Xtykutl

I cant understand how to show error in template without redirecting on error page.
My task is to check existence of email in database and if its doesnt exist raise an error in form.

Im using Django 2.1 and Python 3.7

What i have: django/auth/views.py

class PasswordResetView(PasswordContextMixin, FormView):

    email_template_name = 'registration/password_reset_email.html'

    extra_email_context = None

    form_class = PasswordResetForm

    from_email = None

    html_email_template_name = None

    subject_template_name = 'registration/password_reset_subject.txt'

    success_url = reverse_lazy('password_reset_done')

    template_name = 'registration/password_reset_for.html'

    title = _('Password reset')

    token_generator = default_token_generator



@method_decorator(csrf_protect)

def dispatch(self, *args, **kwargs):

    return super().dispatch(*args, **kwargs)



def form_valid(self, form):

    opts = {

        'use_https': self.request.is_secure(),

        'token_generator': self.token_generator,

        'from_email': self.from_email,

        'email_template_name': self.email_template_name,

        'subject_template_name': self.subject_template_name,

        'request': self.request,

        'html_email_template_name': self.html_email_template_name,

        'extra_email_context': self.extra_email_context,

    }

    email = form.cleaned_data['email']

    if User.objects.filter(email=email).exists():

        form.save(**opts)

        return super().form_valid(form)

    else:

        raise forms.ValidationError('Email is not in database')

        return email

its standart django class and im just trying to customize it a little bit.
Its works but redirects user on error page.

And here is a form of password reset

class PasswordResetForm(forms.Form):

email = forms.EmailField(label=_("Email"), max_length=254)



def check_email(self, email):

            email = form.cleaned_data['email']

            if User.objects.filter(email=email).exists():

                return email

            else:

                return forms.ValidationError('Email does not exist')

Ive tryed to add check method in form but its not working(

And here is code of my template:

        {% if form.errors %}

            {{ form.errors.as_text }}

{% endif %}

<form method="post">

    {% csrf_token %}

    <label for="id_email">Email:</label>

    <input type="email" name="email" maxlength="254" required="" id="id_email">

    <input type="submit">

</form>