#10143: "add" template filter always converts arguments to integers
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Reporter: jfw | Owner: nobody
Status: new | Milestone:
Component: Template system | Version: 1.0
Resolution: | Keywords:
Stage: Design decision needed | Has_patch: 0
Needs_docs: 0 | Needs_tests: 0
Needs_better_patch: 0 |
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Changes (by jacob):
* needs_better_patch: => 0
* stage: Unreviewed => Design decision needed
* needs_tests: => 0
* needs_docs: => 0
Comment:
There has to be a cast to make it work in a sane manner since the argument
passed to filters always comes in as a string. So if you've got `{{
foo|add:"1" }}`, Django has no way of knowing if you meant "add 1 to the
number `foo`" (which should fail if `foo` isn't an integer) or "append the
string '1' to the variable `foo`" (which should fail if `foo` isn't a
string).
Bright ideas welcome, but I don't see a good way to solve this without a
huge tree of `isinstance` checks, which would be nasty.
--
Ticket URL: <http://code.djangoproject.com/ticket/10143#comment:1>
Django <http://code.djangoproject.com/>
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