Adding FlexFieldsFilterBackend immediately breaks the app about drf-flex-fields

[pablolmedorado]

Starting from @wolph idea, I have created a mixin to replace the "FlexFieldsMixin" that includes the FilterBackend and also respects the user's settings.

I'll leave the code here just in case there was anyone interested.

from rest_flex_fields.filter_backends import FlexFieldsFilterBackend
from rest_flex_fields.views import FlexFieldsMixin
from rest_framework.settings import api_settings


class FlexFieldsOptimizedMixin(FlexFieldsMixin):
    filter_backends = [FlexFieldsFilterBackend] + api_settings.DEFAULT_FILTER_BACKENDS

from rest_framework import viewsets
from .mixins import FlexFieldsOptimizedMixin


class ModelViewSet(FlexFieldsOptimizedMixin, viewsets.ModelViewSet):
    ...

[bharling]

Yeah seeing this too, but I get:

ImportError: Could not import 'rest_flex_fields.filter_backends.FlexFieldsFilterBackend' for API setting 'DEFAULT_FILTER_BACKENDS'. ImportError: cannot import name 'GenericViewSet'.

looks like a circular import also

[wolph]

As a workaround (I also posted this at #59 which appears to be a duplicate) you can set the filter backend at the view:

import rest_flex_fields.filter_backends as flex_filters
from rest_framework import viewsets


class ModelViewSet(viewsets.ModelViewSet):
    filter_backends = viewsets.ModelViewSet.filter_backends + [
        flex_filters.FlexFieldsFilterBackend,
    ]