![](/img/trans.png)
[英]How to send manytomany field to Django rest framework using HTTP request in flutter
[英]How to add data to ManyToMany field using Django Rest Framework?
我對 DJango 比較陌生,我希望使用 rest 框架中的序列化程序將數據添加到多對多字段。
我的 Model:
class IngFamily(models.Model):
name=models.CharField(max_length=30, unique=True, verbose_name='ingredient parent')
class UserProfile(models.Model):
user=models.ForeignKey(User)
allergies=models.ManyToManyField(IngFamily, verbose_name='allergies', null=True)
現在,我想使用 rest api 將數據添加到 UserProfile model。
我環顧四周,但找不到很多地方。
到目前為止,我所取得的成就:
序列化器:
class IngFlySerializer(serializers.ModelSerializer):
class Meta:
model = IngFamily
fields= ('name',)
class UserProfileSerializer(serializers.ModelSerializer):
allergies=IngFlySerializer(many=True,)
class Meta:
model = UserProfile
fields=('allergies',)
def create(self, validated_data):
allergies_data =validated_data.pop('allergies', [])
#import pdb;pdb.set_trace()
user1=UserProfile.objects.create(**validated_data)
for allergy in allergies_data:
al=IngFamily.objects.filter(name=allergy.get('name'))
#al.name=allergy.get('name')
user1.allergies.add(al)
user1.save()
return user1
當我嘗試使用它時,“al”為空。
看法:
class user_profile(generics.ListCreateAPIView):
serializer_class = UserProfileSerializer
permission_classes = (permissions.IsAuthenticated,)
def get_queryset(self):
user = self.request.user
return UserProfile.objects.filter(user=user)
def perform_create(self, serializer):
#import pdb; pdb.set_trace()
serializer.save(user=self.request.user)
class UserDetail(generics.RetrieveDestroyAPIView):
serializer_class = UserProfileSerializer
permission_classes = (permissions.IsAuthenticated,)
def get_queryset(self):
user1 = self.request.user
return UserProfile.objects.filter(user=user1)
我的 Post 請求看起來像這樣:
{"allergies": [{"name": ["Beef"]},{"name": ["Pork"]}]}
我已經堅持了一段時間,任何幫助將不勝感激:)
可以嘗試幾件事:
def create(self, validated_data):
allergies_data =validated_data.pop('allergies')
user1=UserProfile.objects.create(**validated_data)
user1.save()
for allergy in allergies_data:
al=IngFamily.objects.get_or_create(name=allergy['name'])
user1.allergies.add(al)
return user1
首先,post請求中沒有數據格式是錯誤的:
它應該如下:
{"allergies": [{"name": "Beef"},{"name": "Pork"}]}
現在讓我們在您的序列化程序中修改您的def create()
def create(self, validated_data):
allergies_data =validated_data.pop('allergies', [])
names = [allergy.get('name') for allergy in allergies_data if allergy]
al = IngFamily.objects.filter(name__in=names) # using names(list) for filtering by __in
user1 = UserProfile.objects.create(**validated_data)
user1.allergies.add(*al) # notice there have * before "al" (as we are putting list inside add()
# user1.save() # we don't need to call `save()` as we are updating ManyToMany field.
return user1
使用類似的東西:
class ProjectSerializer(serializers.ModelSerializer):
tag= serializers.StringRelatedField(many=True)
class Meta:
model = Song
fields = '__all__'
這是一個參考文檔 - https://www.django-rest-framework.org/api-guide/relations/
您應該在循環中使用 but.save() 並將您的查詢編輯為:
定義創建(自我,驗證數據):
allergies_data =validated_data.pop('allergies', [])
user1=UserProfile.objects.create(**validated_data)
for allergy in allergies_data:
al=IngFamily.objects.get(name=allergy['name'])
user1.allergies.add(al)
#here you should add it
user1.save()
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.