InvalidSpecification raised for OperationId

Reproduce the regression with the conflicting paths in openapi.yaml and inspect the duplicate OperationId validation introduced while resolving issue #96. Compare the behavior in version 0.3.0 with the controller-qualified operation IDs described here. Done means the intended uniqueness behavior is established and the breaking-change or compatibility behavior is covered and documented.

The resolution for issue #96 (duplicated OperationID not detected) introduced a breaking-change or regression. Upon updating dependencies to version 0.3.0, the connexion library now reports this error when I run my longstanding openapi.yaml:

connexion.exceptions.InvalidSpecification: Operation ID 'find' for 'get' in '/apikey' is not unique

Each of my path prefixes refers to a different x-openapi-router-controller class; because they share similar logic, I use the same operationId function name for methods like get/find/delete for each of the controllers.

Shouldn't the duplicate detection logic look for a uniqueness across both x-openapi-router-controller and operationId? If my openapi.yaml file needs updating (due to a change in the standard, or my misunderstanding of the standard), then this breaking-change needs to be called out clearly in changelog / release notes.

I'd like it to handle this use-case; for now I'll adjust openapi.yaml to handle this new behavior in 0.3.0 but this could be a huge headache for other users. Perhaps you should add a compatibility flag for such users to transition between now and the next release.

Below is an example of conflicting paths:

/apikey:
  get:
    summary: Find APIkeys by conditions
    operationId: find
    parameters:
    - description: APIkey ID
      ...
    responses:
      200:
      ...
    x-openapi-router-controller: controllers.apikey.APIkeyController

/message:
  get:
    summary: Find messages by conditions
    operationId: find
    parameters:
    - description: Message ID
      ...
    responses:
      200:
      ...
    x-openapi-router-controller: controllers.message.MessageController