What is the equivalent of "none" in django templates?

django, django-forms, django-templates, django-views, python

Solution

`None, False and True` all are available within template tags and filters. `None, False`, the empty string (`'', "", """"""`) and empty lists/tuples all evaluate to `False` when evaluated by `if`, so you can easily do

{% if profile.user.first_name == None %}
{% if not profile.user.first_name %}

A hint: @fabiocerqueira is right, leave logic to models, limit templates to be the only presentation layer and calculate stuff like that in you model. An example:

# someapp/models.py
class UserProfile(models.Model):
    user = models.OneToOneField('auth.User')
    # other fields

    def get_full_name(self):
        if not self.user.first_name:
            return
        return ' '.join([self.user.first_name, self.user.last_name])

# template
{{ user.get_profile.get_full_name }}

Problem

I want to see if a field/variable is none within a Django template. What is the correct syntax for that? This is what I currently have: ``` {% if profile.user.first_name is null %} <p> -- </p> {% elif %} {{ profile.user.first_name }} {{ profile.user.last_name }} {% endif%} ``` In the example above, what would I use to replace "null"?

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