My view to login keeps saying that "User with this Email already exists."

Question

I have a customized User model

class User(AbstractBaseUser):
   email       = _models.EmailField     (max_length=252, unique=True)
   username    = _models.CharField      (max_length=252, blank=True, null=True)
   staff       = _models.BooleanField   (default=False)
   superuser   = _models.BooleanField   (default=False)
   active      = _models.BooleanField   (default=True)

   USERNAME_FIELD = 'email'

This is the form

class UserLoginForm(_f.ModelForm):
    password = _f.CharField(widget=_f.PasswordInput())

    class Meta:
        model = User
        fields = ['email', 'password']

And this is the view

from django.contrib.auth import authenticate, login
from django.views.generic import FormView,
from .forms import UserRegistrationForm, UserLoginForm
class UserLoginView(FormView):
    form_class = UserLoginForm
    success_url = '/'
    template_name = 'accounts/user_login.html'

    def form_valid(self, form):
        email = form.cleaned_data.get('email')
        password = form.cleaned_data.get('password')
        user = authenticate(request=self.request, email=email, password=password)

        if user:
            login(self.request, user)
            return super(UserLoginView, self).form_valid(form)

        return super(UserLoginView, self).form_invalid(form)

the urls.py of the app

from django.urls import path
from .views import UserLoginView, UserRegistrationView
app_name = 'accounts'
urlpatterns = [
    path('login/', UserLoginView.as_view(), name='login'),
    path('register/', UserRegistrationView.as_view(), name='register'),
]

the urls.py of the project

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', include('applications.accounts.urls', namespace='namespace_accounts')),
]

This the template user_login.html of the view UserLoginView

{% extends 'accounts/login_base.html' %}
{% load staticfiles %}

{% block content %}
<form method="POST">
    <div class="form-group">
        {% csrf_token %}
        {{ form.as_p }}
    </div>
    <button type="submit" class="btn btn-dark">Login</button>
</form>
{% endblock %}

After registrating as new user, the user is redirected to the login page, with the credentials, the login keeps saying "User with this Email already exists."

Note: The email field on the model User is unique.

Is obvious that the login page is trying to make another registration somehow, and this "somehow" is what it's confusing me.

What could I possibly be doing to solve this "User with this Email already exists."?

`User with this Email already exists` because actually, the user enters an email already in db, not correct? — Lemayzeur, May 03 '18 at 23:13
@Lemayzeur, Yes indeed, but it's a login and not a registration, thus if the login does exists and the password is valid then the login must proceed to a success url. — R.R.C., May 03 '18 at 23:15
Somewhere in your codes, something hits the model with this data... — Lemayzeur, May 03 '18 at 23:18
@HenrikAndersson, Do you have some hint on how could I possibly check which view the `POST` is being issued? — R.R.C., May 03 '18 at 23:20
the attribute `action` of your form, maybe it calls another view, can we see your template as well? — Lemayzeur, May 03 '18 at 23:32
@Lemayzeur, Right. Added the template. One thing, my form doesn't have the `action` attribute. Maybe that's a problem. — R.R.C., May 03 '18 at 23:37
of course, it's a problem, you should provide the `url`, or let it empty if the current view is the same that will receive post data — Lemayzeur, May 03 '18 at 23:46
@Lemayzeur, I added to the form `action="{% url 'accounts:login' %}"`, but the problem still persists. — R.R.C., May 03 '18 at 23:53
Possible duplicate of [Django - authenticate() A user with that username already exists](https://stackoverflow.com/questions/42792734/django-authenticate-a-user-with-that-username-already-exists) — solarissmoke, May 04 '18 at 02:50

R.R.C. · Accepted Answer · 2018-05-09T22:36:30.243

2

As I suspected, the UserLoginView was trying to make another registration, that is, create a new user again, instead of authenticate and do the login. That was happening because my form inherited from forms.ModelForm; changing from forms.ModelForm to forms.Form solved the problem.

The credit goes to this Answer which punched right at the problem!

edited May 09 '18 at 22:36

answered May 04 '18 at 01:20

R.R.C.

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My view to login keeps saying that "User with this Email already exists."

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