Cannot read property '0' of undefined

[erajkovic]

With latest version of swagger UI, getting same error as reported in issue #720 - the same swagger file was properly loaded in older version of swagger UI.

Resolver error
Cannot read property '0' of undefined

To reproduce, load https://apicatalog.oraclecloud.com/public/v1/orgs/oracle-public/apicollections/compute/1.0/apis/VirtualNICs/canonical in http://petstore.swagger.io/

Thanks,
-Eric

[webron]

Looks like this is a result of a psuedo-circular reference, that shouldn't even be resolved.

[etki]

Having the same issue (with pseudo-circular reference as well). I have Region that may have itself in parents (renders as null, and that's okay with me), but when another entity is present (SubwayStation that also lists regions in parents), error strikes in; whenever i drop parents property from any of them, error goes. Sadly couldn't reproduce in a minimal example.

[san4io]

Same for me then upgraded to 3.6.0.

Downgraded to :
"swagger-api/swagger-ui": "3.5.0"

And everything works fine.

[shockey]

@san4io, can you provide your API definition? If it worked in 3.5.0, there may be a regression that we need to look into, but we can't do that without something to test with 😄

[rusinv]

Having similar issue (as I suppose): "Cannot read property '/route' of undefined":

openapi: 3.0.0
info: 
  version: '0.1'
  title: 'test'

paths:

  /route:
    get:
      responses:
        '200':
          description: Descr
          content:
            'application/json':
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessfulResponseContainer'
                properties:
                  payload:
                    $ref: '#/components/schemas/PayloadContents'

components:
  schemas:
    ResponseContainer:
      type: object
      properties:
        type:
          type: integer
        payload:
          type: object

    SuccessfulResponseContainer:
      allOf:
        - $ref: '#/components/schemas/ResponseContainer'
      properties:
        type:
          type: integer

    Payload:
      type: object
      properties:
        prop1:
          type: string

    PayloadContents:
      type: object
      allOf:
        - $ref: '#/components/schemas/Payload'
      properties:
        prop2:
          type: string

Error disappears if I reduce depth of inheritance:

...
    PayloadContents:
      type: object
      #allOf:
       # - $ref: '#/components/schemas/Payload'
      properties:
        prop2:
          type: string
...

[san4io]

Sorry, was on vacation, today I'll provide you with json.

[san4io]

{"swagger":"2.0","info":{"title":"Accommobay API","version":"1.0.0"},"basePath":"/v1/","consumes":["application/json"],"produces":["application/json"],"paths":{"/auth/password/forgot":{"post":{"tags":["1. Auth API"],"summary":"Forgotten User password","description":"Send email to user with reset link","operationId":"forgotten_password","consumes":["multipart/form-data"],"produces":["application/json"],"parameters":[{"name":"email","in":"formData","description":"User email","required":true,"type":"string"}],"responses":{"200":{"description":"Successful Operation"},"422":{"description":"Wrong Email address"}}}},"/auth/authenticate":{"post":{"tags":["1. Auth API"],"summary":"Authenticate User","description":"Authenticate user","operationId":"authenticate","consumes":["multipart/form-data"],"produces":["application/json"],"parameters":[{"name":"email","in":"formData","description":"User email","required":true,"type":"string"},{"name":"password","in":"formData","description":"User password","required":true,"type":"string"}],"responses":{"200":{"description":"Successful Operation"}}}},"/auth/me":{"get":{"tags":["1. Auth API"],"summary":"Get current user info","description":"Returns user info by authorization header","operationId":"user_me","produces":["application/json"],"responses":{"200":{"description":"successful operation","schema":{"$ref":"#/definitions/User"}}},"security":[{"bearer_token":[]}]}},"/auth/token/refresh":{"post":{"tags":["1. Auth API"],"summary":"Refresh User Token","description":"Refresh user token","operationId":"user_refresh","consumes":["multipart/form-data"],"produces":["application/json"],"parameters":[{"name":"token","in":"formData","description":"User refresh token","required":true,"type":"string"}],"responses":{"200":{"description":"Successful Operation"}}}},"/auth/register":{"post":{"tags":["1. Auth API"],"summary":"Register User","description":"Register user","operationId":"register","consumes":["multipart/form-data"],"produces":["application/json"],"parameters":[{"name":"name","in":"formData","description":"User name","required":true,"type":"string"},{"name":"surname","in":"formData","description":"User surname","required":true,"type":"string"},{"name":"email","in":"formData","description":"User email","required":true,"type":"string"},{"name":"password","in":"formData","description":"User password","required":true,"type":"string"},{"name":"password_confirmation","in":"formData","description":"User password confirmation","required":true,"type":"string"},{"name":"phone","in":"formData","description":"User phone","required":false,"type":"string"},{"name":"country_id","in":"formData","description":"User country id","required":false,"type":"string"}],"responses":{"200":{"description":"Successful Operation"}}}},"/auth/password/reset":{"post":{"tags":["1. Auth API"],"summary":"Reset User password","description":"Resets user password","operationId":"reset_password","consumes":["multipart/form-data"],"produces":["application/json"],"parameters":[{"name":"email","in":"formData","description":"User email","required":true,"type":"string"},{"name":"password","in":"formData","description":"User password","required":true,"type":"string"},{"name":"password_confirmation","in":"formData","description":"User password confirmation","required":true,"type":"string"},{"name":"token","in":"formData","description":"Reset password token","required":true,"type":"string"}],"responses":{"200":{"description":"Successful Operation"},"401":{"description":"Unauthorized"}}}},"/claims":{"get":{"tags":["3. Claim API"],"summary":"Get Claim List","description":"Retrieve own claims","operationId":"claims","produces":["claim/json"],"responses":{"200":{"description":"successful operation","schema":{"$ref":"#/definitions/OwnPaginatedClaim"}}},"security":[{"bearer_token":[]}]},"post":{"tags":["3. Claim API"],"summary":"Create new Claim object","description":"Creates and returns Claim","operationId":"claim_create","produces":["claim/json"],"parameters":[{"name":"body","in":"body","description":"Claim object","required":true,"schema":{"$ref":"#/definitions/Claim"}}],"responses":{"200":{"description":"successful operation","schema":{"$ref":"#/definitions/Claim"}}},"security":[{"bearer_token":[]}]}},"/claims/{claim-id}":{"get":{"tags":["3. Claim API"],"summary":"Get Claim by it's ID","description":"Returns Claim and related info","operationId":"claim_get","produces":["claim/json"],"parameters":[{"name":"claim-id","in":"path","description":"ID of claim","required":true,"type":"string","format":"string"}],"responses":{"200":{"description":"successful operation","schema":{"$ref":"#/definitions/OwnClaimList"}}},"security":[{"bearer_token":[]}]},"put":{"tags":["3. Claim API"],"summary":"Update an existing Claim","description":"Update Claim","operationId":"claim_update","parameters":[{"name":"claim-id","in":"path","description":"ID of Claim","required":true,"type":"string","format":"string"},{"name":"body","in":"body","description":"Place object that needs to be updated","required":true,"schema":{"$ref":"#/definitions/Claim"}}],"responses":{"200":{"description":"successful operation","schema":{"$ref":"#/definitions/Claim"}}},"security":[{"bearer_token":[]}]},"delete":{"tags":["3. Claim API"],"summary":"Remove Claim","description":"Removes Claim, only owner of Claim can remove it.","operationId":"claim_destroy","produces":["claim/json"],"parameters":[{"name":"claim-id","in":"path","description":"Claim id to delete","required":true,"type":"string","format":"string"}],"responses":{"200":{"description":"Removed successfully"}},"security":[{"bearer_token":[]}]}},"/claims/confirm/{claim-id}":{"post":{"tags":["3. Claim API"],"summary":"Confirm claim","description":"Confirms Claim","operationId":"claim_confirm","produces":["claim/json"],"parameters":[{"name":"claim-id","in":"path","description":"ID of Claim","required":true,"type":"string","format":"string"}],"responses":{"200":{"description":"successful operation","schema":{"$ref":"#/definitions/Claim"}}},"security":[{"bearer_token":[]}]}},"/oauth/personal-access-tokens":{"get":{"tags":["5. OAuth API"],"summary":"Get Personal Tokens","description":"Retrieve personal tokens","operationId":"tokens_get","produces":["application/json"],"responses":{"200":{"description":"List retrieved successfully"}},"security":[{"bearer_token":[]}]},"post":{"tags":["5. OAuth API"],"summary":"Get Personal Tokens","description":"Retrieve personal tokens","operationId":"tokens_get","produces":["application/json"],"parameters":[{"name":"body","in":"body","description":"Claim object","required":true,"schema":{"$ref":"#/definitions/Token"}}],"responses":{"200":{"description":"Token created successfully"}},"security":[{"bearer_token":[]}]}},"/oauth/personal-access-tokens/{token-id}":{"delete":{"tags":["5. OAuth API"],"summary":"Remove Personal Token","description":"Remove personal tokens","operationId":"tokens_delete","produces":["application/json"],"parameters":[{"name":"token-id","in":"path","description":"Token id to delete","required":true,"type":"string","format":"string"}],"responses":{"200":{"description":"Removed successfully"}},"security":[{"bearer_token":[]}]}},"/places":{"get":{"tags":["2. Place API"],"summary":"Get Own Place List","description":"Retrieve own places","operationId":"places_own","produces":["application/json"],"parameters":[{"name":"query","in":"query","description":"Searchable string","required":false,"type":"string"}],"responses":{"200":{"description":"successful operation","schema":{"$ref":"#/definitions/PaginatedPlace"}}},"security":[{"bearer_token":[]}]},"post":{"tags":["2. Place API"],"summary":"Create new Place object","description":"Creates and returns Place","operationId":"place_create","produces":["application/json"],"parameters":[{"name":"body","in":"body","description":"Offer object","required":true,"schema":{"$ref":"#/definitions/Place"}}],"responses":{"200":{"description":"successful operation","schema":{"$ref":"#/definitions/Place"}}},"security":[{"bearer_token":[]}]}},"/places/{place-id}":{"get":{"tags":["2. Place API"],"summary":"Get Place by it's ID","description":"Returns Place and related info","operationId":"place_get","produces":["application/json"],"parameters":[{"name":"place-id","in":"path","description":"ID of place","required":true,"type":"string","format":"string"}],"responses":{"200":{"description":"successful operation","schema":{"$ref":"#/definitions/Place"}}}},"put":{"tags":["2. Place API"],"summary":"Update an existing Place","description":"Update Place","operationId":"place_update","parameters":[{"name":"place-id","in":"path","description":"ID of Place","required":true,"type":"string","format":"string"},{"name":"body","in":"body","description":"Place object that needs to be updated","required":true,"schema":{"$ref":"#/definitions/Place"}}],"responses":{"200":{"description":"successful operation","schema":{"$ref":"#/definitions/Place"}}},"security":[{"bearer_token":[]}]},"delete":{"tags":["2. Place API"],"summary":"Remove Place","description":"Removes Place, only owner of tender can remove it.","operationId":"place_destroy","produces":["application/json"],"parameters":[{"name":"place-id","in":"path","description":"Place id to delete","required":true,"type":"string","format":"string"}],"responses":{"200":{"description":"Removed successfully"}},"security":[{"bearer_token":[]}]}},"/places/search":{"post":{"tags":["2. Place API"],"summary":"Get Place List","description":"Retrieve all places","operationId":"places","produces":["application/json"],"responses":{"200":{"description":"successful operation","schema":{"$ref":"#/definitions/PaginatedPlace"}}}}},"/utils/address":{"get":{"tags":["4. Utils API"],"summary":"Get Address suggestions","description":"Get Address suggestions","operationId":"address","produces":["application/json"],"parameters":[{"name":"q","in":"query","description":"Search query","required":true,"type":"string"},{"name":"limit","in":"query","description":"Limit","type":"integer"},{"name":"country_code","in":"query","description":"Country code","type":"string"}],"responses":{"200":{"description":"successful operation","schema":{"type":"array","items":{"$ref":"#/definitions/GeoBag"}}}}}},"/utils/countries":{"get":{"tags":["4. Utils API"],"summary":"Get Countries List","description":"Retrieve all countries","operationId":"types","produces":["application/json"],"responses":{"200":{"description":"successful operation","schema":{"type":"array","items":{"$ref":"#/definitions/Country"}}}}}},"/utils/types":{"get":{"tags":["4. Utils API"],"summary":"Get Types List","description":"Retrieve all types","operationId":"types","produces":["application/json"],"responses":{"200":{"description":"successful operation","schema":{"type":"array","items":{"$ref":"#/definitions/Type"}}}}}}},"definitions":{"Answer":{"properties":{"answer":{"description":"Place name","type":"string","format":"string","example":"Not smoking"},"question_id":{"description":"Question id","type":"integer","format":"number","example":4}}},"Claim":{"properties":{"id":{"description":"Place id","type":"integer","format":"integer","example":1},"place_id":{"description":"Place id","type":"integer","format":"integer","example":1},"user_id":{"description":"Place id","type":"integer","format":"integer","example":1},"created_at":{"description":"Place creation date","type":"string","format":"string","example":"2017-09-16 21:51:59"},"updated_at":{"description":"Place was updated","type":"string","format":"string","example":"2017-09-16 21:51:59"},"answers":{"type":"array","items":{"$ref":"#/definitions/Answer"}}}},"OwnClaimList":{"properties":{"place":{"$ref":"#/definitions/Place"}},"type":"object","allOf":[{"$ref":"#/definitions/Claim"}]},"ClaimList":{"properties":{"user":{"$ref":"#/definitions/User"}},"type":"object","allOf":[{"$ref":"#/definitions/OwnClaimList"}]},"OwnPaginatedClaim":{"properties":{"data":{"type":"array","items":{"$ref":"#/definitions/OwnClaimList"}},"path":{"type":"string","format":"string","example":"http://localhost/api/v1/application"},"first_page_url":{"type":"string","format":"string","example":"http://localhost/api/v1/application?page=1"},"last_page_url":{"type":"string","format":"string","example":"http://localhost/api/v1/application?page=10"},"next_page_url":{"type":"string","format":"string","example":"http://localhost/api/v1/application?page=3"},"prev_page_url":{"type":"number","format":"string","example":"http://localhost/api/v1/application?page=1"}},"type":"object","allOf":[{"$ref":"#/definitions/pagination"}]},"Country":{"properties":{"id":{"description":"Country id","type":"integer","format":"integer","example":1},"code":{"description":"Country code","type":"string","format":"string","example":"LV"},"name":{"description":"Country name","type":"string","format":"string","example":"Latvia (Latvija)"},"common":{"description":"Country common name","type":"string","format":"string","example":"Latvia"},"currency":{"description":"Country currency","type":"string","format":"string","example":"EUR"},"call_code":{"description":"Country call code","type":"string","format":"string","example":"+371"}}},"Place":{"properties":{"id":{"description":"Place id","type":"integer","format":"integer","example":1},"title":{"description":"Place name","type":"string","format":"string","example":"Best room in the world"},"address":{"description":"Place address","type":"string","format":"string","example":"Fabijoni\u0161ki\u0173 g. 15, Vilnius"},"description":{"description":"Place email","type":"string","format":"string","example":"Best room in the world description"},"price":{"description":"Place price","type":"string","format":"string","example":25.95},"area":{"description":"Place area in m^2","type":"string","format":"string","example":25.24},"rooms":{"description":"Place rooms","type":"string","format":"string","example":2},"bathrooms":{"description":"Place rooms","type":"string","format":"string","example":1},"floor":{"description":"Place floors","type":"string","format":"string","example":3},"floor_count":{"description":"Building floors","type":"string","format":"string","example":8},"year":{"description":"Place year of build","type":"string","format":"string","example":2016},"action":{"description":"Place for rent or sell","type":"string","format":"string","example":1},"type_id":{"description":"Place type","type":"string","format":"string","example":2},"country_id":{"description":"Place country","type":"string","format":"string","example":101},"location":{"$ref":"#/definitions/location"},"created_at":{"description":"Place creation date","type":"string","format":"string","example":"2017-09-16 21:51:59"},"updated_at":{"description":"Place was updated","type":"string","format":"string","example":"2017-09-16 21:51:59"}}},"PaginatedPlace":{"properties":{"data":{"type":"array","items":{"$ref":"#/definitions/Place"}},"path":{"type":"string","format":"string","example":"http://localhost/api/v1/place"},"first_page_url":{"type":"string","format":"string","example":"http://localhost/api/v1/place?page=1"},"last_page_url":{"type":"string","format":"string","example":"http://localhost/api/v1/place?page=10"},"next_page_url":{"type":"string","format":"string","example":"http://localhost/api/v1/place?page=3"},"prev_page_url":{"type":"number","format":"string","example":"http://localhost/api/v1/place?page=1"}},"type":"object","allOf":[{"$ref":"#/definitions/pagination"}]},"Type":{"properties":{"id":{"description":"Type id","type":"integer","format":"integer","example":1},"name":{"description":"Type name","type":"string","format":"string","example":"room_rent"}}},"User":{"properties":{"id":{"description":"User id","type":"integer","format":"integer","example":1},"name":{"description":"User name","type":"string","format":"string","example":"Zbignev"},"surname":{"description":"User surname","type":"string","format":"string","example":"Balcevi\u010d"},"email":{"description":"User email","type":"string","format":"string","example":"zbignev@mail.pl"},"country_id":{"description":"User email","type":"string","format":"string","example":96},"phone":{"description":"User phone","type":"string","format":"string","example":"+37060674779"},"created_at":{"description":"User creation date","type":"string","format":"string","example":"2017-09-16 21:51:59"},"updated_at":{"description":"User updated at","type":"string","format":"string","example":"2017-09-16 21:51:59"}}},"GeoBag":{"properties":{"formatted":{"description":"Fabijoni\u0161ki\u0173 g., Fabijoni\u0161ki\u0173 seni\u016bnija, Vilnius, Vilnius city municipality, Vilnius County, 06328, Lithuania","type":"string","format":"string","example":""},"coordinates":{"description":"Location of the value. Latitude, Longitude","type":"number","format":"double","maxItems":2,"minItems":2,"example":[48.870465,2.351447]}}},"pagination":{"properties":{"current_page":{"type":"number","format":"integer","example":2},"from":{"type":"number","format":"integer","example":16},"last_page":{"type":"number","format":"integer","example":10},"per_page":{"type":"number","format":"integer","example":15},"to":{"type":"number","format":"integer","example":30},"total":{"type":"number","format":"integer","example":150},"path":{"type":"string","format":"string","example":"http://localhost/api/v1/entity"},"first_page_url":{"type":"string","format":"string","example":"http://localhost/api/v1/entity?page=1"},"last_page_url":{"type":"string","format":"string","example":"http://localhost/api/v1/entity?page=10"},"next_page_url":{"type":"string","format":"string","example":"http://localhost/api/v1/entity?page=3"},"prev_page_url":{"type":"number","format":"string","example":"http://localhost/api/v1/entity?page=1"}},"type":"object"},"location":{"properties":{"type":{"description":"GeoJson point","type":"string","format":"string","example":"Point"},"coordinates":{"description":"Location of the value. Latitude, Longitude","type":"number","format":"double","maxItems":2,"minItems":2,"example":[48.870465,2.351447]}}},"Token":{"properties":{"name":{"type":"string","format":"string","example":"My Token"},"scopes":{"type":"array","format":"array","items":{}}}}},"externalDocs":{"description":"GeoJson Objects","url":"http://geojson.org/"},"securityDefinitions":{"bearer_token":{"type":"apiKey","description":"OAuth 2.0 Laravel Passport authorization","name":"Authorization","in":"header"}}}

[jeff9finger]

I am having this issue as well, with swagger-ui 3.9.1 which uses swagger-js (swagger-client) 3.4.5.

[erajkovic]

I am still having the issue with the latest swagger ui - we are on 3.9.1 now (see https://apicatalog.oraclecloud.com/ui/views/swaggerui3/oracle-public/compute/default/SecIPLists) , and I tested internally with 3.10.0

[shockey]

@erajkovic can you try with UI 3.12.0 as well?

Take note that resolution happens on model/operation expansion now, so you may need to manually expand your document to see if the error arises.