Intro

backend Django：负责talk to database，提供internal API over network, e.g. 127.0.0.1/api/login/，可以附上parameter ?user=diane，consumed by frontend。Django这里提供的所有内容都是与前端talk的，它的url不对外。

frontend React：负责render website，跳转的逻辑，以及consume backend API data。

Setup

Reference

1. 最外层是一个django project：django-admin startproject project

   1. project/project/settings.py: 这个project的总设定。在settings.py中register你的app，比如frontend, backend, 以及依赖的package, 比如rest_framework
   2. project/project/urls.py：这个project总的url指向。有admin的，（等设定后）有backend的internal api url，也有给user看的frontend url. Only points to urls of each app, let each app handle internal logic: path(‘something’, include(“backend.urls”))

2. 开始一个backend app: django-admin startapp backend

   1. models.py：设置你的models
   2. serializers.py：api如何jsonify各种models
   3. views.py：api的内部逻辑。需要哪个model的数据，要多少，怎么传回。这里的class被urls.py调用，作为views.<your-class-name>.as_view()
   4. urls.py：对内提供的api endpoint
   5. 在project/中python3 manage.py runserver。开始测试或prodution

3. 开始一个frontend app: django-admin startapp frontend

   1. 在这里手动配置React的依赖。需要用webpack帮忙generate main.js。我其实并不太懂...步骤比较复杂，详细看reference。似乎也可以用create-react-app...（那样访问的应该就是127.0.0.1:3000 hosted by react）大致步骤：
      1. initialize packages.json (project对npm的package dependency)的地方run npm init -y
      2. npm install webpack
      3. config webpack dev/production build command in package.json
      4. npm install babel related, config .babelrc
      5. npm install react related
      6. config webpack.config.js to use babel, css, file loader.
   2. frontend/urls.py: route url to views, e.g. path(‘’, views.index)
   3. frontend/views.py: handle request and render, e.g. return render(request, ‘frontend/index.html’)
   4. frontend/src/components: 所有components的js,css
   5. frontend/src/index.js: js entry point of your frontend
   6. frontend/static/frontend/main.js: generated by webpack
   7. frontend/templates/frontend/index.html: html entry point of your frontend