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"""
Generic views that provide commmonly needed behaviour.
"""
from rest_framework import views, mixins
from rest_framework.settings import api_settings
from django.views.generic.detail import SingleObjectMixin
from django.views.generic.list import MultipleObjectMixin
### Base classes for the generic views ###
class BaseView(views.APIView):
"""
Base class for all other generic views.
"""
serializer_class = None
model_serializer_class = api_settings.MODEL_SERIALIZER
def get_serializer_context(self):
"""
Extra context provided to the serializer class.
"""
return {
'request': self.request,
'format': self.format_kwarg,
'view': self
}
def get_serializer_class(self):
"""
Return the class to use for the serializer.
Use `self.serializer_class`, falling back to constructing a
model serializer class from `self.model_serializer_class`
"""
serializer_class = self.serializer_class
if serializer_class is None:
class DefaultSerializer(self.model_serializer_class):
class Meta:
model = self.model
serializer_class = DefaultSerializer
return serializer_class
def get_serializer(self, data=None, files=None, instance=None):
# TODO: add support for files
# TODO: add support for seperate serializer/deserializer
serializer_class = self.get_serializer_class()
context = self.get_serializer_context()
return serializer_class(data, instance=instance, context=context)
class MultipleObjectBaseView(MultipleObjectMixin, BaseView):
"""
Base class for generic views onto a queryset.
"""
pagination_serializer_class = api_settings.PAGINATION_SERIALIZER
paginate_by = api_settings.PAGINATE_BY
def get_pagination_serializer_class(self):
"""
Return the class to use for the pagination serializer.
"""
class SerializerClass(self.pagination_serializer_class):
class Meta:
object_serializer_class = self.get_serializer_class()
return SerializerClass
def get_pagination_serializer(self, page=None):
pagination_serializer_class = self.get_pagination_serializer_class()
context = self.get_serializer_context()
return pagination_serializer_class(instance=page, context=context)
class SingleObjectBaseView(SingleObjectMixin, BaseView):
"""
Base class for generic views onto a model instance.
"""
pk_url_kwarg = 'pk' # Not provided in Django 1.3
slug_url_kwarg = 'slug' # Not provided in Django 1.3
def get_object(self):
"""
Override default to add support for object-level permissions.
"""
obj = super(SingleObjectBaseView, self).get_object()
if not self.has_permission(self.request, obj):
self.permission_denied(self.request)
return obj
### Concrete view classes that provide method handlers ###
### by composing the mixin classes with a base view. ###
class ListAPIView(mixins.ListModelMixin,
MultipleObjectBaseView):
"""
Concrete view for listing a queryset.
"""
def get(self, request, *args, **kwargs):
return self.list(request, *args, **kwargs)
class ListCreateAPIView(mixins.ListModelMixin,
mixins.CreateModelMixin,
MultipleObjectBaseView):
"""
Concrete view for listing a queryset or creating a model instance.
"""
def get(self, request, *args, **kwargs):
return self.list(request, *args, **kwargs)
def post(self, request, *args, **kwargs):
return self.create(request, *args, **kwargs)
class RetrieveAPIView(mixins.RetrieveModelMixin,
SingleObjectBaseView):
"""
Concrete view for retrieving a model instance.
"""
def get(self, request, *args, **kwargs):
return self.retrieve(request, *args, **kwargs)
class RetrieveDestroyAPIView(mixins.RetrieveModelMixin,
mixins.DestroyModelMixin,
SingleObjectBaseView):
"""
Concrete view for retrieving or deleting a model instance.
"""
def get(self, request, *args, **kwargs):
return self.retrieve(request, *args, **kwargs)
def delete(self, request, *args, **kwargs):
return self.destroy(request, *args, **kwargs)
class RetrieveUpdateDestroyAPIView(mixins.RetrieveModelMixin,
mixins.UpdateModelMixin,
mixins.DestroyModelMixin,
SingleObjectBaseView):
"""
Concrete view for retrieving, updating or deleting a model instance.
"""
def get(self, request, *args, **kwargs):
return self.retrieve(request, *args, **kwargs)
def put(self, request, *args, **kwargs):
return self.update(request, *args, **kwargs)
def delete(self, request, *args, **kwargs):
return self.destroy(request, *args, **kwargs)
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