#2430: Widgets should use lazy params initialization to prevent from
inconsistence
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Reporter: xaka | Owner: Chris Arndt
Type: defect | Status: new
Priority: normal | Milestone: 1.0.x bugfix
Component: TG Widgets | Version: 1.0.9
Severity: normal | Keywords:
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Now, when we pass params to widget's contructor, logic 1st look at
**params and if nothing was found - check self object. Bah! All params
stores as ParamDescriptor instances on meta-level and when contructor
checking self object for param existence it call __get__ of descriptor
which do getattr(self, param) and call returned value if it callable.
Where is problem?
{{{
class MyWidget(turbogears.widgets.Widget):
@property
def some_param(self):
# connect to database, retrieve remote resource
# or do another operation which can't be processed
# at __init__ call-time
...
}}}
1. ParamDescriptor should return None if param is undefined in object
2. Widget's contructor should not to check self object for param
I've attach patch which fix that logic in right way (IMHO).
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Ticket URL: <http://trac.turbogears.org/ticket/2430>
TurboGears <http://www.turbogears.org/>
TurboGears front-to-back web development
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