how to access context in serializer queryset-CodePudding

I'm looking for a way to access the context to filter by current user

 class RemovePermissionsSerializer(serializers.Serializer):
        user_permissions = serializers.PrimaryKeyRelatedField(
            many=True, queryset=Permission.objects.filter(user = context.get('request').user)
        )

I can't access context becuase it's undefined, neither self.context

CodePudding user response：

In order to achieve that override get_fields method in RemovePermissionsSerializer as shown below:

class RemovePermissionsSerializer(serializers.Serializer):

def get_fields(self):
    fields = super().get_fields()
    # If you want your logic according to request method
    request = self.context.get('request')
    if request and request.method.lower() == "<your method here>":
        fields['user_permissions'] = serializers.PrimaryKeyRelatedField(
            many=True, queryset=Permission.objects.filter(user=request.user)
        )
    
    return fields

If you want to change representation according to the action you can do something like this:

class RemovePermissionsSerializer(serializers.Serializer):

def get_fields(self):
    fields = super().get_fields()
    # IF you want your logic according to action
    view = self.context.get('view')
    if view and view.action == "<action name>":
        fields['user_permissions'] = serializers.PrimaryKeyRelatedField(
            many=True, queryset=Permission.objects.filter(user=request.user)
        )
    return fields

CodePudding user response：

Did you provide the context when initialising the serializer? If you want the context to be available within the Serializer you will have to provide it yourself, like:

serializer = RemovePermissionsSerializer(instance, context={"request": request})

serializer = RemovePermissionsSerializer(instance, context={"user": request.user})

That is, the request context is not automatically available in the serializer