Template Tag First of

Template tag firstof.

Outputs the first variable passed that is not false, without escaping. Outputs nothing if all the passed variables are false.

Sample usage:

{firstof array($var1, $var2, $var3)}

This is equivalent to:

{if $var1}
    {$var1|safe}
{elseif $var2}
    {$var2|safe}
{elseif $var3}
    {$var3|safe}
{/if}

You can also use a literal string as a fallback value in case all passed variables are false:

{firstof array($var1, $var2, $var3), "fallback value"}

Based on concepts from the Django firstof template tag.