task_id: task_create_api_update_song
entity_id: api_update_song
generated_at: '2025-12-18T15:16:50.250397'
workflow_version: v001
target:
  type: api
  definition:
    id: api_update_song
    method: PUT
    path: /api/songs/:id
    description: Update song metadata
    request_body:
      title: string
      album_id: uuid
      genre_ids: array[uuid]
      release_date: string
      is_public: boolean
    responses:
    - status: 200
      description: Song updated
      schema:
        id: uuid
        title: string
    - status: 403
      description: Unauthorized
      schema:
        error: string
    auth:
      required: true
      owner_only: true
    depends_on_models:
    - model_song
related:
  models:
  - id: model_song
    definition: &id001
      id: model_song
      name: Song
      table_name: songs
      description: Audio track with metadata
      fields:
      - name: id
        type: uuid
        constraints:
        - primary_key
      - name: artist_id
        type: uuid
        constraints:
        - not_null
        - foreign_key
        references: artists.id
      - name: album_id
        type: uuid
        constraints:
        - nullable
        - foreign_key
        references: albums.id
      - name: title
        type: string
        constraints:
        - not_null
      - name: duration
        type: integer
        description: Duration in seconds
        constraints:
        - not_null
      - name: file_url
        type: string
        description: Cloud storage URL for audio file
        constraints:
        - not_null
      - name: file_format
        type: enum
        values:
        - mp3
        - wav
        constraints:
        - not_null
      - name: file_size
        type: integer
        description: File size in bytes
        constraints:
        - not_null
      - name: waveform_data
        type: jsonb
        description: Waveform visualization data
        constraints:
        - nullable
      - name: cover_art_url
        type: string
        constraints:
        - nullable
      - name: release_date
        type: date
        constraints:
        - nullable
      - name: play_count
        type: integer
        default: 0
      - name: is_public
        type: boolean
        default: true
      - name: track_number
        type: integer
        description: Position in album
        constraints:
        - nullable
      - name: created_at
        type: timestamp
        constraints:
        - not_null
      - name: updated_at
        type: timestamp
        constraints:
        - not_null
      relations:
      - type: belongs_to
        to: model_artist
        foreign_key: artist_id
      - type: belongs_to
        to: model_album
        foreign_key: album_id
        optional: true
      - type: has_many
        to: model_genre
        through: song_genres
        foreign_key: song_id
      - type: has_many
        to: model_playlist_song
        foreign_key: song_id
      indexes:
      - fields:
        - artist_id
      - fields:
        - album_id
      - fields:
        - release_date
      - fields:
        - play_count
      - fields:
        - is_public
      timestamps: true
  apis: []
  components: []
dependencies:
  entity_ids:
  - model_song
  definitions:
  - id: model_song
    type: model
    definition: *id001
files:
  to_create:
  - app/api/songs/id/route.ts
  reference: []
acceptance:
- criterion: PUT /api/songs/:id returns success response
  verification: curl -X PUT /api/songs/:id
- criterion: Request validation implemented
  verification: Test with invalid data
- criterion: Error responses match contract
  verification: Test error scenarios