* `clubmanager/base.py` (`UUIDModel`, `ClubScopedModel`),
|
||
`clubmanager/tenancy.py` (*to add* — tenant context/middleware, §2.4),
|
||
`authentication/managers.py` (`UserManager`), `authentication/services/` (service-layer
|
||
pattern).
|
||
|
||
---
|
||
|
||
> ### ⚠️ Banner: supersedes `CLAUDE.md`
|
||
>
|
||
> This architecture adopts **full multi-tenancy** (§2.4), which **directly contradicts**
|
||
> the current `CLAUDE.md` ("ClubManager is a **single-club** app … deliberately *not*
|
||
> multi-tenant — there is no `club_id` tenancy") and the project memory
|
||
> (`project_overview` — "Single-club (NOT multi-tenant)").
|
||
>
|
||
> **Action required** before/alongside implementation: update `CLAUDE.md` and the memory
|
||
> to describe ClubManager as a **multi-tenant platform (row-based, `Club` = tenant root)**.
|
||
> Until that is done, where the two disagree **this document is authoritative**.
|