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swagger - How to return an array of objects in SwaggerHub?

I am defining an API specification in SwaggerHub using OpenAPI 2.0. The /contacts request returns an array of contacts. The definition is below:

  /contacts:     
    get:
      tags:
      - contacts
      summary: Get all the contacts
      description: This displays all the contacts present for the user.
      operationId: getContact
      produces:
      - application/json
      - application/xml  
      responses:
       200:
        description: successful operation
        schema:
          $ref: '#/definitions/AllContacts'
       400:
        description: Invalid id supplied
       404:
        description: Contact not found
       500:
        description: Server error
    definitions:
      AllContacts:
       type: array
       items:
       -  $ref: '#/definitions/ContactModel1'
       -  $ref: '#/definitions/ContactModel2'
    
        
      ContactModel1:
        type: object
        properties:
          id:
            type: integer
            example: 1
          firstName:
            type: string
            example: 'someValue'
          lastName:
            type: string
            example: 'someValue'
            
       ContactModel2:
        type: object
        properties:
          id:
            type: integer
            example: 2
          firstName:
            type: string
            example: 'someValue1'
          lastName:
            type: string
            example: 'someValue1'

For some reason, it only returns the second object not the whole array of objects.

I am using OpenAPI 2.0 and suspect that the arrays are not well supported in this version.


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An array of objects is defined as follows. The value of items must be a single model that describes the array items.

definitions:
  AllContacts:
    type: array
    items:
      $ref: '#/definitions/ContactModel'

  ContactModel:
    type: object
    properties:
      id:
        type: integer
        example: 1
      firstName:
        type: string
        example: Sherlock
      lastName:
        type: string
        example: Holmes

By default, Swagger UI displays the array examples with just one item, like so:

[
  {
     "id": 1,
     "firstName": "Sherlock",
     "lastName": "Holmes"
  }
]

If you want the array example to include multiple items, specify the multi-item example in the array model:

definitions:
  AllContacts:
    type: array
    items:
      $ref: '#/definitions/ContactModel1'
    example:
      - id: 1
        firstName: Sherlock
        lastName: Holmes
      - id: 2
        firstName: John
        lastName: Watson

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