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Fixed #6295 -- Made the {% for %} tag a bit more efficient by creating a single context dictionary rather than recreating it each time through the loop. Thanks, Ned Batchelder

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git-svn-id: http://code.djangoproject.com/svn/django/trunk@6981 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Adrian Holovaty 2008-01-02 05:01:03 +00:00
parent bd0897baa7
commit 293f0f2360
2 changed files with 15 additions and 12 deletions
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19
django/template/defaulttags.py
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@ -125,19 +125,20 @@ class ForNode(Node):
if self.is_reversed:
values = reversed(values)
unpack = len(self.loopvars) > 1
# Create a forloop value in the context. We'll update counters on each
# iteration just below.
loop_dict = context['forloop'] = {'parentloop': parentloop}
for i, item in enumerate(values):
context['forloop'] = {
# Shortcuts for current loop iteration number.
'counter0': i,
'counter': i+1,
loop_dict['counter0'] = i
loop_dict['counter'] = i+1
# Reverse counter iteration numbers.
'revcounter': len_values - i,
'revcounter0': len_values - i - 1,
loop_dict['revcounter'] = len_values - i
loop_dict['revcounter0'] = len_values - i - 1
# Boolean values designating first and last times through loop.
'first': (i == 0),
'last': (i == len_values - 1),
'parentloop': parentloop,
}
loop_dict['first'] = (i == 0)
loop_dict['last'] = (i == len_values - 1)
if unpack:
# If there are multiple loop variables, unpack the item into
# them.

2
tests/regressiontests/templates/tests.py
View File

@ -441,6 +441,8 @@ class Templates(unittest.TestCase):
'for-tag-vars02': ("{% for val in values %}{{ forloop.counter0 }}{% endfor %}", {"values": [6, 6, 6]}, "012"),
'for-tag-vars03': ("{% for val in values %}{{ forloop.revcounter }}{% endfor %}", {"values": [6, 6, 6]}, "321"),
'for-tag-vars04': ("{% for val in values %}{{ forloop.revcounter0 }}{% endfor %}", {"values": [6, 6, 6]}, "210"),
'for-tag-vars05': ("{% for val in values %}{% if forloop.first %}f{% else %}x{% endif %}{% endfor %}", {"values": [6, 6, 6]}, "fxx"),
'for-tag-vars06': ("{% for val in values %}{% if forloop.last %}l{% else %}x{% endif %}{% endfor %}", {"values": [6, 6, 6]}, "xxl"),
'for-tag-unpack01': ("{% for key,value in items %}{{ key }}:{{ value }}/{% endfor %}", {"items": (('one', 1), ('two', 2))}, "one:1/two:2/"),
'for-tag-unpack03': ("{% for key, value in items %}{{ key }}:{{ value }}/{% endfor %}", {"items": (('one', 1), ('two', 2))}, "one:1/two:2/"),
'for-tag-unpack04': ("{% for key , value in items %}{{ key }}:{{ value }}/{% endfor %}", {"items": (('one', 1), ('two', 2))}, "one:1/two:2/"),