Commits
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f5b9df9 added `if` modifier support to for loop like {% for k in v if k is odd %}
Discussion
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[1.2] added `if` modifier support to for loop
Hi.
I'm one of Twig users who love it so much. :)
I've made a patch for adding `if` modifier support to `for` loop in Twig.
Example:
<pre>
{% for n in range(0, 5) if n is odd %}
{{ n }}
{% endfor %}
</pre>
Output:
<pre>
1
3
5
</pre>
This idea comes from Python's list comprehensions. (like `[n for n in range(0,6) if n % 2 == 1]`)
Here is another example.
Before:
<pre>
{% set no_items = true %}
{% for item in items %}
{% if item.available %}
{% set no_items = false %}
{{ item.name }}
{% endif %}
{% endfor %}
{% if no_items %}
No items available.
{% endif %}
</pre>
After:
<pre>
{% for item in items if item.available %}
{{ item.name }}
{% else %}
No items available.
{% endfor %}
</pre>
I hope you like it. But If not, just ignore this request. :)
Thanks.
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by fabpot at 2011/06/24 01:33:33 -0700
I like it! I will schedule it for inclusion in Twig 1.2. Thanks.
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by hhamon at 2011/06/26 16:43:26 -0700
+1
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by nikic at 2011/06/27 00:42:14 -0700
I think the idea per se is interesting. But I just checked all Twig templates in my whole codebase and couldn't find any use for it. What was your practical use for this feature @kotas?
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by kotas at 2011/06/27 01:52:48 -0700
@nikic My practical use is shown as the second example in the body of this pull request.
Sometimes you need to "filter" an array by seeing its element's property like "item.available" or by some condition like "item.price >= 500".
To do this, in the current version of Twig, you have to write "for" and "if" as nested scopes. And if you want to write {% else %} of the "for" loop, you have to make a temporary variable to see if all elements are skipped.
I think this feature is not essential, but makes templates clean.
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by nikic at 2011/06/27 06:23:24 -0700
The thing about `else` seems plausible. +1
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by chucktrukk at 2011/08/02 17:39:16 -0700
Also +1. that makes some very clean template code.
Commits
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7b154d6 Switched a tab to four spaces
29d3cb2 Added testcase for #3954fc7a8d Merge remote-tracking branch 'upstream/master'
c890cf2 Fixed existing tests
9822ac4 Changed Module.php to pass existing tests
fab8c72 fixed issue #395
Discussion
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Fix for issue #395
Fix for #395
I hope you can use it.
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by fabpot at 2011/07/25 00:07:50 -0700
Can you add some unit tests?
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by netzhuffle at 2011/07/25 13:57:55 -0700
Here you are.
Fabien Potencier
Max Romanovsky
nikic
Martin Hason
Jannis Grimm