openapi: 3.1.0
info:
  title: Workday Extend Workday Custom Objects App Configurations Custom Object Fields API
  description: APIs for defining and managing custom objects that extend Workday's data model to meet specific business needs. When new custom objects and business processes are built, a public REST API is automatically created for other developers and processes to use. Supports both single-instance and multi-instance custom objects attached to standard Workday business objects such as workers and organizations.
  version: v1
  contact:
    name: Workday Developer Support
    url: https://support.developer.workday.com/s/
  termsOfService: https://www.workday.com/en-us/legal.html
servers:
- url: https://{baseUrl}/api/customObjects/v1/{tenant}
  description: Workday Custom Objects API Server
  variables:
    baseUrl:
      default: api.workday.com
    tenant:
      default: tenant
security:
- OAuth2:
  - customObjects:manage
tags:
- name: Custom Object Fields
  description: Operations for managing the fields and attributes defined within custom object schemas.
paths:
  /customObjectDefinitions/{definitionId}/fields:
    get:
      operationId: listCustomObjectFields
      summary: Workday Extend List custom object fields
      description: Returns the collection of fields defined in the specified custom object definition, including field types, validation rules, and constraints.
      tags:
      - Custom Object Fields
      parameters:
      - $ref: '#/components/parameters/definitionId'
      responses:
        '200':
          description: Successful response with field definitions
          content:
            application/json:
              schema:
                type: object
                properties:
                  total:
                    type: integer
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/CustomObjectField'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
    post:
      operationId: addCustomObjectField
      summary: Workday Extend Add a field to a custom object definition
      description: Adds a new field to the custom object definition. The field will be available on all new and existing instances of this custom object type.
      tags:
      - Custom Object Fields
      parameters:
      - $ref: '#/components/parameters/definitionId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CustomObjectFieldCreate'
      responses:
        '201':
          description: Field successfully added
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CustomObjectField'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  responses:
    Forbidden:
      description: Insufficient permissions
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Unauthorized:
      description: Authentication required
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    BadRequest:
      description: Invalid request parameters
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  schemas:
    CustomObjectField:
      type: object
      properties:
        id:
          type: string
          description: Unique identifier for the field
        name:
          type: string
          description: The API name of the field
        displayName:
          type: string
          description: The display label for the field
        dataType:
          type: string
          enum:
          - text
          - number
          - decimal
          - boolean
          - date
          - dateTime
          - currency
          - reference
          - richText
          description: The data type of the field
        isRequired:
          type: boolean
          description: Whether the field is required
        isReadOnly:
          type: boolean
          description: Whether the field is read-only
        maxLength:
          type: integer
          description: Maximum length for text fields
        precision:
          type: integer
          description: Decimal precision for numeric fields
        referenceObjectType:
          type: string
          description: The Workday object type for reference fields
        defaultValue:
          type: string
          description: Default value for the field
    CustomObjectFieldCreate:
      type: object
      required:
      - name
      - dataType
      properties:
        name:
          type: string
          description: The API name of the field
          maxLength: 128
          pattern: ^[a-zA-Z][a-zA-Z0-9_]*$
        displayName:
          type: string
          description: The display label for the field
        dataType:
          type: string
          enum:
          - text
          - number
          - decimal
          - boolean
          - date
          - dateTime
          - currency
          - reference
          - richText
        isRequired:
          type: boolean
          default: false
        maxLength:
          type: integer
          description: Maximum length for text fields
        referenceObjectType:
          type: string
          description: Required for reference type fields
        defaultValue:
          type: string
    ErrorResponse:
      type: object
      properties:
        error:
          type: string
          description: Error code identifying the type of error
        message:
          type: string
          description: Human-readable error message
  parameters:
    definitionId:
      name: definitionId
      in: path
      required: true
      description: The unique identifier of the custom object definition
      schema:
        type: string
  securitySchemes:
    OAuth2:
      type: oauth2
      flows:
        authorizationCode:
          authorizationUrl: https://{baseUrl}/authorize
          tokenUrl: https://{baseUrl}/oauth2/{tenant}/token
          scopes:
            customObjects:manage: Manage custom object definitions and instances
            customObjects:read: Read custom object data
externalDocs:
  description: Workday Custom Objects Documentation
  url: https://doc.workday.com/extend/custom-objects/