02 Django basic introduction to Django

Django Introduce

• • • Preface
    • brief introduction
    • characteristic
    • • 1） Heavyweight framework
      • 2 ) MVT Pattern

Preface

• This article is about writing Django

brief introduction

• Django Yes, it is python Open source for language writing web Development framework , And follow MVC Design . It was originally designed for news sites with rapid development needs , The purpose is to achieve simple and fast website development .
• Django The main purpose of is to be simple 、 Fast development of database driven websites . It emphasizes code reuse , Multiple components can be easily used to “ plug-in unit ” Form serves the whole framework ,Django There are many powerful third-party plug-ins , You can even easily develop your own toolkit · This makes Django It has strong expandability · It also emphasizes rapid development and DRY（DoNotRepeatYoursel） principle .

characteristic

1） Heavyweight framework

• contrast Flask frame ,Django Native provides many functional components , Make development easier and faster .

  • Provides automated scripting tools for project management
  • database ORM Support （ Object relation mapping , English ：Object Relational Mapping）
  • Templates · Forms
  • Admin Manage site
  • file management · Authentication authority
  • session Mechanism
  • cache

2 ) MVT Pattern

• There is a programming pattern called MVC, Its core idea is division of labor 、 decoupling , Reduce coupling between different code blocks , Enhance code scalability and portability , Backward compatibility .
• MVC Mode description
  

• M Put it all together Model, It mainly encapsulates the access to the database layer , Add data in the database 、 Delete 、 Change 、 Check operation .
• V Put it all together View, Used to encapsulate results , Generate page displayed html Content ：
• C Put it all together Controller, For receiving requests , Process business logic , And Model and View Interaction , Return results .

• DjangoMVT
  

• M Put it all together Model, And MVC Medium M Function the same , Responsible for interacting with database , Data processing .
• V Put it all together View, And MVC Medium C Function the same , Receiving request , Conduct business processing , Back to answer .
• T Put it all together Template, And MVC Medium V Function the same , Responsible for encapsulating the returned html：