How can I test if a field has been assigned to a channel?

Question

I've got a generic template that can display entries from different channels. How in the template can I test if a field has been has been assigned to any given channel?

Answer 1

Twig has a "is defined" test that you can apply to a variable to see if it exists:

{% if entry.possibleField is defined %}
    Yup!
{% else %}
    Nope!
{% endif %}

And here is more information on using is defined.