[Fixed]-How to use 'redirect' and 'message' on django, python

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1👍

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As I understand, in simplest case you need something like this.

from django import forms
from django.contrib.auth import authenticate

class AuthenticationForm(forms.Form):
    username = forms.CharField(max_length=254)
    password = forms.CharField(widget=forms.PasswordInput)

    def clean(self):
        username = self.cleaned_data['username']
        password = self.cleaned_data['password']
        user = authenticate(username=username, password=password)
        if user is None:
            raise forms.ValidationError('invalid_login')

        return self.cleaned_data

Now view:

from django.contrib.auth import login
from django.http import HttpResponseRedirect
from django.template.response import TemplateResponse

def user_login(request):
    if request.method == "POST":
        form = AuthenticationForm(request, data=request.POST)
        if form.is_valid():
            login(request, form.get_user())

            # if you use named views you can use reverse here:
            # redirect_url = reverse('post_list')
            # Or even if you want to return back to previous url:
            # referrer = request.META['HTTP_REFERER']
            # if referrer:
            #     redirect_url =  referrer.split('/', 3)[3]
            redirect_url = '/post-list/'  # it's 'success page'
            return HttpResponseRedirect(redirect_url)  

    else:
        form = AuthenticationForm(request)

    return TemplateResponse(request, 'login.html', {'form': form})

And now you can use login_required decorator for your POST views (create/update/delete), for example:

from django.contrib.auth.decorators import login_required

@login_required(login_url='/accounts/login/')
def post_delete(request, id=None):
    ...

Simplest example for login form (template):

<form method="post" action="{% url 'login' %}">
    {% csrf_token %}
    Username: {{ form.username }} {{ form.username.errors }}<br> 
    Password: {{ form.password }} {{ form.password.errors }}<br>
    {{ form.errors }}<br>
    <input type="submit" value="login" />
</form>`
👤Mark Mishyn

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