[英]Filtering Many-to-many field in Rest Framework
Im working with the Django REST Framwork and got some issues with the Browsable api. 我正在使用Django REST Framwork,但Browsable api出现了一些问题。 I cannot filter a ManyToMany field so that it only shows the objects which the user is owner of.
我无法过滤ManyToMany字段,因此它仅显示用户所属的对象。 I do manage to filter the the user and filter out m own objects.
我确实设法过滤用户并过滤出m个对象。
In the serializer I have 在序列化器中
class BidSerializer(serializers.HyperlinkedModelSerializer):
id = serializers.HyperlinkedRelatedField(view_name='bid-detail', read_only=True)
def __init__(self, *args, **kwargs):
super(BidSerializer, self).__init__(*args, **kwargs)
request_user = self.context['request'].user
self.fields['my_items'].queryset = Item.objects.filter(owner=request_user)
print(self.fields['my_items'].queryset)
self.fields['others_items'].queryset = Item.objects.exclude(owner=request_user)
self.fields['user'].queryset = User.objects.filter(username=request_user)
class Meta:
model = Bid
fields = ('id','comment','user','others_items','my_items','timestamp')
The strange thing is that the fields 'user' and 'others_items' are filtered as supposed. 奇怪的是,字段“ user”和“ others_items”按预期方式进行了过滤。 While 'my_items' is not filtered but showing all items.
虽然“ my_items”未过滤,但显示了所有项目。 However the line containing the print statement shows a correct output.
但是,包含print语句的行显示正确的输出。 The difference between the fields is that my_items is a ManyToMany field and others_items is a foreign key.
字段之间的区别在于my_items是ManyToMany字段,others_items是外键。
Should it be possible to filter as I like? 是否应该可以按我的意愿进行过滤? If not why and how could I filter my choices in a better way?
如果不是,为什么以及如何更好地过滤我的选择?
I ran into this same issue and after inspecting one of my many-to-many fields in my debugger I discovered the child_relation
property on the many-to-many field which had a queryset
property. 我遇到了同样的问题,在调试器中检查了我的多对多字段之一后,我发现了具有
child_relation
属性的多对多字段上的queryset
属性。 Adding child_relation
property in front of the queryset worked for me. 在queryset前面添加
child_relation
属性对我来说很有效。
I'm also using version 3.8.2 of the Django Rest Framework. 我还使用了Django Rest Framework的3.8.2版本。
Example: 例:
class BidSerializer(serializers.HyperlinkedModelSerializer):
id = serializers.HyperlinkedRelatedField(view_name='bid-detail', read_only=True)
def __init__(self, *args, **kwargs):
super(BidSerializer, self).__init__(*args, **kwargs)
request_user = self.context['request'].user
self.fields['my_items'].child_relation.queryset = Item.objects.filter(owner=request_user)
self.fields['others_items'].child_relation.queryset = Item.objects.exclude(owner=request_user)
self.fields['user'].queryset = User.objects.filter(username=request_user)
class Meta:
model = Bid
fields = ('id', 'comment', 'user', 'others_items', 'my_items', 'timestamp')
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