127 lines
3.5 KiB
Python
127 lines
3.5 KiB
Python
# -*- coding: utf-8 -*-
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from django.db import transaction
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from reversion.revisions import revision_context_manager
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from rest_framework import viewsets
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from rest_framework import status
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from rest_framework import mixins
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from rest_framework.response import Response
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from .pagination import HeadersPaginationMixin, ConditionalPaginationMixin
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class CreateModelMixin(mixins.CreateModelMixin):
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@transaction.atomic
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def create(self, *args, **kwargs):
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return super().create(*args, **kwargs)
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class RetrieveModelMixin(mixins.RetrieveModelMixin):
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@transaction.atomic
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def retrieve(self, *args, **kwargs):
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return super().retrieve(*args, **kwargs)
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class UpdateModelMixin(mixins.UpdateModelMixin):
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@transaction.atomic
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def update(self, *args, **kwargs):
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return super().update(*args, **kwargs)
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class ListModelMixin(mixins.ListModelMixin):
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@transaction.atomic
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def list(self, *args, **kwargs):
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return super().list(*args, **kwargs)
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class DestroyModelMixin(mixins.DestroyModelMixin):
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"""
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Self version of DestroyModelMixin with
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pre_delete hook method.
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"""
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def pre_delete(self, obj):
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pass
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@transaction.atomic
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def destroy(self, request, *args, **kwargs):
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obj = self.get_object()
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self.pre_delete(obj)
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obj.delete()
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return Response(status=status.HTTP_204_NO_CONTENT)
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class PreconditionMixin(object):
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def pre_conditions_on_save(self, obj):
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pass
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def pre_conditions_on_delete(self, obj):
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pass
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def pre_save(self, obj):
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super().pre_save(obj)
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self.pre_conditions_on_save(obj)
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def pre_delete(self, obj):
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super().pre_delete(obj)
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self.pre_conditions_on_delete(obj)
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class DetailAndListSerializersMixin(object):
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"""
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Use a diferent serializer class to the list action.
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"""
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list_serializer_class = None
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def get_serializer_class(self):
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if self.action == "list" and self.list_serializer_class:
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return self.list_serializer_class
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return super().get_serializer_class()
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class ReversionMixin(object):
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def dispatch(self, request, *args, **kwargs):
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revision_context_manager.start()
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try:
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response = super().dispatch(request, *args, **kwargs)
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except Exception as e:
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revision_context_manager.invalidate()
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revision_context_manager.end()
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raise
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if self.request.user.is_authenticated():
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revision_context_manager.set_user(self.request.user)
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if response.status_code > 206:
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self._invalidare_revision()
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revision_context_manager.end()
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return response
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class ModelCrudViewSet(DetailAndListSerializersMixin,
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ReversionMixin,
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PreconditionMixin,
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HeadersPaginationMixin,
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ConditionalPaginationMixin,
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CreateModelMixin,
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RetrieveModelMixin,
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UpdateModelMixin,
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DestroyModelMixin,
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ListModelMixin,
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viewsets.GenericViewSet):
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pass
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class ModelListViewSet(DetailAndListSerializersMixin,
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ReversionMixin,
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PreconditionMixin,
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HeadersPaginationMixin,
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ConditionalPaginationMixin,
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RetrieveModelMixin,
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ListModelMixin,
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viewsets.GenericViewSet):
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pass
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