前面介绍了DRF搭建的各个功能的实现，本章介绍如何新建一个包含前面所有功能的DRF框架

开始：

第一步：新建一个django项目，新建一个app，配置settings

新建app：python manage.py startapp apptext

配置settings：

在settings后面加入drf相关配置

# rest framework的相关配置
REST_FRAMEWORK = {
    'DEFAULT_PERMISSION_CLASSES': [
        # 配置此项为，只有登录认证的管理员才可以访问数据
        'rest_framework.permissions.IsAdminUser',
        # 配置此项为，任何人都可访问数据，但只有管理员才可增加修改数据
        # 'rest_framework.permissions.DjangoModelPermissionsOrAnonReadOnly'
    ],
    'DEFAULT_SCHEMA_CLASS': 'rest_framework.schemas.coreapi.AutoSchema'
}

第二步：新建模型

from django.db import models

class Teacher(models.Model):
    name = models.CharField(max_length=32)
    age = models.IntegerField()
    # 将老师与后台管理员进行绑定，后台管理员与老师是一对多关系
    permission = models.ForeignKey('auth.User', on_delete=models.CASCADE)
    def __str__(self):
        return self.name

class Student(models.Model):
    name = models.CharField(max_length=32)
    age = models.IntegerField()
    # 假设每个学生只有一个老师，老师和学生的关系为 “一对多”
    my_teacher = models.ForeignKey('Teacher', on_delete=models.CASCADE)
    def __str__(self):
        return self.name

迁移模型：

python manage.py makemigrations
python manage.py migrate

第三步：在app中新建一个serializers序列化器

from rest_framework import serializers
from apptext.models import Teacher, Student

class TeacherSer(serializers.ModelSerializer):
    # 显示所属组的名称
    permission = serializers.ReadOnlyField(source='permission.username')
    class Meta:
        model = Teacher
        fields = '__all__'

class StudentSer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = Student
        fields = '__all__'

第四步：创建views视图

方法一：

from rest_framework import generics, permissions
from apptext.models import Teacher, Student
from apptext.serializers import TeacherSer, StudentSer
from rest_framework.decorators import api_view
from rest_framework.response import Response
from rest_framework.reverse import reverse

class TeacherLC(generics.ListCreateAPIView):
    queryset = Teacher.objects.all()
    serializer_class = TeacherSer
    permission_classes = (permissions.IsAuthenticated, )

class TeacherRUD(generics.RetrieveUpdateDestroyAPIView):
    queryset = Teacher.objects.all()
    serializer_class = TeacherSer
    permission_classes = (permissions.IsAuthenticated, )

class StudentLC(generics.ListCreateAPIView):
    queryset = Student.objects.all()
    serializer_class = StudentSer
    permission_classes = (permissions.IsAuthenticated, )

class StudentRUD(generics.RetrieveUpdateDestroyAPIView):
    queryset = Student.objects.all()
    serializer_class = StudentSer
    permission_classes = (permissions.IsAuthenticated, )

@api_view(['GET'])
def api_root(request, format=None):
    return Response({
        'teachers': reverse('teacher-list', request=request, format=format),
        'students': reverse('student-list', request=request, format=format)
    })

方法二：

from text.serializers import UserSer, SensorSer
from text.models import User, Sensor
from text.permissions import IsOwnerOrReadOnly
from rest_framework import viewsets, permissions

class UserViewSet(viewsets.ModelViewSet):
    queryset = User.objects.all()
    serializer_class = UserSer
    permission_classes = (permissions.IsAuthenticated, IsOwnerOrReadOnly)

class SensorViewSet(viewsets.ModelViewSet):
    queryset = Sensor.objects.all()
    serializer_class = SensorSer
    permission_classes = (permissions.IsAuthenticated, )

法一法二任选其一

第五步：编辑urls

法一：

为方便后期开发，在app中新建一个appurls.py

from django.conf.urls import url
from apptext.views import TeacherLC, TeacherRUD, StudentLC, StudentRUD

urlpatterns = [
    url(r'^tl/$', TeacherLC.as_view(), name='teacher-list'),
    url(r'^tl/(?P<pk>[0-9]+)/$', TeacherRUD.as_view(), name='teacher-detail'),
    url(r'^sl/$', StudentLC.as_view(), name='student-list'),
    url(r'^sl/(?P<pk>[0-9]+)/$', StudentRUD.as_view(), name='student-detail'),
]

第六步：新建管理员用户

python manage.py createsuperuser

第七步：新建权限

在app中新建permissions.py

from rest_framework import permissions
 
class IsOwnerOrReadOnly(permissions.BasePermission):
    """
    自定义权限只允许对象的所有者编辑它。
    """
 
    def has_object_permission(self, request, view, obj):
        # 读取权限允许任何请求，
        # 所以我们总是允许GET，HEAD或OPTIONS请求。
        if request.method in permissions.SAFE_METHODS:
            return True
 
        # 只有该数据的所有者才允许写权限。
        return obj.permission == request.user

在views视图中增加权限

第八步：新增api文档,配置主urls

from django.contrib import admin
from django.urls import path, include
from apptext import appurls
from rest_framework.schemas import get_schema_view
from rest_framework.documentation import include_docs_urls

schema_view = get_schema_view(title='Pastebin API')

urlpatterns = [
    path('admin/', admin.site.urls),
    path('api/', include(appurls)),

    path('schema/', schema_view),
    path('docs/', include_docs_urls("林应权的API文档")),
    # rest登录窗口
    path('api-auth/', include('rest_framework.urls', namespace='rest_framework')),
]

法二的url配置：

from django.contrib import admin
from django.conf.urls import url, include
from text.views import UserViewSet, SensorViewSet
from rest_framework.routers import DefaultRouter
from rest_framework.documentation import include_docs_urls

router = DefaultRouter()
router.register(r'user', UserViewSet)
router.register(r'sensor', SensorViewSet)

urlpatterns = [
    url('admin/', admin.site.urls),
    url('api/', include(router.urls)),

    url('docs/', include_docs_urls('文档')),

    url('api-auth/', include('rest_framework.urls', namespace='rest_framework')),
]

大功告成