Re: passing a keyword argument from form to a field in that form

[Jim]

On Aug 3, 3:59 am, Daniel Roseman  wrote:
> This code looks absolutely right.

Boy there's a phrase I don't hear often!

> What do you mean by 'setting
> self.fields didn't work'? How did it not work? What didn't happen that
> you expected to happen? Did you get errors?

If I put in a statement logging the value of self.show_all, it is
unaffected by whether I call KeywordsForm as
KeywordsForm(show_all=True) or KeywordsForm(show_all=False).

> That is the usual way of dynamically setting an attribute on a field,
> and I've used it many times with no problems.

Thank you, Daniel; it is helpful to know that I have the right
approach but must have a bug somewhere.  I'll have another whack at
it-- sometimes a nights sleep makes plain some imbecility on my
part.  :-)

Jim

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Re: passing a keyword argument from form to a field in that form

[Daniel Roseman]

On Aug 2, 11:06 pm, Jim  wrote:
> Hello,
>
> I have a custom field whose behavior depends on a parameter show_all.
> (It makes the field pull from the database for display only those
> keywords where show=True.)
>
>     class KeywordsField(forms.ChoiceField):
>         def __init__(self, choices=(), required=True,
> widget=widgets.KeywordsWidget, label=None, initial=None,
> show_all=False, help_text=None):
>             self.show_all=show_all
>             super(KeywordsField, self).__init__(choices=self.choices,
> required=required, widget=widget, label=label, initial=initial,
> help_text=help_text)
>
> (edited; I hope I didn't introduce any typos.)
>
> I have a form that I'd like to call as
>     f0=KeywordsForm(show_all=True)
> and pass show_all to the field.  Here is my try.
>
>     class KeywordsForm(forms.Form):
>         keywords=KeywordsField(required=False)
>
>         def __init__(self, show_all=False, *args, **kwargs):
>             self.show_all = show_all
>             super(KeywordsForm, self).__init__(*args, **kwargs)
>             self.fields['keywords'].show_all=show_all
>
> Setting self.fields didn't work (or I wouldn't be writing).  Neither
> did calling this.
>     keywords=KeywordsField(required=False,show_all=self.show_all)
> Neither did a fair amount of looking at the documentation, the source,
> and googling, although no doubt I didn't do it right.
>
> Can someone give me a hint about how I should do it?  I'd be grateful.
> Jim

This code looks absolutely right. What do you mean by 'setting
self.fields didn't work'? How did it not work? What didn't happen that
you expected to happen? Did you get errors?

That is the usual way of dynamically setting an attribute on a field,
and I've used it many times with no problems.
--
DR.

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passing a keyword argument from form to a field in that form

[Jim]

Hello,

I have a custom field whose behavior depends on a parameter show_all.
(It makes the field pull from the database for display only those
keywords where show=True.)

class KeywordsField(forms.ChoiceField):
def __init__(self, choices=(), required=True,
widget=widgets.KeywordsWidget, label=None, initial=None,
show_all=False, help_text=None):
self.show_all=show_all
super(KeywordsField, self).__init__(choices=self.choices,
required=required, widget=widget, label=label, initial=initial,
help_text=help_text)

(edited; I hope I didn't introduce any typos.)

I have a form that I'd like to call as
f0=KeywordsForm(show_all=True)
and pass show_all to the field.  Here is my try.

class KeywordsForm(forms.Form):
keywords=KeywordsField(required=False)

def __init__(self, show_all=False, *args, **kwargs):
self.show_all = show_all
super(KeywordsForm, self).__init__(*args, **kwargs)
self.fields['keywords'].show_all=show_all

Setting self.fields didn't work (or I wouldn't be writing).  Neither
did calling this.
keywords=KeywordsField(required=False,show_all=self.show_all)
Neither did a fair amount of looking at the documentation, the source,
and googling, although no doubt I didn't do it right.

Can someone give me a hint about how I should do it?  I'd be grateful.
Jim

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