Recently I've found myself repeating variables many times in
templates, much like this:
{% if company.contact.email %}
<h3>Email address</h3>
<a href='mailto:
{{ company.contact.email }}'>{{ company.contact.email }}</a>
{% endifvalue %}
This repetition is annoying, as well as inefficient if company.contact
involves a ForeignKey lookup.
I've created a pair of tags, "ifvalue" and "ifnotvalue", to
encapsulate this behaviour:
{% ifvalue company.contact.email as email %}
<h3>Email address</h3>
<a href='mailto:{{ email }}'>{{ email }}</a>
{% endifvalue %}
The full code for the tag is at http://www.djangosnippets.org/snippets/124/
Andrew
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