Closes#5528.
Viewset custom actions (@detail_route etc) OPTIONS (and HEAD) methods were not being excluded from Schema Generations.
This PR adds a test reproducing the reported error and adjusts `EndpointEnumerator.get_allowed_methods()` to filter ViewSet actions in the same way as other `APIView`s
* Fixed issues with schema name collisions
* Fixed mutating issues in python 3
* Optimized solution
* Fixed isort
* Removed not needed cast
* Fix for key collision
* Added preferred key to preserve if available
* Add accidently removed test
* Add tests for schema exclusions
* Move exclusion check to should_include_endpoint
* Update docs
* Switch to using `schema = None`
* Test PendingDeprecationWarnings
* Add note to release notes.
* s/deprecated/pending deprecation/
* Add PR link to release notes
* Correct typo in test class name
* Test 'exclude_from_schema' deprecation warning message (#1)
* Correct deprecation warning message
* Initial Refactor Step
* Add descriptor class
* call from generator
* proxy back to generator for implementation.
* Move `get_link` to descriptor
* Move `get_description` to descriptor
* Remove need for generator in get_description
* Move get_path_fields to descriptor
* Move `get_serializer_fields` to descriptor
* Move `get_pagination_fields` to descriptor
* Move `get_filter_fields` to descriptor
* Move `get_encoding` to descriptor.
* Pass just `url` from SchemaGenerator to descriptor
* Make `view` a property
Encapsulates check for a view instance.
* Adjust API Reference docs
* Add `ManualSchema` class
* Refactor to `ViewInspector` plus `AutoSchema`
The interface then is **just** `get_link()`
* Add `manual_fields` kwarg to AutoSchema
* Add schema decorator for FBVs
* Adjust comments
* Docs: Provide full params in example
Ref feedback b52e372f8f (r137254795)
* Add docstring for ViewInstpector.__get__ descriptor method.
Ref https://github.com/encode/django-rest-framework/pull/5354#discussion_r137265022
* Make `schemas` a package.
* Split generators, inspectors, views.
* Adjust imports
* Rename to EndpointEnumerator
* Adjust ManualSchema to take `fields`
… and `description`.
Allows `url` and `action` to remain dynamic
* Add package/module docstrings