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views.py
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views.py
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from django.db.models import F
from django.shortcuts import get_object_or_404
from rest_framework import status
from rest_framework.generics import DestroyAPIView, UpdateAPIView, RetrieveAPIView
from rest_framework.mixins import CreateModelMixin
from rest_framework.response import Response
from core.common.constants import HEAD, LIMIT_PARAM
from core.common.mixins import ListWithHeadersMixin, ConceptDictionaryMixin
from core.common.utils import compact_dict_by_values
from core.common.views import BaseAPIView
from core.concepts.permissions import CanEditParentDictionary, CanViewParentDictionary
from core.mappings.models import Mapping
from core.mappings.serializers import MappingDetailSerializer, MappingListSerializer
class MappingBaseView(BaseAPIView):
lookup_field = 'mapping'
pk_field = 'mnemonic'
model = Mapping
permission_classes = (CanViewParentDictionary,)
queryset = Mapping.objects.filter(is_active=True)
@staticmethod
def get_detail_serializer(obj, data=None, files=None, partial=False):
return MappingDetailSerializer(obj, data, files, partial)
def get_filter_params(self):
kwargs = self.kwargs.copy()
query_params = self.request.query_params.copy()
kwargs.update(query_params)
return compact_dict_by_values(kwargs)
def get_queryset(self):
return Mapping.get_base_queryset(self.get_filter_params())
class MappingListView(MappingBaseView, ListWithHeadersMixin, CreateModelMixin):
serializer_class = MappingListSerializer
def get_permissions(self):
if self.request.method == 'POST':
return [CanEditParentDictionary(), ]
return [CanViewParentDictionary(), ]
def get_serializer_class(self):
if (self.request.method == 'GET' and self.is_verbose(self.request)) or self.request.method == 'POST':
return MappingDetailSerializer
return MappingListSerializer
def get_queryset(self):
is_latest_version = 'collection' not in self.kwargs
queryset = super().get_queryset()
if is_latest_version:
queryset = queryset.filter(id=F('versioned_object_id'))
return queryset.select_related('parent__organization', 'parent__user')
def get(self, request, *args, **kwargs):
return self.list(request, *args, **kwargs)
def set_parent_resource(self):
from core.sources.models import Source
source = self.kwargs.pop('source', None)
source_version = self.kwargs.pop('version', HEAD)
parent_resource = None
if source:
parent_resource = Source.get_version(source, source_version)
self.kwargs['parent_resource'] = self.parent_resource = parent_resource
def post(self, request, **kwargs): # pylint: disable=unused-argument
self.set_parent_resource()
serializer = self.get_serializer(data={
**request.data, 'parent_id': self.parent_resource.id
})
if serializer.is_valid():
self.object = serializer.save()
if serializer.is_valid():
headers = self.get_success_headers(serializer.data)
serializer = MappingDetailSerializer(self.object)
return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
class MappingRetrieveUpdateDestroyView(MappingBaseView, RetrieveAPIView, UpdateAPIView, DestroyAPIView):
serializer_class = MappingDetailSerializer
def get_object(self, queryset=None):
return get_object_or_404(self.get_queryset(), id=F('versioned_object_id'))
def get_permissions(self):
if self.request.method in ['GET']:
return [CanViewParentDictionary(), ]
return [CanEditParentDictionary(), ]
def update(self, request, *args, **kwargs):
self.object = self.get_object()
partial = kwargs.pop('partial', True)
if self.object is None:
return Response(
{'non_field_errors': 'Could not find mapping to update'}, status=status.HTTP_404_NOT_FOUND
)
self.parent_resource = self.object.parent
if self.parent_resource != self.parent_resource.head:
return Response(
{'non_field_errors': 'Parent version is not the latest. Cannot update mapping.'},
status=status.HTTP_400_BAD_REQUEST
)
self.object = self.object.clone()
serializer = self.get_serializer(self.object, data=request.data, partial=partial)
success_status_code = status.HTTP_200_OK
if serializer.is_valid():
self.object = serializer.save()
if serializer.is_valid():
serializer = MappingDetailSerializer(self.object, context={'request': request})
return Response(serializer.data, status=success_status_code)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
def destroy(self, request, *args, **kwargs):
mapping = self.get_object()
if not mapping:
return Response(
dict(non_field_errors='Could not find mapping to retire'),
status=status.HTTP_404_NOT_FOUND
)
comment = request.data.get('update_comment', None) or request.data.get('comment', None)
errors = mapping.retire(request.user, comment)
if errors:
return Response(errors, status=status.HTTP_400_BAD_REQUEST)
return Response(status=status.HTTP_204_NO_CONTENT)
class MappingVersionsView(MappingBaseView, ConceptDictionaryMixin, ListWithHeadersMixin):
serializer_class = MappingListSerializer
permission_classes = (CanViewParentDictionary,)
def get(self, request, *args, **kwargs):
self.serializer_class = MappingDetailSerializer if self.is_verbose(request) else MappingListSerializer
return self.list(request, *args, **kwargs)
class MappingVersionRetrieveView(MappingBaseView, RetrieveAPIView):
serializer_class = MappingDetailSerializer
permission_classes = (CanViewParentDictionary,)
def get_object(self, queryset=None):
return self.get_queryset().first()
class MappingVersionListAllView(MappingBaseView, ListWithHeadersMixin):
permission_classes = (CanViewParentDictionary,)
def get_serializer_class(self):
if self.is_verbose(self.request):
return MappingDetailSerializer
return MappingListSerializer
def get_queryset(self):
queryset = Mapping.global_listing_queryset(
self.get_filter_params(), self.request.user
).select_related(
'parent__organization', 'parent__user',
)
limit = int(self.request.query_params.get(LIMIT_PARAM, 25))
return queryset[0:limit]
def get(self, request, *args, **kwargs):
return self.list(request, *args, **kwargs)