Django+rest_framework+drf_yasg 生成swaggers在线API文档

Django+rest_framework+drf_yasg 生成swaggers在线API文档
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背景

最近有了给API平台自动生成接口文档的需求，但是我们的API平台没有使用Django的models，而且代码结构也不想做大的改动。经过调研，最后决定采用Django+rest_framework+drf_yasg的方法，最后实现出来很简单。但调研过程中因为自己对Django体系的不熟悉，网上很多文档又没有系统的描述在不使用models与serializers的情况下，如何使用swaggers生成文档，特别是API参数如何在文档中生自动显示，在文档界面如何给API传参等问题，并没有具体的描述（也有可能是我没有找到，或者没有看懂）

技术路线

from drf_yasg.utils import swagger_auto_schema

@swagger_auto_schema

相关版本

python：2.7.13

Django==1.11.16

drf-yasg==1.11.0

djangorestframework==3.7.7

user_agents==1.1.0

swagger-spec-validator==2.1.0

flex==6.11.1

django-cors-headers==2.1.0

如果还缺什么包，可以参考:https://github.com/axnsan12/drf-yasg/tree/master/requirements

中：base.txt，testproj.txt，validation.txt

第一步：新建一个Django项目

• django-admin.py startproject DjangoDrfTest

第二步：新建一个APP

• python manage.py startapp news

目录结构如下：

第三步：修改settings.py

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    "news",
    #"corsheaders",
    'rest_framework',
    "drf_yasg"
]
SWAGGER_SETTINGS = {
    'LOGIN_URL': '/admin/login',
    'LOGOUT_URL': '/admin/logout',
    'PERSIST_AUTH': True,
    'REFETCH_SCHEMA_WITH_AUTH': True,
    'REFETCH_SCHEMA_ON_LOGOUT': True,

    'DEFAULT_INFO': 'DjangoDrfTest.urls.swagger_info',#这里注意，更改DjangoDrfTest

    'SECURITY_DEFINITIONS': {
        'Basic': {
            'type': 'basic'
        },
        'Bearer': {
            'type': 'apiKey',
            'name': 'authorization',
            'in': 'header'
        },
        'Query': {
            'type': 'apiKey',
            'name': 'auth',
            'in': 'query'
        }
    }
}

第四步：修改news/下修改views.py

# -*- coding: utf-8 -*-
import sys

reload(sys)
sys.setdefaultencoding("utf8")
sys.path.append('../')
# from __future__ import unicode_literals
from django.shortcuts import render
from drf_yasg.utils import swagger_auto_schema
from drf_yasg import openapi
from rest_framework.views import APIView
import json
from django.http import JsonResponse
from pymongo import MongoClient

conn = MongoClient(host='192.168.*****', port=*****)
# 连接数据库
db = conn['test']
table = db['data']


def get_request_args(func):
    def _get_request_args(self, request):
        if request.method == 'GET':
            args = request.GET
        else:
            body = request.body
            if body:
                try:
                    args = json.loads(body)
                except Exception as e:
                    print e
                    # return makeJsonResponse(status=StatusCode.EXECUTE_FAIL, message=str(e))
                    args = request.POST
            else:
                args = request.POST
        return func(self, request, args)

    return _get_request_args


# Create your views here.
class GetOneNews(APIView):
    '''
    list:
        Return one news
    '''
    test_param = openapi.Parameter("id", openapi.IN_QUERY, description="test manual param",
                                   type=openapi.TYPE_INTEGER)

    @swagger_auto_schema(operation_description="partial_update description override",
                         responses={404: 'id not found'},
                         manual_parameters=[test_param])
    @get_request_args
    def get(self, request, args):
        data = []
        id = args.get("id")
        i = table.find_one({"_id": int(id)})
        data.append({'user_name': i.get("user_name"), "content": i.get("content")})
        return JsonResponse({"data": data})


    @swagger_auto_schema(
        operation_description="apiview post description override",
        request_body=openapi.Schema(
            type=openapi.TYPE_OBJECT,
            required=['id', "user_name"],
            properties={
                'id': openapi.Schema(type=openapi.TYPE_INTEGER),
                'user_name': openapi.Schema(type=openapi.TYPE_STRING)

            },
        ),
        security=[]
    )
    @get_request_args
    def post(self, request, args):
        data = []
        id = args.get("id")
        user_name = args.get("user_name")
        i = table.find_one({"_id": int(id)})
        data.append({'user_name': i.get("user_name"), "content": i.get("content")})
        return JsonResponse({"data": data})
        pass

第五步：news/下新建urls.py并添加以下内容

import sys

reload(sys)
sys.setdefaultencoding('utf-8')
sys.path.append('../')
from django.conf.urls import url
from views import *

urlpatterns = [
    url(r'^getOneNews/?$', GetOneNews.as_view(), name='get_one_news'), 

]

第六步：修改DjangoDrfTest/urls.py

import user_agents
from django.conf.urls import include, url
from django.contrib import admin
from django.shortcuts import redirect
from rest_framework import permissions
from drf_yasg import openapi
from drf_yasg.views import get_schema_view
swagger_info = openapi.Info(
    title="Snippets API",
    default_version='v1',
    description="""This is a demo project for the [drf-yasg](https://github.com/axnsan12/drf-yasg) Django Rest Framework library.

The `swagger-ui` view can be found [here](/cached/swagger).  
The `ReDoc` view can be found [here](/cached/redoc).  
The swagger YAML document can be found [here](/cached/swagger.yaml).  

You can log in using the pre-existing `admin` user with password `passwordadmin`.""",  # noqa
    terms_of_service="https://www.google.com/policies/terms/",
    contact=openapi.Contact(email="[email protected]"),
    license=openapi.License(name="BSD License"),
)

SchemaView = get_schema_view(
    validators=['ssv', 'flex'],
    public=True,
    permission_classes=(permissions.AllowAny,),
)


def root_redirect(request):
    user_agent_string = request.META.get('HTTP_USER_AGENT', '')
    user_agent = user_agents.parse(user_agent_string)

    if user_agent.is_mobile:
        schema_view = 'cschema-redoc'
    else:
        schema_view = 'cschema-swagger-ui'

    return redirect(schema_view, permanent=True)


urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^swagger(?P.json|.yaml)$', SchemaView.without_ui(cache_timeout=0), name='schema-json'),
    url(r'^swagger/$', SchemaView.with_ui('swagger', cache_timeout=0), name='schema-swagger-ui'),
    url(r'^redoc/$', SchemaView.with_ui('redoc', cache_timeout=0), name='schema-redoc'),
    url(r'^redoc-old/$', SchemaView.with_ui('redoc-old', cache_timeout=0), name='schema-redoc-old'),

    url(r'^cached/swagger(?P.json|.yaml)$', SchemaView.without_ui(cache_timeout=None), name='cschema-json'),
    url(r'^cached/swagger/$', SchemaView.with_ui('swagger', cache_timeout=None), name='cschema-swagger-ui'),
    url(r'^cached/redoc/$', SchemaView.with_ui('redoc', cache_timeout=None), name='cschema-redoc'),
    url(r'^$', root_redirect),
    url(r'^news/', include('news.urls', namespace="crawl_config")),

]

第七步：运行managy.py

• python manage.py runserver
• 访问 http://127.0.0.1:8000
• 效果如下图：
  
• 看看测试效果：
  
• Post
• 
• 

一些配置项参数与常用场景的说明

• API通过header apiKey验证或者apiKey在query中，变量的配置位置在settings.py中SWAGGER_SETTINGS配置项中：
  

• @swagger_auto_schema 装饰器要放在所有装饰器的首位

• post方法的参数申明方式：

    swagger_auto_schema(
        operation_description="apiview post description override",
        request_body=openapi.Schema(
            type=openapi.TYPE_OBJECT,
            required=['id', "user_name"],
            properties={
                'id': openapi.Schema(type=openapi.TYPE_INTEGER),
                'user_name': openapi.Schema(type=openapi.TYPE_STRING)

            },
        ),
        security=[]
    )

• get 方法的参数申明方式

    @swagger_auto_schema(operation_description="partial_update description override",
                         responses={404: 'id not found'},
                         manual_parameters=[test_param])

• 关于swagger_auto_schema方法的参数详解，请查看方法中的注解

本篇文章，只是简单的讲解了drf_yasg的简单用法，其中的数据是我的测试数据，数据库使用的是mongodb，网上关于使用models与serializers的方法有很多，在此不做叙述，希望本篇文章可以帮助到你。

参考文章

• https://blog.csdn.net/lmz_lmz/article/details/81028715

• https://blog.csdn.net/weixin_31449201/article/details/81109128

• https://github.com/axnsan12/drf-yasg

• https://drf-yasg.readthedocs.io/en/stable/readme.html

• https://blog.csdn.net/wang785994599/article/details/80799142