#2462: member variable in Form called 'method', causing exception
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Reporter: rmancy | Owner:
Type: defect | Status: new
Priority: normal | Milestone: __unclassified__
Component: TurboGears | Version: 1.0.8
Severity: normal | Resolution:
Keywords: |
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Comment (by xaka):
If you take a look on Form's class definition:
{{{
class Form(FormFieldsContainer):
form = True
name = "form"
member_widgets = ["submit"]
params = ["action", "method", "form_attrs", "use_name", "submit_text"]
}}}
You can see that '''method''' already defined as widget's parameter.
Parameters can be not just a value, but a callable object. If parameter is
callable it will be called _before_ passing to widget's template. Also it
will be called when you'll try to access to that parameter via dot-
notation (my_widget.method).
What did you? In your class you assign instance of SingleSelectField to
'''method''' variable. SingleSelectField is the widget. Every widget is
callable object. At call time it returns ElementStream/Element instance.
Also you define '''method''' as member widget which already defined as
widget's parameter.
At the render time TG's internal code tried to access to your member
widget '''method''', which is parameter too, and expected to get Widget-
base instance, but got Element instance. Why? Because '''method''' is the
parameter, it has instance of some widget and as we know - every widget is
the callable object.
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Ticket URL: <http://trac.turbogears.org/ticket/2462#comment:1>
TurboGears <http://www.turbogears.org/>
TurboGears front-to-back web development
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