mirror of
https://github.com/encode/django-rest-framework.git
synced 2024-11-11 04:07:39 +03:00
116 lines
4.1 KiB
Python
116 lines
4.1 KiB
Python
"""
|
|
Basic building blocks for generic class based views.
|
|
|
|
We don't bind behaviour to http method handlers yet,
|
|
which allows mixin classes to be composed in interesting ways.
|
|
|
|
Eg. Use mixins to build a Resource class, and have a Router class
|
|
perform the binding of http methods to actions for us.
|
|
"""
|
|
from django.http import Http404
|
|
from rest_framework import status
|
|
from rest_framework.response import Response
|
|
|
|
|
|
class CreateModelMixin(object):
|
|
"""
|
|
Create a model instance.
|
|
Should be mixed in with any `BaseView`.
|
|
"""
|
|
def create(self, request, *args, **kwargs):
|
|
serializer = self.get_serializer(data=request.DATA)
|
|
if serializer.is_valid():
|
|
self.object = serializer.save()
|
|
return Response(serializer.data, status=status.HTTP_201_CREATED)
|
|
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
|
|
|
|
|
|
class ListModelMixin(object):
|
|
"""
|
|
List a queryset.
|
|
Should be mixed in with `MultipleObjectBaseView`.
|
|
"""
|
|
empty_error = u"Empty list and '%(class_name)s.allow_empty' is False."
|
|
|
|
def list(self, request, *args, **kwargs):
|
|
self.object_list = self.get_queryset()
|
|
|
|
# Default is to allow empty querysets. This can be altered by setting
|
|
# `.allow_empty = False`, to raise 404 errors on empty querysets.
|
|
allow_empty = self.get_allow_empty()
|
|
if not allow_empty and len(self.object_list) == 0:
|
|
error_args = {'class_name': self.__class__.__name__}
|
|
raise Http404(self.empty_error % error_args)
|
|
|
|
# Pagination size is set by the `.paginate_by` attribute,
|
|
# which may be `None` to disable pagination.
|
|
page_size = self.get_paginate_by(self.object_list)
|
|
if page_size:
|
|
paginator, page, queryset, is_paginated = self.paginate_queryset(self.object_list, page_size)
|
|
serializer = self.get_pagination_serializer(page)
|
|
else:
|
|
serializer = self.get_serializer(instance=self.object_list)
|
|
|
|
return Response(serializer.data)
|
|
|
|
|
|
class RetrieveModelMixin(object):
|
|
"""
|
|
Retrieve a model instance.
|
|
Should be mixed in with `SingleObjectBaseView`.
|
|
"""
|
|
def retrieve(self, request, *args, **kwargs):
|
|
self.object = self.get_object()
|
|
serializer = self.get_serializer(instance=self.object)
|
|
return Response(serializer.data)
|
|
|
|
|
|
class UpdateModelMixin(object):
|
|
"""
|
|
Update a model instance.
|
|
Should be mixed in with `SingleObjectBaseView`.
|
|
"""
|
|
def update(self, request, *args, **kwargs):
|
|
self.object = self.get_object()
|
|
serializer = self.get_serializer(data=request.DATA, instance=self.object)
|
|
if serializer.is_valid():
|
|
self.object = serializer.save()
|
|
return Response(serializer.data)
|
|
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
|
|
|
|
|
|
class DestroyModelMixin(object):
|
|
"""
|
|
Destroy a model instance.
|
|
Should be mixed in with `SingleObjectBaseView`.
|
|
"""
|
|
def destroy(self, request, *args, **kwargs):
|
|
self.object = self.get_object()
|
|
self.object.delete()
|
|
return Response(status=status.HTTP_204_NO_CONTENT)
|
|
|
|
|
|
# TODO: Remove MetadataMixin, and implement on APIView.options()
|
|
class MetadataMixin(object):
|
|
"""
|
|
Return a dicitonary of view metadata.
|
|
Should be mixed in with any `BaseView`.
|
|
|
|
This mixin is typically used for the HTTP 'OPTIONS' method.
|
|
"""
|
|
def metadata(self, request, *args, **kwargs):
|
|
content = {
|
|
'name': self.get_name(),
|
|
'description': self.get_description(),
|
|
'renders': [renderer.media_type for renderer in self.renderer_classes],
|
|
'parses': [parser.media_type for parser in self.parser_classes],
|
|
}
|
|
# TODO: Add 'fields', from serializer info.
|
|
# serializer = self.get_serializer()
|
|
# if serializer is not None:
|
|
# field_name_types = {}
|
|
# for name, field in form.fields.iteritems():
|
|
# field_name_types[name] = field.__class__.__name__
|
|
# content['fields'] = field_name_types
|
|
return Response(content, status=status.HTTP_200_OK)
|