82 lines
6.4 KiB
Markdown
82 lines
6.4 KiB
Markdown
# Server code
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## Database model typing
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Sequelize models contain optional fields corresponding to table joins.
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For example, `VideoModel` has a `VideoChannel?: VideoChannelModel` field. It can be filled if the SQL query joined with the `videoChannel` table or empty if not.
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It can be difficult in TypeScript to understand if a function argument expects associations to be filled or not.
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To improve clarity and reduce bugs, PeerTube defines multiple versions of a database model depending on its associations in `server/core/types/models/`.
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These models start with `M` and by default do not include any association. `MVideo` for example corresponds to `VideoModel` without any association, where `VideoChannel` attribute doesn't exist. On the other hand, `MVideoWithChannel` is a `MVideo` that has a `VideoChannel` field. This way, a function that accepts `video: MVideoWithChannel` argument expects a video with channel populated. Main PeerTube code should never use `...Model` (`VideoModel`) database type, but always `M...` instead (`MVideo`, `MVideoChannel` etc).
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## Add a new feature walkthrough
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Here's a list of all the parts of the server to update if you want to add a new feature (new API REST endpoints for example) to the PeerTube server.
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Some of these may be optional (for example your new endpoint may not need to send notifications) but this guide tries to be exhaustive.
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* Configuration:
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- Add you new configuration key in `config/default.yaml` and `config/production.yaml`
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- If you configuration needs to be different in dev or tests environments, also update `config/dev.yaml` and `config/test.yaml`
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- Load your configuration in `server/core/initializers/config.ts`
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- Check new configuration keys are set in `server/core/initializers/checker-before-init.ts`
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- You can also ensure configuration consistency in `server/core/initializers/checker-after-init.ts`
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- If you want your configuration to be available in the client:
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+ Add your field in `packages/models/src/server/core/server-config.model.ts`
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+ Update `server/core/lib/server-config-manager.ts` to include your new configuration
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- If you want your configuration to be updatable by the web admin in the client:
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+ Add your field in `packages/models/src/server/core/custom-config.model.ts`
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+ Add the configuration to the config object in the `server/core/controllers/api/config.ts` controller
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* Controllers:
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- Create the controller file and fill it with your REST API routes
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- Import and use your controller in the parent controller
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* Middlewares:
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- Create your validator middleware in `server/core/middlewares/validators` that will be used by your controllers
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- Add your new middleware file `server/core/middlewares/validators/index.ts` so it's easier to import
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- Create the entry in `server/core/types/express.d.ts` to attach the database model loaded by your middleware to the express response
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* Validators:
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- Create your validators that will be used by your middlewares in `server/core/helpers/custom-validators`
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* Typescript models:
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- Create the API models (request parameters or response) in `packages/models`
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- Add your models in `index.ts` of current directory to facilitate the imports
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* Sequelize model (BDD):
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- If you need to create a new table:
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+ Create the Sequelize model in `server/core/models/`:
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* Create the `@Column`
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* Add some indexes if you need
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* Create static methods to load a specific from the database `loadBy...`
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* Create static methods to load a list of models from the database `listBy...`
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* Create the instance method `toFormattedJSON` that creates the JSON to send to the REST API from the model
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+ Add your new Sequelize model to `server/core/initializers/database.ts`
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+ Create a new file in `server/core/types` to define multiple versions of your Sequelize model depending on database associations
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+ Add this new file to `server/core/types/*/index.ts` to facilitate the imports
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+ Create database migrations:
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* Create the migration file in `server/core/initializers/migrations` using raw SQL (copy the same SQL query as at PeerTube startup)
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* Update `LAST_MIGRATION_VERSION` in `server/core/initializers/constants.ts`
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- If updating database schema (adding/removing/renaming a column):
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+ Update the sequelize models in `server/core/models/`
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+ Add migrations:
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* Create the migration file in `initializers/migrations` using Sequelize Query Interface (`.addColumn`, `.dropTable`, `.changeColumn`)
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* Update `LAST_MIGRATION_VERSION` in `server/core/initializers/constants.ts`
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* Notifications:
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- Create the new notification model in `packages/models/src/users/user-notification.model.ts`
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- Create the notification logic in `server/core/lib/notifier/shared`:
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+ Email subject has a common prefix (defined by the admin in PeerTube configuration)
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- Add your notification to `server/core/lib/notifier/notifier.ts`
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- Create the email template in `server/core/lib/emails`:
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+ A text version is automatically generated from the HTML
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+ The template usually extends `../common/grettings` that already says "Hi" and "Cheers". You just have to write the title and the content blocks that will be inserted in the appropriate places in the HTML template
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- If you need to associate a new table with `userNotification`:
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+ Associate the new table in `UserNotificationModel` (don't forget the index)
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+ Add the object property in the API model definition (`packages/models/src/users/user-notification.model.ts`)
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+ Add the object in `UserNotificationModel.toFormattedJSON`
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+ Handle this new notification type in client (`UserNotificationsComponent`)
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+ Handle the new object property in client model (`UserNotification`)
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* Tests:
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- Create your command class in `packages/server-commands/` that will wrap HTTP requests to your new endpoint
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- Add your command file in `index.ts` of current directory
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- Instantiate your command class in `packages/server-commands/src/server/core.ts`
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- Create your test file in `server/core/tests/api/check-params` to test middleware validators/authentification/user rights (offensive tests)
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- Add it to `server/core/tests/api/check-params/index.ts`
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- Create your test file in `server/core/tests/api` to test your new endpoints
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- Add it to `index.ts` of current directory
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- Add your notification test in `server/core/tests/api/notifications`
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* Update REST API documentation in `support/doc/api/openapi.yaml`
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