IRC log of #zope3-dev for Thursday, 2009-07-30

« Wednesday, 2009-07-29 Index Friday, 2009-07-31 »
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thekryzHi there. I need a way to check in a page template, whether it is part of a view or not. So I need to see, if the variable "view" exists or not. How would you do that? Checking for a NameError doesn't seem to be possible in one line12:31
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__mac__thekryz: how about <tal:defs define="view view|nothing" />12:39
__mac__and then12:40
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__mac__<tal:cond condition="view"> do something </tal:cond><tal:no-view conditiion="not:view"> do something else </tal:no-view>12:41
* thekryz is trying12:41
thekryz<tal:define define="myView view|nothing"></tal:define> seems to somehow lead to "RuntimeError: maximum recursion depth exceeded"12:44
__mac__thekryz: right, use: myView nocall:view|nothing12:47
goschtlthekryz:  tal:define nocall12:47
__mac__otherwise the view gets called12:47
thekryzthanks, that was helpful :)12:50
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thekryznow every time I want to access my defined variable I have to use nocall:... Can't I do sth like "myView nocall:view and True|nothing"? Didn't succeed so far12:57
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__mac__thekryz: as view is callable ZPT calls it when you use it in a path expression, but you can do a next step:13:01
__mac__<tal:asdf define="have_view python:view is not None" />13:01
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thekryzthat's what I'm looking for, but it dowsn't seem to work in the case, that view does not exist - so I'd have to go through two defines then I guess? No, doesn't work either... what is the python equivalent for nocall?13:05
thekryzthis is how far I got: <tal:define define="myView nocall:view|nothing; hasView python:myView is not None">13:06
thekryzbut the last define still does the recursion dance13:06
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thekryzokay, I found the trick:13:21
thekryzsimilar as the nocall, there is also an exists.13:22
thekryzso I can just do a tal:condition="exists:view"13:22
thekryzthat's it :>13:23
thekryzthanks again13:25
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