在django-rest-framework中创建休息api与关系 [英] create a rest api in django-rest-framework with relation

问题描述

在django-rest-framework中创建休息api $ /

我有2个表

拳头表：用户

  id | PK 
名称| varchar（255）
  

第二表：地址

  id | PK 
地址| varchar（255）
 city_id | int 
 user_id | FK 
  

现在，当我用户命中查询时，我也希望以Json格式使用用户地址

像这样

  [
 {
id： 98，
name：[e-mail]，
 
address：[
 {
id：51，
 city_id：5，
addrss：纽约，
}，
 {
id：61，
city_id 
addrss：California，
}，
] 
} 
] 
  

解决方案

models.py -

  class User（models.Model）：
 catcher_fname = models.CharField（max_length = 128，blank = True）
 catcher_lname = models.CharField（max_length = 128，blank = True）
 api_key = models.CharField（max_length = 100，blank = False）
 
 
 
 class地址（models.Model）：
 address = models.CharField（max_length = 150） 
 city = models.Ch arField（max_length = 255）
 user = models.ForeignKey（User，on_delete = models.CASCADE，related_name ='addresses'）
  

注意 - id字段是自动增量和内置django，您不需要直接指定。
以下是演示如何链接您的用户obj和地址obj。

 >>来自.models import User，Address 
>> user_obj = User.objects.get（pk = pk）
>> address_obj = Address.objects.get（pk = address_pk）
>> user_obj.address = address_obj 
>> user_obj.save（）
  

稍后，您可以从用户对象访问地址，如 -

 >>来自.models import User 
>> user_obj = User.objects.get（pk = pk）
>> user_obj.addresses.all（）（将给出数据）
  

现在安装django-restframework

views.py -

  from rest_framework.generics import RetrieveAPIView 
 from .serializers import UserDetailSerializer 
 
 
 class UserAPIView（RetrieveAPIView）：
 serializer_class = UserDetailSerializer 
 lookup_field = 'id'
 queryset = User.objects.all（）
  

序列化程序。从

  from .models import User，Address 
 from rest_framework import serializers 
 
 
 class AddressSerializer（serializers.ModelSerializer）：
 class Meta：
 model = Address 
 fields =（'id'，'city_id'，'address'）
 
 class UserDetailSerializer（serializers.ModelSerializer）：
 address = AddressSerializer（many = True）
 class Meta：
 model = Use r 
 fields =（
'id'，
'name'，
'address'
）
  

urls.py

  django.conf.urls import url 
 $ b来自reports.views import import UserAPIView 
 
 urlpatterns = [
 url（r'^ users /（？P< id> 0-9] +）/ $'，UserAPIView.as_view（），name ='users'），
] 
  

create a rest api in django-rest-framework

I have 2 tables

Fist table: User

id   | PK
Name | varchar(255)

Second table: address

id      | PK
address | varchar(255)
city_id | int
user_id | FK

Now when i hit query on User I also want user address in Json format

Like this

[
  {
    "id": 98,
    "name": "[e-mail]",

    "address": [
      {
        "id": 51,
        "city_id": 5,
        "addrss": "New York",
      },
      {
        "id": 61,
        "city_id": 5,
        "addrss": "California",
      },
    ]
  }
]

解决方案

models.py-

class User(models.Model):
    catcher_fname = models.CharField(max_length = 128, blank = True)
    catcher_lname = models.CharField(max_length = 128, blank = True)
    api_key = models.CharField(max_length = 100, blank = False)



class Address (models.Model):
    address = models.CharField(max_length = 150)
    city = models.CharField(max_length = 255)
    user = models.ForeignKey(User,on_delete=models.CASCADE,related_name='addresses')

Note - id field is autoincrementing and in-built in django, you don't need to specify it directly. Following is a demonstration how should you link your user obj and address obj.

>> from .models import User,Address
>> user_obj = User.objects.get(pk=pk)
>> address_obj = Address.objects.get(pk=address_pk)
>> user_obj.address = address_obj
>> user_obj.save()

Later you can access the address from the user object as -

>> from .models import User
>> user_obj = User.objects.get(pk=pk)
>> user_obj.addresses.all() (will give the data)

Now install django-restframework

views.py -

from rest_framework.generics import RetrieveAPIView
from .serializers import UserDetailSerializer


class UserAPIView(RetrieveAPIView):
      serializer_class = UserDetailSerializer
      lookup_field = 'id'
      queryset = User.objects.all()

serializers.py -

from .models import User,Address
from rest_framework import serializers


class AddressSerializer(serializers.ModelSerializer):
    class Meta:
        model = Address
        fields = ('id', 'city_id', 'address')

class UserDetailSerializer(serializers.ModelSerializer):
    address = AddressSerializer(many=True)
    class Meta:
           model = User
           fields = (
              'id',
              'name',
              'address'
           )

urls.py

from django.conf.urls import url

from reports.views import UserAPIView

urlpatterns = [
    url(r'^users/(?P<id>[0-9]+)/$',UserAPIView.as_view(), name= 'users'),
]

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