Why doesn't login with Django login() work?

Question

JavaScript

In short, I am writing an authentication system in django, using popups and ajax requests.
The structure is something like this:
The page has a bootstrap popup (#LoginModal), it contains a form (#login-form).
On submit, an ajax request is made to the login view (url : "/login/" --> login_user).
This view (login_user) returns the result and then js displays error information or redirects the user (if the login is successful).
Those. #LoginModal --> #login-form --> ajax --> /login/ --> login_user --> ajax-data --> reload or show errors

Here is my js + ajax code:

alert('{{user.is_authenticated}}');
$('#login-form').on('submit', function(event){
    event.preventDefault();
    $('#login-form .alert-success').remove();
    $('#login-form #login_btn').addClass('disabled');
    $('#login-form #login_btn').prop('disabled', true);
    $.ajax({
        url : "/login/",
        type : "get",
        data : $('#login-form').serialize()
    }).done(function(data) {
        if (data == "OK") {
            $('#login-form .alert-danger').remove();
            $('#login-form').prepend('<div class="alert alert-success" role="alert"><strong>Успешно!</strong><br>Подождите секундочку...</div>');
            document.location.href = document.location.href.replace('#open_login', '');
        } else {
            if (!$('#login-form .alert-danger').length) {
                $('#login-form').prepend('<div class="alert alert-danger" role="alert"><strong>Ошибка!</strong><br>Введите правильное имя пользователя и пароль.</div>');
            }
            $('#login-form #login_btn').removeClass('disabled');
            $('#login-form #login_btn').prop('disabled', false);
        }
    });
});

Here is my login_user view:

def login_user(request):
    username = request.GET.get('username')
    password = request.GET.get('password')
    auth_form = AuthenticationForm(request, {'username': username, 'password': password})
    if auth_form.is_valid():
        if request.GET.get('remember') == "true":
            pass
        else:
            request.session.set_expiry(0)
        user = authenticate(username=username, password=password)
        login(request, user)
        print(user.is_authenticated)
        ret = 'OK'
    else:
        ret = 'field_errors'
    return HttpResponse(ret)

And herein lies the problem.
Function

login(request, user)

or not executed, or performed somehow wrong.
With correct data, the alert in js always shows false;
And the data on the page says the same.
And print in the view says - true, everything is OK, bro! And the user correctly displays.
And I don’t remember exactly what I changed, but at some point this thing arose.

I'm new to django and need your help. Thanks in advance.

Answer 1

This worked for me in views.py
from django.contrib import auth
def login(request):
...
auth.login(request, user)
....

Answer 2

Your code helped me, I made an entrance through the bootstrap modal window.
ajax

$('#login-form').on('submit', function(event){
        event.preventDefault();
        var csrf_token = $('#login-form [name="csrfmiddlewaretoken"]').val();
        var idu = $('#idu').val();
        var idp = $('#idp').val();
        $.ajax({
            url : "/login/",
            type : "POST",
            data : { csrfmiddlewaretoken: csrf_token, lgn: idu, pswd: idp},
            traditional: true
        }).done(function(response) {
            if (response == "OK") {
                $('#login-form .alert-danger').remove();
                $('#login-form').prepend('<div class="alert alert-success" role="alert"><strong>Успешно!</strong><br>Подождите секундочку...</div>');
                document.location.href = document.location.href.replace('#open_login', '');
            } else {
                if (!$('#login-form .alert-danger').length) {
                $('#login-form').prepend('<div class="alert alert-danger" role="alert"><strong>Ошибка!</strong><br>Введите правильное имя пользователя и пароль.</div>');
            }
            }
        });
    });

views.py

def auth_view(request):
    username = request.POST.get('lgn', '')
    password = request.POST.get('pswd', '')
    user = auth.authenticate(username=username, password=password)
    if user is not None:
        if user.is_active:
            auth.login(request, user)
            return HttpResponse('OK')
    else :
        return HttpResponse("False")

urls.py template login.html

<div class="modal fade" id="LogModal" tabindex="-1" role="dialog" aria-labelledby="LogModalLabel" aria-hidden="true">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="LogModalLabel">Вход в учетную запись</h5>
                <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                    <span aria-hidden="true">&times;</span>
                </button>
            </div>
            <form id="login-form" method="post" action="">{% csrf_token %}
                <div class="modal-body">
                    <label for="id_username">Имя пользователя:</label>
                    <input class="form-control" type="text" name="username" maxlength="30" id="idu"/>
                    <label for="id_password">Пароль:</label>
                    <input class="form-control" type="password" name="password" id="idp"/>
                </div>
                <div class="modal-footer">
                    <button type="submit" class="btn btn-primary">Войти</button>
                </div>
            </form>
        </div>
    </div>
</div>

Calling a modal window:
Maybe someone from beginners will help, I have been looking for the information I need for a long time - there is no ready-made recipe, unfortunately.

Answer 3

1) The standard Django mechanism does not pull data without a page refresh.
2) I wrote a scheme when I saved the current user page into a variable, upon login (if successful, I sent the response to json) - I did a forced refresh of the page to the page that I had previously saved.
3) After that, I received an authorization user and all the fields I needed.