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from rest_framework import viewsets,filters
from rest_framework.permissions import BasePermission, AllowAny
from . import models as m
from . import views
from seminar.permissions import AllowWrite
class PermissionMixin(object):
""" Redefines get_permissions so that only organizers can make changes. """
def get_permissions(self):
permission_classes = []
print("get_permissions have been called.")
if self.action in ["create", "update", "partial_update", "destroy"]:
permission_classes = [AllowWrite] # speciální permission na zápis - orgové
else:
permission_classes = [AllowAny]
# návštěvník nemusí být zalogován, aby si prohlížel obsah
return [permission() for permission in permission_classes]
def verejne_nad(self, node):
""" Returns output of verejne for closest Rocnik, Cislo or Problem above.
(All of them have method verejne.)"""
parent = get_parent(node)
while True:
rocnik = isinstance(parent, RocnikNode)
cislo = isinstance(parent, CisloNode)
problem = isinstance(parent, ProblemNode)
if (rocnik or cislo or problem):
break
else:
parent = get_parent(parent)
if rocnik:
return parent.rocnik.verejne()
elif cislo:
return parent.cislo.verejne()
elif problem:
return parent.problem.verjne()
def has_object_permission(self, request, view, obj):
# test that obj is Node
assert isinstance(obj, Node)
return verejne_nad(node)
class ReadWriteSerializerMixin(object):
"""
Overrides get_serializer_class to choose the read serializer
for GET requests and the write serializer for POST requests.
Set read_serializer_class and write_serializer_class attributes on a
viewset.
"""
read_serializer_class = None
create_serializer_class = None
write_serializer_class = None
def get_serializer_class(self):
if self.action == "create":
return self.get_create_serializer_class()
if self.action in ["update", "partial_update", "destroy"]:
return self.get_write_serializer_class()
return self.get_read_serializer_class()
def get_read_serializer_class(self):
assert self.read_serializer_class is not None, (
"'%s' should either include a `read_serializer_class` attribute,"
"or override the `get_read_serializer_class()` method."
% self.__class__.__name__
)
return self.read_serializer_class
def get_write_serializer_class(self):
assert self.write_serializer_class is not None, (
"'%s' should either include a `write_serializer_class` attribute,"
"or override the `get_write_serializer_class()` method."
% self.__class__.__name__
)
return self.write_serializer_class
def get_create_serializer_class(self):
assert self.create_serializer_class is not None, (
"'%s' should either include a `create_serializer_class` attribute,"
"or override the `get_create_serializer_class()` method."
% self.__class__.__name__
)
return self.create_serializer_class
class UlohaVzorakNodeViewSet(PermissionMixin, viewsets.ModelViewSet):
queryset = m.UlohaVzorakNode.objects.all()
serializer_class = views.UlohaVzorakNodeSerializer
class TextViewSet(PermissionMixin, viewsets.ModelViewSet):
queryset = m.Text.objects.all()
serializer_class = views.TextSerializer
class TextNodeViewSet(PermissionMixin, ReadWriteSerializerMixin,viewsets.ModelViewSet):
queryset = m.TextNode.objects.all()
read_serializer_class = views.TextNodeSerializer
write_serializer_class = views.TextNodeWriteSerializer
create_serializer_class = views.TextNodeCreateSerializer
class CastNodeViewSet(PermissionMixin, ReadWriteSerializerMixin,viewsets.ModelViewSet):
queryset = m.CastNode.objects.all()
read_serializer_class = views.CastNodeSerializer
write_serializer_class = views.CastNodeSerializer
create_serializer_class = views.CastNodeCreateSerializer
class UlohaVzorakNodeViewSet(PermissionMixin, viewsets.ModelViewSet):
serializer_class = views.UlohaVzorakNodeSerializer
def get_queryset(self):
queryset = m.UlohaVzorakNode.objects.all()
nazev = self.request.query_params.get('nazev',None)
if nazev is not None:
queryset = queryset.filter(nazev__contains=nazev)
return queryset