227 lines
8.0 KiB
Plaintext
227 lines
8.0 KiB
Plaintext
# Backend Dev Rules (HTTP API + Model)
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This file condenses `backend/docs/dev/http_api.md` + `backend/docs/dev/model.md` into a checklist/rule format for LLMs.
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---
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## 0) Golden rules (DO / DO NOT)
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- DO follow existing module layout under `backend/app/http/<module>/`.
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- DO keep controller methods thin: parse/bind → call `services.*` → return result/error.
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- DO regenerate code after changes (routes/docs/models).
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- DO add `// @provider` above every controller/service `struct` declaration.
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- DO keep HTTP middlewares in `backend/app/middlewares/` only.
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- DO keep all `const` declarations in `backend/pkg/consts/` only (do not declare constants elsewhere).
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- DO NOT manually edit generated files:
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- `backend/app/http/**/routes.gen.go`
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- `backend/app/http/**/provider.gen.go`
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- `backend/docs/docs.go`
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- DO NOT manually write provider declarations (only `atomctl gen provider`).
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- DO NOT manually write route declarations (only `atomctl gen route`).
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- DO keep Swagger annotations consistent with actual Fiber route paths (including `:param`).
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- MUST: route path parameter placeholders MUST be `camelCase` (e.g. `:tenantCode`), never `snake_case` (e.g. `:tenant_code`).
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- MUST: when creating/generating Go `struct` definitions (DTOs/requests/responses/etc.), add detailed per-field comments describing meaning, usage scenario, and validation/usage rules (do not rely on “self-explanatory” names).
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---
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## 1) Add a new HTTP API endpoint
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### 1.1 Where code lives
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- Controllers: `backend/app/http/<module>/*.go`
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- Example module: `backend/app/http/super/tenant.go`, `backend/app/http/super/user.go`
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- DTOs: `backend/app/http/<module>/dto/*`
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- HTTP middlewares: `backend/app/middlewares/*`
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- Routes (generated): `backend/app/http/<module>/routes.gen.go`
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- Swagger output (generated): `backend/docs/swagger.yaml`, `backend/docs/swagger.json`, `backend/docs/docs.go`
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### 1.2 Controller method signatures
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- “Return data” endpoints: return `(<T>, error)`
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- Example: `(*requests.Pager, error)` for paginated list
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- “No data” endpoints: return `error`
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### 1.3 Swagger annotations (minimum set)
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Place above the handler function:
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- `@Summary`
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- `@Tags`
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- `@Accept json`
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- `@Produce json`
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- `@Param` (query/path/body as needed)
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- `@Success` for 200 responses
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- `@Router <path> [get|post|patch|delete|put]`
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- `@Bind` for parameters (see below)
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Common `@Success` patterns:
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- Paginated list: `requests.Pager{items=dto.Item}`
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- Single object: `dto.Item`
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- Array: `{array} dto.Item`
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### 1.4 Parameter binding (@Bind)
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Format:
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`@Bind <paramName> <position> [key(<key>)] [model(<field>|<type>[:<field>])]`
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Positions:
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- `path`, `query`, `body`, `header`, `cookie`, `local`, `file`
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Notes:
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- `paramName` MUST match function parameter name (case-sensitive).
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- Default key name is `paramName` ; override via `key(...)`.
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- Scalar types: `string/int/int32/int64/float32/float64/bool`.
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- Pointer types are supported (framework will handle deref for most positions).
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#### Model binding (path-only)
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Used to bind a model instance from a path value:
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- `model(id)` (recommended)
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- `model(id:int)` / `model(code:string)`
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- `model(pkg.Type:field)` or `model(pkg.Type)` (default field is `id`)
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Behavior:
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- Generated binder queries by field and returns first row as the parameter value.
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- Auto-imports field helper for query building.
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### 1.5 Generate routes + providers + swagger docs
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Run from `backend/`:
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- Generate routes: `atomctl gen route`
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- Generate providers: `atomctl gen provider`
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- Generate swagger docs: `atomctl swag init`
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### 1.6 Local verify
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- Build/run: `make run`
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- Use REST client examples: `tests/[module]/[controller].http` (extend it for new endpoints)
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### 1.7 Testing
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- Prefer existing test style under `backend/tests/e2e`.
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- Run: `make test`
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### 1.8 Module-level route group (Path + Middlewares)
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If you need to define a module HTTP middleware (applies to the module route group):
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1) Run `atomctl gen route` first.
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2) Edit `backend/app/http/<module>/routes.manual.go`:
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- Update `Path()` to return the current module route group prefix (must match the prefix used in `routes.gen.go`, e.g. `/super/v1`, `/t/:tenantCode/v1`).
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- Update `Middlewares()` return value: return a list like `[]any{r.middlewares.MiddlewareFunc1, r.middlewares.MiddlewareFunc2, ...}` (no `(...)`), where each item is `r.middlewares.<MiddlewareFunc>` referencing middleware definitions in `backend/app/middlewares`.
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---
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## 2) Add / update a DB model
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Models live in:
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- `backend/database/models/*` (generated model code + optional manual extensions)
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### 2.1 Migration → model generation workflow
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1) Create migration:
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- `atomctl migrate create alter_table` or `atomctl migrate create create_table`
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2) Edit migration:
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- No explicit `BEGIN/COMMIT` needed (framework handles).
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- Table name should be plural (e.g. `tenants`).
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- MUST: when writing migration content, every field/column MUST include a brief Chinese remark, and also include commented details for that field’s usage scenario and rules/constraints (e.g., valid range/format, default behavior, special cases).
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3) Apply migration:
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- `atomctl migrate up`
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4) Map complex field types (JSON/ARRAY/UUID/…) via transform file:
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- `backend/database/.transform.yaml` → `field_type.<table>`
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5) Generate models:
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- `atomctl gen model`
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### 2.2 Enum strategy
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- DO NOT use native DB ENUM.
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- Define enums in Go under `backend/pkg/consts/<table>.go`, example:
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```go
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// swagger:enum UserStatus
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// ENUM(pending_verify, verified, banned, )
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type UserStatus string
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```
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- Generate enum code: `atomctl gen enum`
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### 2.3 Supported field types (`gen/types/`)
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`backend/database/.transform.yaml` typically imports `go.ipao.vip/gen` so you can use `types.*` in `field_type`.
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Common types:
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- JSON: `types.JSON`, `types.JSONMap`, `types.JSONType[T]`, `types.JSONSlice[T]`
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- Array: `types.Array[T]`
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- UUID: `types.UUID`, `types.BinUUID`
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- Date/Time: `types.Date`, `types.Time`
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- Money/XML/URL/Binary: `types.Money`, `types.XML`, `types.URL`, `types.HexBytes`
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- Bit string: `types.BitString`
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- Network: `types.Inet`, `types.CIDR`, `types.MACAddr`
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- Ranges: `types.Int4Range`, `types.Int8Range`, `types.NumRange`, `types.TsRange`, `types.TstzRange`, `types.DateRange`
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- Geometry: `types.Point`, `types.Polygon`, `types.Box`, `types.Circle`, `types.Path`
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- Fulltext: `types.TSQuery`, `types.TSVector`
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- Nullable: `types.Null[T]` and aliases (requires DB NULL)
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Reference:
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- Detailed examples: `gen/types/README.md`
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### 2.4 Relationships (GORM-aligned) via `.transform.yaml`
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Define in `field_relate.<table>.<FieldName>`:
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- `relation`: `belongs_to` | `has_one` | `has_many` | `many_to_many`
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- `table`: target table
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- `pivot`: join table (many_to_many only)
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- `foreign_key`, `references`
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- `join_foreign_key`, `join_references` (many_to_many only)
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- `json`: JSON field name in API outputs
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Generator will convert snake_case columns to Go struct field names (e.g. `class_id` → `ClassID`).
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### 2.5 Extending generated models
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- Add manual methods/hooks by creating `backend/database/models/<table>.go`.
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- Keep generated files untouched ; put custom logic only in your own file(s).
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---
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## 3) Service layer injection (when adding services)
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- Services are in `backend/app/services`.
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- After creating/updating a service provider, regenerate wiring:
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- `atomctl gen service`
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- `atomctl gen provider`
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- Injection rule: provider injected dependencies MUST be `success`. do not add business-level fallbacks for injection objects nil check.
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- Service call conventions:
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- **Service-to-service (inside `services` package)**: call directly as `CamelCaseServiceStructName.Method()` (no `services.` prefix).
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- **From outside (controllers/handlers/etc.)**: call via the package entrypoint `services.CamelCaseServiceStructName.Method()`.
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---
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## 4) Quick command summary (run in `backend/`)
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- `make run` / `make build` / `make test`
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- `atomctl gen route` / `atomctl gen provider` / `atomctl swag init`
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- `atomctl migrate create ...` / `atomctl migrate up`
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- `atomctl gen model` / `atomctl gen enum` / `atomctl gen service`
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- `make init` (full refresh)
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