openapi: 3.0.3
info:
  title: Model CRUD Example Service
  version: "1.0.0"
  description: OpenAPI-first CRUD service with Pydantic models.

paths:
  /items:
    get:
      operationId: list_items
      responses:
        "200":
          description: List of items
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: "#/components/schemas/Item"

    post:
      operationId: create_item
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/ItemCreate"
      responses:
        "201":
          description: Item created
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Item"

  /items/{item_id}:
    get:
      operationId: get_item
      parameters:
        - name: item_id
          in: path
          required: true
          schema:
            type: integer
      responses:
        "200":
          description: Item found
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Item"
        "404":
          description: Item not found

    put:
      operationId: update_item
      parameters:
        - name: item_id
          in: path
          required: true
          schema:
            type: integer
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/ItemCreate"
      responses:
        "200":
          description: Item updated
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Item"
        "404":
          description: Item not found

    delete:
      operationId: delete_item
      parameters:
        - name: item_id
          in: path
          required: true
          schema:
            type: integer
      responses:
        "204":
          description: Item deleted
        "404":
          description: Item not found

components:
  schemas:
    Item:
      type: object
      required: [id, name, price]
      properties:
        id:
          type: integer
        name:
          type: string
        price:
          type: number
          format: float

    ItemCreate:
      type: object
      required: [name, price]
      properties:
        name:
          type: string
        price:
          type: number
          format: float