python 3.x - How can I make a specific login for specific group with Django's `authenticate()`? -

hello have been looking through documentation in https://docs.djangoproject.com/en/1.11/topics/auth/default/#authenticating-users. however, shows how authenticate user.

i have grouped user want specific user login in specific form. how can achieve that?

additionally, when should use permissions , when should use groups?

i suggest create custom decorator it, why? because think method easy understand how work group using permissions.

an example in yourapp/decorators.py:

you can see, here focusing on if ... request.user.groups.filter(name='moderator') handle group.

from django.shortcuts import render  def moderator_login_required(function):     def wrap(request, *args, **kwargs):         if request.user.is_authenticated() \                 , request.user.groups.filter(name='moderator').exists():             return function(request, *args, **kwargs)         else:             context = {                 'title': _('403 forbidden'),                 'message': _('you not allowed access page!')             }             # can return redirect page here.             return render(request, 'path/to/error_page.html', context)     wrap.__doc__ = function.__doc__     wrap.__name__ = function.__name__     return wrap 

ho use in views.py?

from yourapp.decorators import moderator_login_required  @moderator_login_required def dashboard(request):     #do_stuff 

or, if working cbv (class bassed view), can using @method_decorator, eg:

from django.views.generic.base import templateview django.utils.decorators import method_decorator  yourapp.decorators import moderator_login_required  class dashboardview(templateview):      @method_decorator(moderator_login_required)     def dispatch(self, *args, **kwargs):         return super(dashboardview, self).dispatch(*args, **kwargs) 

hope helpful..