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This article will explain in detail how to use Django view for you. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

A view function or class, called view for short, is a simple Python function (class) that accepts Web requests and returns a Web response. The response can be a HTML page, a redirect, a 404 error, a xml, json data, or a picture, etc., with the view placed in a file named views.py in the project or application (app) directory

Let's try to write a View view of the function type

From django.shortcuts import renderdef index (request): if request.method = 'POST': pass else: return render (request=request, template_name='index.html', context=None, content_type=None, status=None, using=None) where context is the dictionary content_type setting HTTP response header field, which is used to tell the front end how to parse the page status is the status code. The default is 200. you can customize using to specify the name of the template engine. The default is to use the Django template engine render () function

The syntax is: render (request, template_name, context=None, content_type=None, status=None, using=None)

Request: the request object used to generate this response; the file defined in template_name:templates, pay attention to the path name

Context: to pass in the data in the file for rendering. Default is empty dictionary.

Content_type: the type of MIME to be used in the generated document. The default is the value set by DEFAULT_CONTENT_TYPE.

The response code of status:http. The default is 200.

Using: the name of the template engine used to load the template

After looking at the function view, let's simply take a look at the class view, which has less code than the function view.

Class ProfileView (View): def get (self, request): return render (request, template_name='profile.html') def post (self, request): how to use the pass class view

We use the previous users app example to add a profile.html file to the project (in the templates of the project, the html files are all in this folder), and the effect we want can successfully access / users/profile/

First of all, we need to handle it in the urls.py module in users APP, and we need to import the class ProfileView:

From .views import ProfileViewurl (r'^ profile/$', ProfileView.as_view (), name='profile')

An error will be reported at this time, because we haven't created this class yet, so let's write the ProfileView class in users APP's views.py first.

Class ProfileView (View): def get (self, request): return render (request, 'profile.html', {' name': 'Angle'}) def post (self, request): username = request.POST.get (' username', ") password = request.POST.get ('password',") return render (request,' index.html', {'username': username,' age': 18})

Then randomly use a few sentences of HTML code in the profile.html file you created earlier

Users profile#, I added a color style to style.

We put a breakpoint in the ProfileView class we just wrote, and then we run the project, select Run- > Debug project name, and then run it. This address appears in the console: http://127.0.0.1:8000/, we click in, and then add the path of / users/profile/. Can we see the HTML code `users profile` that we edited?

Just talking about breakpoints, let's talk more about how to debug breakpoints in a Django project.

Step 1: make a breakpoint before the code you want to debug, that is, in front of the code, after the line number, click the mouse, you can set the breakpoint

The second step: first make sure the project is not running, then select Run- > Debug- > select the name of the project to run, then enter the breakpoint debugging, breakpoint there are many other operations and functions, move the mouse over the corresponding button to take a look at it

Configure url for users (problems that may occur when configuring routing again)

The problem of url (r'^ users/', include ('users.urls', namespace='users')) error may occur when configuring the url of users. It may be caused by the version of Django. The source code of version 1.0 is different from that of version 2.0, and the parameters of the include method are different. The include method in 2.0 cannot accept the app_name parameter. We need to make some adjustments. The solution is: url (r'^ users/', include (('users.urls',' users'), namespace='users')), so that you can start normally

This is the end of this article on "how to use Django View". I hope the above content can be helpful to you, so that you can learn more knowledge. if you think the article is good, please share it out for more people to see.

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