python 3.x - context in nested serializers django rest framework -

if have nested serializer:

class childserializer(modelserializer):     class meta:         fields = ('c_name', )         model = child   class parentserializer(modelserializer):      child = childserializer(many=true, read_only=true)      class meta:         model = parent         fields = ('p_name', 'child') 

and want access context in nested serializer, how can that? far can tell, context isn't passed child.

i want able implement permission model per user on fields, overridden get_fields() method of modelserializer:

def get_fields(self):     fields = super().get_fields()     ....     f in fields:         if has_rights(self.context['request'].user, f, "read"):             ret_val[f] = fields[f]     ....     return ret_val 

which works regular serializers, context, , request , user not available when nested child passed get_fields(). how access context when serializer nested?

ok found working solution. replaced childserializer assignment in parent class serializermethodfield adds context. passed get_fields method in custommodelserializer:

class childserializer(custommodelserializer):     class meta:         fields = ('c_name', )         model = child   class parentserializer(custommodelserializer):      child = serializers.serializermethodfield('get_child_serializer')      class meta:         model = parent         fields = ('p_name', 'child')      def get_child_serializer(self, obj):         serializer_context = {'request': self.context.get('request') }         children = child.objects.all().filter(parent=obj)         serializer = childserializer(children, many=true, context=serializer_context)         return serializer.data 

and in custommodelserializer:

class custommodelserializer(rest_serializer_classes.hyperlinkedmodelserializer):      def __init__(self, *args, **kwargs):         """             make sure user coupled serializer (needed permissions)         """         super().__init__(*args, **kwargs)         if not self.context:             self._context = getattr(self.meta, 'context', {})         try:             self.user = self.context['request'].user         except keyerror:             self.user = none       def get_fields(self):         ret = ordereddict()          if not self.user:             print("no user associated object")             return ret          fields = super().get_fields()          # bypass permission if superuser         if self.user.is_superuser:             return fields          f in fields:             if has_right(self.user, self.meta.model.__name__.lower(), f, "read"):                 ret[f] = fields[f]          return ret 

this seems work fine, , fields of child discarded in serializer when either revoke read-rights on child.c_name or on parent.child