Django who is logged in

Source: stackoverflow. Add a Grepper Answer. OperationalError: no such table: django make migrations django 3 add template folder django drop database postgres django group by date from datetime field how to check if given primary key exists in django model set django static root install django using pip django datetimefield default django get model class from queryset make column nullable django django postgres connection select realted for foreign key table in django pip update django runserver manage.

Run 'manage. Rick the documentation says different things for different version. Looks like for 1. Show 16 more comments. Django 1. Mark Chackerian Mark Chackerian That's okay because this method is used on request.

Whether a user is logged in or not only matters in the context of the request, for example the browser session. Assuming the application correctly logs out users - I have seen some that don't. Sopan Sopan 6 6 silver badges 13 13 bronze badges. The document says: Read-only attribute which is always True as opposed to AnonymousUser. This is a way to tell if the user has been authenticated.

Even though normally you will check this attribute on request. So if you want to display - un-authenticated users as "Welcome Guest" and authenticate users as "Welcome. Cubiczx Cubiczx 9 9 silver badges 6 6 bronze badges. Suyash Kumar Suyash Kumar 93 8 8 bronze badges. A 2 2 silver badges 11 11 bronze badges. For Django 2. Jatin Goyal Jatin Goyal 1 1 gold badge 2 2 silver badges 9 9 bronze badges. You are referencing django-rest-framework documentation not django — grouchoboy.

Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. The authentication framework discussed shortly handles this task for you in a much more robust and useful manner. Just call request. Internally, each session is just a normal Django model defined in django. Each session is identified by a more-or-less random character hash stored in a cookie.

This is necessary because the dictionary is stored in an encoded format:. By default, Django only saves to the database if the session has been modified — that is, if any of its dictionary values have been assigned or deleted:. Note that the session cookie is sent only when a session has been created or modified. Similarly, the expires part of a session cookie is updated each time the session cookie is sent. Cookies can optionally contain an expiration date that advises the browser on when to remove the cookie.

For the curious, here are a few technical notes about the inner workings of the session framework:. Session data is fetched upon demand. If you never access request. Django only sends a cookie if it needs to. The Django sessions framework is entirely, and solely, cookie based. This is an intentional design decision. Sessions give us a way of persisting data through multiple browser requests; the second part of the equation is using those sessions for user login.

Naturally, Django provides tools to handle this common task and many others. That name recognizes that dealing with users is often a two-step process. We need to. Like the session tools, authentication support is bundled as a Django application in django.

Once you have a User — often from request. AnonymousUser objects emulate some of this interface, but not all of it, so you should always check user. Tables and list the fields and methods, respectively, on User objects. Finally, User objects have two many-to-many fields: groups and permissions. User objects can access their related objects in the same way as any other many-to-many field:.

To authenticate a given username and password, use authenticate. It takes two keyword arguments, username and password , and it returns a User object if the password is valid for the given username.

If the password is invalid, authenticate returns None :. To log in a user, use login. This example shows how you might use both authenticate and login within a view function:.

To log out a user, use django. It takes an HttpRequest object and has no return value:. Note that auth. The first step in using these authentication views is to wire them up in your URLconf. This form needs to contain a username and a password field.

A simple template might look like this:. You can override this by providing a hidden field called next with the URL to redirect to after logging in. You can also pass this value as a GET parameter to the login view and it will be automatically added to the context as a variable called next that you can insert into that hidden field.

The logout view works a little differently. The simple, raw way to limit access to pages is to check request. Limiting access based on certain permissions or some other test, or providing a different location for the login view works essentially the same way. The raw way is to run your test on request. For example, this view checks to make sure the user is logged in and has the permission polls. It takes arguments and generates a specialized decorator for your particular situation:.

Using this decorator, the earlier example can be written as follows:. One of the most frequently asked questions on the Django users list deals with limiting access to a generic view.

The easiest way by far to manage the auth system is through the admin interface. However, there are low-level APIs you can dive into when you need absolute control, and we discuss these in the sections that follow. You can continue to change its attributes before saving, too:. More formally, the password attribute of a User object is a string in this format:. The User. Storing passwords as hashes reduces the value of a compromised database. However, an attacker with the password database could still run a brute- force attack, hashing millions of passwords and comparing those hashes against the stored values.

This takes some time, but less than you might think. Worse, there are publicly available rainbow tables , or databases of pre-computed hashes of millions of passwords. With a rainbow table, an experienced attacker could break most passwords in seconds.

Adding a salt — basically an initial random value — to the stored hash adds another layer of difficulty to breaking passwords.