Is the initial value of a form field available in the template?
I'm doing a custom template (probably stupid), and using initial
values. Here's a precis:
template has
{{form.url.field.initial}}
{{form.auth_id}} {{form.media_id}} {{form.fence_id}}
Reminder String:
form type looks like
class editFenceForm(forms.Form):
teaser = forms.CharField(max_length=40)
auth_id = forms.CharField(widget=forms.HiddenInput)
media_id = forms.IntegerField(widget=forms.HiddenInput)
fence_id = forms.IntegerField(widget=forms.HiddenInput)
invocation looks like
form = editFenceForm(initial={
'auth_id' : auth_id, 'fence_id': fence_id, 'media_id':
m_id,
'teaser': m.teaser, })
output html looks like
None
Reminder String:
I'm really not expecting "None" there. If I just use {{form.as_p}},
the values are filled in correctly.
What am I missing?
Thanks,
chris
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Re: Is the initial value of a form field available in the template?
On Nov 26, 2:14 pm, ChrisK <[EMAIL PROTECTED]> wrote:
> I'm doing a custom template (probably stupid), and using initial
> values. Here's a precis:
>
> template has
>
>
> {{form.url.field.initial}}
> {{form.auth_id}} {{form.media_id}} {{form.fence_id}}
> Reminder String:
> p>
>
> form type looks like
>
> class editFenceForm(forms.Form):
> teaser = forms.CharField(max_length=40)
> auth_id = forms.CharField(widget=forms.HiddenInput)
> media_id = forms.IntegerField(widget=forms.HiddenInput)
> fence_id = forms.IntegerField(widget=forms.HiddenInput)
>
> invocation looks like
>
> form = editFenceForm(initial={
> 'auth_id' : auth_id, 'fence_id': fence_id, 'media_id':
> m_id,
> 'teaser': m.teaser, })
>
> output html looks like
>
>
> None
>
>
>
>
> Reminder String:
> p>
>
> I'm really not expecting "None" there. If I just use {{form.as_p}},
> the values are filled in correctly.
>
> What am I missing?
Obviously, {{form.url.field.initial}} is causing it. The question is,
do you have a field called url in your form. Your Form class
definition above does not show such a field nor are you trying to set
an initial value for it in the form instantiation. Perhaps you want to
paste your test code again?
-Rajesh D.
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Re: Is the initial value of a form field available in the template?
Sorry, I cut down my example poorly.
template has
{{form.teaser.field.initial}}
{{form.auth_id}} {{form.fence_id}}
Reminder String:
invocation looks like
print m.teaser
form = editFenceForm(initial={
'auth_id' : auth_id, 'fence_id': fence_id,
'teaser': m.teaser, })
and, indeed, the print statement produces a value
resulting HTML looks like
Reminder String:
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Re: Is the initial value of a form field available in the template?
I think you really need to explain what the real problem is that you're
trying to solve, because you're asking a question that is too specific.
On Wed, 2008-11-26 at 12:19 -0800, ChrisK wrote:
> Sorry, I cut down my example poorly.
>
> template has
>
>
> {{form.teaser.field.initial}}
> {{form.auth_id}} {{form.fence_id}}
> Reminder String:
> > p>
The answer to your question as to whether this is correct syntax is
"yes, it is". However, I guess from the fact that you asked the
question, that what you're really asking is how to get the initial value
that the form will assign to the field. Since initial data can come from
either the form or the field, the way you are accessing it above is too
specific (in this case, the field class itself doesn't have initial
data, but the form might well have some initial data for that field).
If you look in django/forms/forms.py in the BoundField.as_widget()
method, you'll see how Django works out the value for a form widget.
It's a combination of the forms "data" value for the field, form initial
data and field initial data. Which also hints that it's almost never
going to be correct to force the use of "initial" data at the template
level, since if there's form-supplied "data" data, that should override
the "initial" data value. At the template level, attemptign to
differentiate between a value that was an initial default and a value
that was supplied by a previous post to the form is not really
appropriate. Even if you could do so, it would be exploiting a leaky
abstraction. At the form display level, you simply shouldn't care about
that difference.
Again, it comes to down to "what is the real problem you are trying to
solve?"
At the templ
Regards,
Malcolm
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Re: Is the initial value of a form field available in the template?
> I think you really need to explain what the real problem is that you're > trying to solve, because you're asking a question that is too specific. Fair enough. It's been several days, so I had to dredge a bit to remember :-) I think the basic issue is that there are some fields in the object that I'd like to display but not have editable, and it's not at all clear to me how to make that happen in the form processor. The values are dynamic, so they can't be in the template. I'm happy not to replicate the logic inside BoundField.as_widget(), if there's some way that the "correct" value is exposed to the template... --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~--~~~~--~~--~--~---
Re: Is the initial value of a form field available in the template?
> I think the basic issue is that there are some fields in the object
> that I'd like to display but not have editable, and it's not at all
> clear to me how to make that happen in the form processor. The values
> are dynamic, so they can't be in the template.
I often have this need so I created a custom widget where I just set
the readonly attribute on a TextInput widget:
class LabelWidget(forms.TextInput):
def __init__(self, *args, **kwargs):
attrs = kwargs.get('attrs', {})
attrs['readonly'] = True
if 'class' in attrs:
attrs['class'] = attrs['class'] + ' label'
else:
attrs['class'] = 'label'
super(LabelWidget, self).__init__(*args, **kwargs)
Then I use it in forms like this:
class AccountForm(forms.Form):
name = forms.CharField(widget=LabelWidget)
business = forms.CharField(widget=LabelWidget(attrs={'size': 5}))
...
I set/add 'label' to the CSS class so I can style these differently. I
used a custom widget over explicit "form.initial['field']" syntax in
my template so I could let the form lay itself out automatically
treating all fields the same way.
-Dave
On Dec 1, 1:45 pm, ChrisK <[EMAIL PROTECTED]> wrote:
> > I think you really need to explain what the real problem is that you're
> > trying to solve, because you're asking a question that is too specific.
>
> Fair enough. It's been several days, so I had to dredge a bit to
> remember :-)
>
> I think the basic issue is that there are some fields in the object
> that I'd like to display but not have editable, and it's not at all
> clear to me how to make that happen in the form processor. The values
> are dynamic, so they can't be in the template.
>
> I'm happy not to replicate the logic inside BoundField.as_widget(), if
> there's some way that the "correct" value is exposed to the
> template...
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Re: Is the initial value of a form field available in the template?
> I often have this need so I created a custom widget where I just set > the readonly attribute on a TextInput widget: > > class LabelWidget(forms.TextInput): Thanks but ... it seems that form.as_p doesn't understand how to display this! --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~--~~~~--~~--~--~---
Re: Is the initial value of a form field available in the template?
On Dec 1, 5:44 pm, ChrisK <[EMAIL PROTECTED]> wrote: > > I often have this need so I created a custom widget where I just set > > the readonly attribute on a TextInput widget: > > > class LabelWidget(forms.TextInput): > > Thanks but ... it seems that form.as_p doesn't understand how to > display this Ooops. Never mind. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~--~~~~--~~--~--~---
Re: Is the initial value of a form field available in the template?
This works: form.initial.fieldname -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
