官术网_书友最值得收藏!

Summary

In this chapter, we learned about the three main components of Django: the view, model and template. We wrote data models to store the data of our application, and then created views and templates to display this data. We also learned how to map URLs to views, and how to use the interactive console to experiment with our Django project.

Below is a summary of the Django features covered in this chapter:

  • To create an application within a project, run the following command:
    $ python manage.py startapp <app-name>
  • After writing a data model, the following command should be run to create the corresponding tables in the database:
    $ python manage.py syncdb
  • To view the SQL queries generated by Django, issue the following command:
    $ python manage.py sql <app-name>
  • Data models provide a variety of methods to interact with the database engine:
    • The save method saves an object into the database.
    • The objects.get method retrieves an object by a unique field.
    • The objects.all method retrieves a list of all objects.
    • The delete method deletes an object from the database.
  • To generate a 404 "Page Not Found" error, raise an exception of type type Http404.

In the next chapter, we will continue developing our application, but we will focus mostly on user management features, such as registration and logging in. The next chapter provides a lot of useful information, so read on!

主站蜘蛛池模板: 阿勒泰市| 遵化市| 金平| 盘山县| 安塞县| 韩城市| 乌恰县| 中方县| 曲麻莱县| 团风县| 英超| 东丽区| 达州市| 浑源县| 綦江县| 沙田区| 苍溪县| 沿河| 全州县| 大新县| 陇西县| 琼结县| 宁波市| 积石山| 潢川县| 德保县| 耿马| 新闻| 康乐县| 珠海市| 许昌县| 肇州县| 北安市| 青海省| 娄底市| 盐亭县| 高雄县| 华阴市| 长宁县| 曲麻莱县| 周宁县|