The reason is that a Django template is converted to a Node-tree and
this Node-tree is executed/rendered when the template is evaluated.
The Node's keep there state in between template renderings.
The solution is to add a tag that resets the counters in the CycleNode
instances.
At the end of the (base) template call this tag
{% resetcycle %}
-----------------------
from google.appengine.ext import webapp
from django.template import Node
register = webapp.template.create_template_register()
class ResetCycleNode(Node):
def __init__(self, cyclenodes):
self.cyclenodes = cyclenodes
def render(self, context):
for c in self.cyclenodes.values():
c.counter = -1
return ''
@register.tag
def resetcycle(parser, token):
# if you need tag error checking have a look at the Django
defaulttag.py file on how to do it
return ResetCycleNode(getattr(parser,'_namedCycleNodes',{}))
----------------------------------
2010/8/11 Joshua Smith <[email protected]>:
> I've been living with this one for a long time. My solution was to
> artificially add an iteration to make sure it had the right modulus number
> of rows.
> On Aug 11, 2010, at 1:43 PM, Ikai L (Google) wrote:
>
> Interesting bug. It shouldn't work this way. I'll take a look at this.
> Can you accomplish the same thing using the span tag and just letting it
> wrap?
>
> On Wed, Aug 11, 2010 at 1:12 AM, Blixt <[email protected]> wrote:
>>
>> When using {% cycle first,second %} it would appear that its state is
>> stored between requests. The first time, the results are first,
>> second, first, second... and the second request is second, first,
>> second, first... (there is an odd amount of items that are cycled.)
>>
>> Is this bug specific to Google App Engine? A Google search didn't seem
>> to bring up any results mentioning it.
>>
>> For a live example, see: http://2.latest.simpleeditionsapp.appspot.com/
>> Relevant code:
>>
>> http://github.com/littke/simpleeditions/blob/187c5ebf71ce1824acb28eb8da8dd51aca20a848/src/templates/home.html#L15
>>
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