Getting Started with Django Framework 1.0

Development tools: PyCharm community version or professional version CMD command line

The difference between the community version and the professional version is that the professional version can directly create Django projects , while the Community Edition needs to be created manually. Since we are all just getting started, it is better for us to create it manually, which will help us become familiar with Django commands and related operations.

Create a new Django minimal program

Create a new Web framework project

We use the command line interface to enter the directory where we want to create the project, and then enter the following command:

django-admin startproject mysite

The django-admin here is a tool for managing django. When we install django, dependencies will be installed by default. mysite is the project name and can be modified according to your own needs. After creation, we will get the following directory structure:

Modify the project and add Function

We need to add specific application here, and add related functions by configuring routing mapping.

What is the relationship between project and app?

• The project corresponds to a website, which is a collection of configurations and applications.
• Applications correspond to specific functions, which are specific Function carrier
• Separation of configuration and function is a manifestation of high modularity

1. [Modify project] Create a specific application (app)

Command: python manage.py startapp helloapp

After the command execution is completed, A new directory helloapp will be created under the root directory

2. 【Modify Project】Modify the application's views.py

   <code class="hljs"><span class="hljs-comment"># Create your views here.</span><br/><span class="hljs-keyword">from</span> django.http <span class="hljs-keyword">import</span> HttpResponse<br/><br/><span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">hello</span><span class="hljs-params">(request)</span>:</span><br/><span class="hljs-keyword">return</span> HttpResponse(<span class="hljs-string">"Hello World! I am coming..."</span>)<br/></code>

3. 【Modify the project】Modify the URL routing

   in conjunction with the project name The path relationship between the URL and the processing function is specified in the urls.py file in the corresponding directory.

   <code class="hljs"><span class="hljs-keyword">from</span> django.contrib <span class="hljs-keyword">import</span> admin<br/><span class="hljs-keyword">from</span> django.urls <span class="hljs-keyword">import</span> include, path<br/><span class="hljs-keyword">from</span> helloapp <span class="hljs-keyword">import</span> views      <span class="hljs-comment"># from the subapp import related views</span><br/><br/>urlpatterns = [                 <span class="hljs-comment"># config the routes like vue&#39;s vue-router</span><br/>    path(<span class="hljs-string">&#39;admin/&#39;</span>, admin.site.urls),<br/>    path(<span class="hljs-string">&#39;index/&#39;</span>, views.hello),<br/>]<br/></code>

   We first need to introduce the views file under the corresponding app, and then configure the routing correspondence

4. [Modification Project] Modify URL routing

   path('index/', views.hello)

   The first parameter here represents the url address, and what we have here will respond to domain name/index/ Access to this path; The second parameter indicates specifying a certain processing function, for example, here we have formulated views.hello.

   

##Run the project

python manage.py runserver

What I have to saydjango-admin andmanage.py

django-admin

`python manage.py startapp hello2app`

```python
# hello2app/views.py
from django.shortcuts import render
def hello(request):
    return render(request, "PYC01-HTMLJSDemo.html")
```

这里，`render()` 是一个打包函数，第一个参数是 request， 第二个参数是要返回的模板页面。