tutorial and help texts for tags in new resource form

[redakcja.git] / redakcja / forms.py

diff --git a/redakcja/forms.py b/redakcja/forms.py
index 16ad87e..12fb3a8 100644 (file)
--- a/redakcja/forms.py
+++ b/redakcja/forms.py
@@ -4,6 +4,10 @@
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
 from django import forms
+from django.core.urlresolvers import reverse
+from django.utils.safestring import mark_safe
+from django.utils.translation import ugettext as _
+from django.contrib.auth.models import User
 
 
 class RegistrationForm(forms.Form):
@@ -11,3 +15,18 @@ class RegistrationForm(forms.Form):
     last_name = forms.CharField()
     email = forms.EmailField()
     password = forms.CharField(widget=forms.PasswordInput)
+
+    def clean_email(self):
+        max_length = User._meta.get_field('username').max_length
+        email = self.cleaned_data['email']
+        if User.objects.filter(username=email).exists():
+            msg = _(
+                'User with this email address already exists. '
+                '<a href="%(login_url)s">Log in</a> or <a href="%(reset_url)s">reset your password</a>.') % {
+                'login_url': reverse('login'),
+                'reset_url': reverse('password_reset'),
+            }
+            raise forms.ValidationError(mark_safe(msg))
+        if len(email) > max_length:
+            raise forms.ValidationError(_('Username too long. Max length: %s') % max_length)
+        return email