@receiver(pre_save, sender=User)
def User_pre_save(sender, **kwargs):
email = kwargs['instance'].email
username = kwargs['instance'].username
if not email: raise ValidationError("email required")
if sender.objects.filter(email=email).exclude(username=username).count(): raise ValidationError("email needs to be unique")<div class="tags">
{% for value in tag %}
<ul>
<li><a href="">{{value.name}}</a></li>
</ul>
{% endfor %}
</div><ul class="tags">
{% for value in tag %}
<li><a href="">{{value.name}}</a></li>
{% endfor %}
</ul>url(r'^coupons$', views.coupons, name='coupons'),<a href="{% url coupons %}?category=1">
import sys
sys.path.append('..')
from apps.settings_local import DATABASES