wrong Enum type generated when choices have named groups.

[elonzh]

Describe the bug
According to Django document, choices supports named groups but drf-spectacular can not generate right schema.

To Reproduce

For example:

MEDIA_CHOICES = [
    ('Audio', (
            ('vinyl', 'Vinyl'),
            ('cd', 'CD'),
        )
    ),
    ('Video', (
            ('vhs', 'VHS Tape'),
            ('dvd', 'DVD'),
        )
    ),
    ('Unknown', 'Unknown'),
]

will be generated as:

	schema:
          enum:
          - Audio
          - Unknown
          - Video
          type: string

Expected behavior

generates the right schema.

[tfranzel]

wasn't aware of that django feature. yes we should account for that. the right schema would then be enum: ['vinyl', 'cd', 'vhs', 'dvd'], right?

[elonzh]

@tfranzel Yes you are right. Check out django.db.models.fields.Field._check_choices to see how django parse choices

[tfranzel]

@elonzh so there is indeed a small bug in ENUM_NAME_OVERRIDES, but in any case i was unable to produce a schema like stated above. the DRF/Django field mechanics do this transformation automatically. at least that is what i'm observing at the moment.

how did you use MEDIA_CHOICES in field to produce that schema?

[elonzh]

Sorry, maybe it's my mistake, My choices are generated and I can't reproduce this issue now.