Django - user permissions to certain views?

Users that cannot add or change etc. a certain model, will not be able to see it in the admin.

If we are talking about your custom created views then you could create something which checks a user for a permission and returns a 404 if they do not have that permission. Permissions are linked to models and a group can be assigned various permissions.

You can add a permission to a model like this:

# myproject/myapp/models.py

class MyModel(models.Model):
    class Meta:
        permissions = (
            ('permission_code', 'Friendly permission description'),
        )

Then you can check a if a user has permission like this:

@user_passes_test(lambda u: u.has_perm('myapp.permission_code'))
def some_view(request):
    # ...

Using permissions you can then easily add or remove them from users and groups simply using the admin interface.

You need to manage that manually, but it's pretty easy. Presumably there's an attribute that determines whether or not a group has permission to see a view: then you just decorate that view with either the permission_required decorator, if it's a simple question of whether the user has a particular Permission, or user_passes_test if it's a bit more complicated:

@user_passes_test(lambda u: u.is_allowed_to_see_view_myview())
def myview(request):
    ...etc...

assuming that is_allowed_to_see_view_myview is some sort of method on the User object.

The authentication docs are pretty comprehensive.