就像Youtube一样,我希望看到我的帖子(装备)的类别。
我的方法是......
在建造一个Seriailizer的同时,我觉得我完全是股票。如此令人沮丧...... :(
如果您有任何更好的想法,请随时改变我的方法。
预期的JSON输出位于
之下{
...
"categories": [
{
"id": 1,
"name": "asd"
"added": True <- since the post is added to 'asd'
},
{
"id": 2,
"name": "workout"
"added": True
},
...
{
"id": 5,
"name": "bgm"
"added": False <- since the post is not added to 'bgm'
},
]
}
这是views.py
class OutfitDetailView(generics.RetrieveAPIView):
queryset = Outfit.objects.all()
serializer_class = OutfitDetailSerializer
lookup_field = 'pk'
这是serializers.py(这是一个问题)
class OutfitDetailSerializer(serializers.ModelSerializer):
...
def get_categories(self, obj):
# Right Here! Get whole categories associated with user
all_categories = Category.objects.filter(owner=self.context['request'].user)
# And the categories associated with user AND the post
categories = obj.categories.filter(owner=self.context['request'].user)
return CategorySerializer(categories, many=True).data
class CategorySerializer(serializers.ModelSerializer):
class Meta:
model = Category
fields = (
'id',
'name',
'added' <- here I want to add 'added' field but I don't know how.
)
如果您需要型号
class Outfit(models.Model):
...
user = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, blank=True)
content = models.CharField(max_length=30)
...
class Category(models.Model):
name = models.CharField(max_length=20)
owner = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, blank=True)
outfits = models.ManyToManyField(Outfit, related_name="categories", blank=True)
main_img = models.ImageField(
upload_to=upload_location_category,
null=True,
blank=True)
...
答案 0 :(得分:1)
如果我理解你的错误,你可以尝试:
class OutfitDetailSerializer(serializers.ModelSerializer):
def get_categories(self, obj):
user = self.context['request'].user
categories = Category.objects.filter(owner=user)
added = categories.extra(select={'added': '1'}).filter(outfits__pk=obj.pk)
added = list(added.values('added', 'name', 'id'))
added_f = categories.extra(select={'added': '0'}).exclude(outfits__pk=obj.pk)
added_f = list(added_f.values('added', 'name', 'id'))
categories = added + added_f
return CategorySerializer(categories, many=True).data
请注意values
您需要添加CategorySerializer
class CategorySerializer(serializers.ModelSerializer):
added = serializers.BooleanField()
class Meta:
model = Category
fields = (
'id',
'name',
'added'
)