#12199: Give 'firstof' tag ability to assign result to context
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Reporter: tiliv | Owner: nobody
Type: New feature | Status: new
Component: Template system | Version: master
Severity: Normal | Resolution:
Keywords: firstof, as, context | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 0
Needs tests: 1 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by mark0978@…):
There is another instance where the AS keyword would be very useful
Trying to write a template to include something for xyz: in json, but i
can't put {% firstof %} output thru escapejs as it currently stands.
{{{
xyz: '{% firstof a b %}',
}}}
with AS, we could do:
{{{
{% firstof a b AS c %}
xyz: '{{ c|escapejs }}',
}}}
Right now to do this you end up with a logic block in the template.
{{{
{% if a %}{{ a|escapejs }}{% else %}{{ b|escapejs }}{% endif %}
}}}
which isn't horrible until you only want a or b if EITHER of them is
defined and then it looks like:
{{{
{% if a or b %}xyz: '{% if a %}{{ a|escapejs }}{% else %}{{ b|escapejs
}}{% endif %}',{% endif %}
}}}
while it could be as simple as:
{{{
{% firstof a b AS c %}{% if c %}xyz: '{{ c|escapejs }}',{% endif %}
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/12199#comment:8>
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