作者：桃子
本文分为两部分，一是搭建django接口开发环境，二是接口测试，接口测试分别介绍了使用postman工具测试、Request+Unittest测试和Drango自带测试模块
一 django接口开发
Django 安装
实践：输入 django-admin.py 运行成功
drango rest framework 安装
项目创建
d 盘创建新项目
命令：django-admin startproject django_restful
django_restful 项目中创建 api 应用
命令：python manage.py startapp api
进入 D:\django_restful\django_restful 目录下，打开 setting.py 文件创建 api 和 rest_framework
配置 rest_framewor 权限
在 setting.py 文件末尾添加权限代码：
REST_FRAMEWORK = {
'DEFAULT_PERMISSION_CLASSES': [
'rest_framework.permissions.IsAuthenticated',
]
}
数据库迁移
cmd下输入命令： python manage.py migrate
提示如下图迁移成功
创建超级管理员
cmd下输入命令： python manage.py createsuperuser
依次输入账号、邮箱、密码，如下图
启动server
启动django ，登录创建的用户python manage.py runserver
浏览器输入地址：http://127.0.0.1:8000/
登录超级管理员账户
浏览器输入地址：http://127.0.0.1:8000/admin
输入账号、密码后登录
数据序列化
在API文件夹下新建serializers.py文件，定义API返回形式，返回哪些字段，返回怎样的格式等
代码：
# from django.contrib.auth.models import User,Group
from rest_framework import serializers
from api.models import User,Group
class UserSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model=User
fields=('url','username','email','groups')
class GroupSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model=Group
fields=('url','name')
创建视图
Django rest framework 使用ViewSets定义视图的展现形式，如何向用户展示数据，展示什么数据等
在 Api下vies.py文件编写如下代码
from django.shortcuts import render
# from django.contrib.auth.models import User,Group
from rest_framework import viewsets
from api.serializers import UserSerializer,GroupSerializer
from api.models import User,Group
# Create your views here.
class UserViewSet(viewsets.ModelViewSet):
"""
retrieve:
Return a user instance.
list:
Return all users,odered by most recent joined.
create:
Create a new user.
delete:
Remove a existing user
partial_update:
Update one or more fields on a existing user.
update:
Update a user.
"""
queryset = User.objects.all()
serializer_class = UserSerializer
class GroupViewSet(viewsets.ModelViewSet):
"""
retrieve:
Return a group instance.
list:
Return all groups, ordered by most recently joined.
create:
Create a new group.
delete:
Remove an existing group.
partial_update:
Update one or more fields on an existing group.
update:
Update a group.
"""
queryset = Group.objects.all()
serializer_class = GroupSerializer
URL路由配置
打开django_restful/urls.py文件，填写下面的代码配置路由
"""django_restful URL Configuration
The `urlpatterns` list routes URLs to views. For more information please see:
https://docs.djangoproject.com/en/2.0/topics/http/urls/
Examples:
Function views
1. Add an import: from my_app import views
2. Add a URL to urlpatterns: path('', views.home, name='home')
Class-based views
1. Add an import: from other_app.views import Home
2. Add a URL to urlpatterns: path('', Home.as_view(), name='home')
Including another URLconf
1. Import the include() function: from django.urls import include, path
2. Add a URL to urlpatterns: path('blog/', include('blog.urls'))
"""
from django.contrib import admin
from django.urls import path
from django.conf.urls import include
from rest_framework import routers
from api import views
#from rest_framework.schemas import get_schema_view
#from rest_framework_swagger.renderers import SwaggerUIRenderer,OpenAPIRenderer
#schema_view=get_schema_view(title='API',renderer_classes=[OpenAPIRenderer,SwaggerUIRenderer])
router=routers.DefaultRouter()
router.register(r'users',views.UserViewSet)
router.register(r'groups',views.GroupViewSet)
urlpatterns = [
path('admin/', admin.site.urls),
path('',include(router.urls)),
path('api-auth/',include('rest_framework.urls',namespace='rest_framework')),
path('docs/',schema_view,name='docs')
]
cmd下重新启动服务：python manage.py runserver
# from django.contrib.auth.models import User,Group
from rest_framework import serializers
from api.models import User,Group
class UserSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model=User
fields=('url','username','email','groups')
class GroupSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model=Group
fields=('url','name')
打开API主页
Swagger 接口文档生成
Swagger是一个框架，是一个restful风格的web服务，每次接口有变动，接口文档也会自动更新
django接入swagger
cmd 安装swagger ：pip install django-rest-swagger
打开 setting.py 文件，添加django-rest-swagger应用
打开views.py 填写如下代码：
from django.shortcuts import render
from django.contrib.auth.models import User,Group
from rest_framework import viewsets
from api.serializers import UserSerializer,GroupSerializer
#from api.models import User,Group
# Create your views here.
class UserViewSet(viewsets.ModelViewSet):
"""
retrieve:
Return a user instance.
list:
Return all users,odered by most recent joined.
create:
Create a new user.
delete:
Remove a existing user
partial_update:
Update one or more fields on a existing user.
update:
Update a user.
"""
queryset = User.objects.all()
serializer_class = UserSerializer
class GroupViewSet(viewsets.ModelViewSet):
"""
retrieve:
Return a group instance.
list:
Return all groups, ordered by most recently joined.
create:
Create a new group.
delete:
Remove an existing group.
partial_update:
Update one or more fields on an existing group.
update:
Update a group.
"""
queryset = Group.objects.all()
serializer_class = GroupSerializer
打开url.py 添加如下代码
"""django_restful URL Configuration
The `urlpatterns` list routes URLs to views. For more information please see:
https://docs.djangoproject.com/en/2.0/topics/http/urls/
Examples:
Function views
1. Add an import: from my_app import views
2. Add a URL to urlpatterns: path('', views.home, name='home')
Class-based views
1. Add an import: from other_app.views import Home
2. Add a URL to urlpatterns: path('', Home.as_view(), name='home')
Including another URLconf
1. Import the include() function: from django.urls import include, path
2. Add a URL to urlpatterns: path('blog/', include('blog.urls'))
"""
from django.contrib import admin
from django.urls import path
from django.conf.urls import include
from rest_framework import routers
from api import views
from rest_framework.schemas import get_schema_view
from rest_framework_swagger.renderers import SwaggerUIRenderer,OpenAPIRenderer
schema_view=get_schema_view(title='API',renderer_classes=[OpenAPIRenderer,SwaggerUIRenderer])
router=routers.DefaultRouter()
router.register(r'users',views.UserViewSet)
router.register(r'groups',views.GroupViewSet)
urlpatterns = [
path('admin/', admin.site.urls),
path('',include(router.urls)),
path('api-auth/',include('rest_framework.urls',namespace='rest_framework')),
path('docs/',schema_view,name='docs')
]
启动服务，浏览器打开网址http://127.0.0.1:8000/docs/
界面如下：
三 Restful 接口测试
可以使用工具测试如postman或者jmeter，也可以通过request+unittest脚本测试
测试场景：
正常测试：数据的增删改查
异常测试：未授权，参数异常等
postman测试
1. user接口
查询功能
get方法
url输入http://127.0.0.1:8000/users
授权：authorization选择basic auth，输入账户、密码
点击send
send结果：
创建用户
POST方法
url输入/http://127.0.0.1:8000/users
授权：authorization选择basic auth，输入账户、密码
body下输入username 33333
点击send
修改用户
修改ueser id为2的用户名改为lbz
PATCH 方法
url输入/http://127.0.0.1:8000/users/2/
授权：authorization选择basic auth，输入账户、密码
body下输入username lbz
点击send
删除测试
删除ueser id为3的用户
PATCH 方法
url输入/http://127.0.0.1:8000/users/3/
授权：authorization选择basic auth，输入账户、密码
点击send
未授权测试
输入路径如http://127.0.0.1:8000/users/
不授权，点击send，提示如下
脚本测试
Request+Unittest测试
在API目录下新建test_unittest.py,输入下面代码，实现增删改查功能
#-*-coding:GBK -*-
import requests
import unittest
class UserTest(unittest.TestCase):
def setUp(self):
self.base_url='http://127.0.0.1:8000/users'
self.auth=('51zxw','51zxw20182018')
#查询功能
def test_get_user(self):
r=requests.get(self.base_url+'/1/',auth=self.auth)
result=r.json()
self.assertEqual(result['username'],'51zxw')
self.assertEqual(result['email'],'51zxw@163.com')
#添加功能
def test_add_user(self):
form_data={'username':'add1','email':'666@162.com','groups':'http://127.0.0.1:8000/groups/2/'}
r=requests.post(self.base_url+'/',data=form_data,auth=self.auth)
result=r.json()
self.assertEqual(result['username'],'add1')
#修改功能
def test_update_user(self):
form_data={'email':'update@162.com'}
r=requests.patch(self.base_url+'/2/',data=form_data,auth=self.auth)
result=r.json()
self.assertEqual(result['email'],'update@162.com')
#删除功能
def test_delete_user(self):
r=requests.delete(self.base_url+'/3/',auth=self.auth)
self.assertEqual(r.status_code,404)
#无授权
def test_no_auth(self):
r=requests.get(self.base_url)
result=r.json()
self.assertEqual(result['detail'],'Authentication credentials were not provided.')
if __name__=='_main_':
unittest.main()
Drango自带测试模块
打开API目录下新建tests文件输入下面代码，实现增删改查功能
#-*-coding:GBK -*-
from django.test import TestCase
import requests
class UserTest(TestCase):
def setUp(self):
self.base_url='http://127.0.0.1:8000/users'
self.auth=('51zxw','51zxw20182018')
#查询功能
def test_get_user(self):
r=requests.get(self.base_url+'/1/',auth=self.auth)
result=r.json()
self.assertEqual(result['username'],'51zxw')
self.assertEqual(result['email'],'51zxw@163.com')
#添加功能
def test_add_user(self):
form_data={'username':'add1','email':'666@162.com','groups':'http://127.0.0.1:8000/groups/2/'}
r=requests.post(self.base_url+'/',data=form_data,auth=self.auth)
result=r.json()
self.assertEqual(result['username'],'add1')
#修改功能
def test_update_user(self):
form_data={'email':'update@162.com'}
r=requests.patch(self.base_url+'/2/',data=form_data,auth=self.auth)
result=r.json()
self.assertEqual(result['email'],'update@162.com')
#删除功能
def test_delete_user(self):
r=requests.delete(self.base_url+'/3/',auth=self.auth)
self.assertEqual(r.status_code,404)
#无授权
def test_no_auth(self):
r=requests.get(self.base_url)
result=r.json()
self.assertEqual(result['detail'],'Authentication credentials were not provided.')
运行：
cmd下：python manage.py test
查看结果：
浏览器输入路径查看：http://127.0.0.1:8000/users/
