#3481: request: else part for a for loop or make if to create variable
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Reporter: [EMAIL PROTECTED] | Owner: adrian
Status: new | Component: Template system
Version: 0.95 | Resolution:
Keywords: for if else loop | Stage: Design decision
needed
Has_patch: 0 | Needs_docs: 0
Needs_tests: 0 | Needs_better_patch: 0
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Comment (by mtredinnick):
It sounds like you are wanting "else" to only be executed when the "for"
is not looped through. However, this is not the way it works in, for
example, Python ("else" is executed when you don't break out of the loop
prematurely). I don't think we want to implement it in a way that is so
vastly different from Python: whilst we aren't implementing Python in
templates, behaving completely the opposite way is going to be too
confusing.
Setting a variable is a slippery slope and not really in the spirit of
templates. Fixing #2430 will help a little bit here (the if-test will be
faster and memory efficient). Knowing that you are going to be accessing
result_set.all() multiple times and passing it in as a !QuerySet to the
template will help, too (that is the normal and recommended way to do this
efficiently at the moment).
There may be another solution available, so I'll leave this open in case
another developer has an idea, but I am very much against using "else" in
the proposed way; it's just too confusing for Python programmers.
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Ticket URL: <http://code.djangoproject.com/ticket/3481#comment:2>
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