Re: how to add a field to a model form when the field is not in the model

[Merrick]

Found the problem, thanks again for all of the help.

It turns out you have to define the extra field above def
__init__(self, *args, **kw) as in:

forms.py

class SomeForm(ModelForm):

checkbox = forms.BooleanField(required=False,
widget=forms.CheckboxInput(), label='some label')

def __init__(self, *args, **kw):
self.request = kw.pop('request')
super(SomeForm, self).__init__(*args, **kw)




On Apr 7, 10:19 am, Merrick  wrote:
> I appreciate all of the help, I was actually showing both Daniel and
> Raj that their suggestions have been tried to no result. To answer
> your question, look up at Raj's suggestion. My code before and after
> trying the suggestions above, is to have message defined outside of
> meta.
>
> Do you have a suggestion aside from that?
>
> Thanks.
>
> On Apr 7, 10:07 am, Tom Evans  wrote:
>
>
>
> > On Wed, Apr 7, 2010 at 5:30 PM, Merrick  wrote:
> > > Thank you.
>
> > > I'll be more specific, here is what I have:
>
> > > views.py
> > > -
> > > ...
> > > if request.method == 'POST':
> > >    some_form = SomeForm(data = request.POST, request=request,
> > > instance=somemodel)
> > >    ...
> > >    if some_form.is_valid():
> > >        some_form_update = some_form.save(commit=False)
> > >        if some_form.cleaned_data['checkbox']:
> > >            #do something
> > >            ...
> > >    return HttpResponseRedirect(reverse('app.views.somemodel_detail',
> > > args=(somemodel.key_id,)))
>
> > > else:
> > >    some_form = SomeForm(request=request, instance = somemodel)
>
> > >    return render_to_response("template.html", {'some_form':
> > > some_form}, context_instance=RequestContext(request))
>
> > > forms.py
> > > 
> > > class SomeForm(ModelForm):
>
> > >   def __init__(self, *args, **kw):
> > >        self.request = kw.pop('request')
> > >        super(SomeForm, self).__init__(*args, **kw)
>
> > >   #I originally had checkbox outside of meta but have tested both
> > > ways now
> > >   #checkbox = forms.BooleanField(required=False, label='Checkbox')
>
> > >    class Meta:
> > >        model = SomeModel
> > >        checkbox = forms.BooleanField(required=False,
> > > label='Checkbox')
>
> > This is wrong. Where did you see to put fields in a form in the Meta class?
>
> > class FooForm(forms.ModelForm):
> >   this_field_aint_on_the_model = forms.CharField(max_length=64)
> >   class Meta:
> >     model = Foo
>
> > Tom

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Re: how to add a field to a model form when the field is not in the model

[Daniel Roseman]

On Apr 7, 6:19 pm, Merrick  wrote:
> I appreciate all of the help, I was actually showing both Daniel and
> Raj that their suggestions have been tried to no result. To answer
> your question, look up at Raj's suggestion. My code before and after
> trying the suggestions above, is to have message defined outside of
> meta.
>
> Do you have a suggestion aside from that?
>
> Thanks.

No other suggestions are needed, because Tom's answer is the correct
one. And I'm also not sure why you say you need to manually include
the html for the checkbox field, you should be able to output it
exactly the same as any other form field.

Are you sure the form is valid when you try and access cleaned_data?
Again, it would be helpful to see what you're doing in the view.
--
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Re: how to add a field to a model form when the field is not in the model

[Merrick]

I appreciate all of the help, I was actually showing both Daniel and
Raj that their suggestions have been tried to no result. To answer
your question, look up at Raj's suggestion. My code before and after
trying the suggestions above, is to have message defined outside of
meta.

Do you have a suggestion aside from that?

Thanks.

On Apr 7, 10:07 am, Tom Evans  wrote:
> On Wed, Apr 7, 2010 at 5:30 PM, Merrick  wrote:
> > Thank you.
>
> > I'll be more specific, here is what I have:
>
> > views.py
> > -
> > ...
> > if request.method == 'POST':
> >    some_form = SomeForm(data = request.POST, request=request,
> > instance=somemodel)
> >    ...
> >    if some_form.is_valid():
> >        some_form_update = some_form.save(commit=False)
> >        if some_form.cleaned_data['checkbox']:
> >            #do something
> >            ...
> >    return HttpResponseRedirect(reverse('app.views.somemodel_detail',
> > args=(somemodel.key_id,)))
>
> > else:
> >    some_form = SomeForm(request=request, instance = somemodel)
>
> >    return render_to_response("template.html", {'some_form':
> > some_form}, context_instance=RequestContext(request))
>
> > forms.py
> > 
> > class SomeForm(ModelForm):
>
> >   def __init__(self, *args, **kw):
> >        self.request = kw.pop('request')
> >        super(SomeForm, self).__init__(*args, **kw)
>
> >   #I originally had checkbox outside of meta but have tested both
> > ways now
> >   #checkbox = forms.BooleanField(required=False, label='Checkbox')
>
> >    class Meta:
> >        model = SomeModel
> >        checkbox = forms.BooleanField(required=False,
> > label='Checkbox')
>
> This is wrong. Where did you see to put fields in a form in the Meta class?
>
> class FooForm(forms.ModelForm):
>   this_field_aint_on_the_model = forms.CharField(max_length=64)
>   class Meta:
>     model = Foo
>
> Tom

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Re: how to add a field to a model form when the field is not in the model

[Tom Evans]

On Wed, Apr 7, 2010 at 5:30 PM, Merrick  wrote:
> Thank you.
>
> I'll be more specific, here is what I have:
>
> views.py
> -
> ...
> if request.method == 'POST':
>    some_form = SomeForm(data = request.POST, request=request,
> instance=somemodel)
>    ...
>    if some_form.is_valid():
>        some_form_update = some_form.save(commit=False)
>        if some_form.cleaned_data['checkbox']:
>            #do something
>            ...
>    return HttpResponseRedirect(reverse('app.views.somemodel_detail',
> args=(somemodel.key_id,)))
>
> else:
>    some_form = SomeForm(request=request, instance = somemodel)
>
>    return render_to_response("template.html", {'some_form':
> some_form}, context_instance=RequestContext(request))
>
>
>
> forms.py
> 
> class SomeForm(ModelForm):
>
>   def __init__(self, *args, **kw):
>        self.request = kw.pop('request')
>        super(SomeForm, self).__init__(*args, **kw)
>
>   #I originally had checkbox outside of meta but have tested both
> ways now
>   #checkbox = forms.BooleanField(required=False, label='Checkbox')
>
>    class Meta:
>        model = SomeModel
>        checkbox = forms.BooleanField(required=False,
> label='Checkbox')

This is wrong. Where did you see to put fields in a form in the Meta class?

class FooForm(forms.ModelForm):
  this_field_aint_on_the_model = forms.CharField(max_length=64)
  class Meta:
model = Foo


Tom

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Re: how to add a field to a model form when the field is not in the model

[Merrick]

Thank you.

I'll be more specific, here is what I have:

views.py
-
...
if request.method == 'POST':
some_form = SomeForm(data = request.POST, request=request,
instance=somemodel)
...
if some_form.is_valid():
some_form_update = some_form.save(commit=False)
if some_form.cleaned_data['checkbox']:
#do something
...
return HttpResponseRedirect(reverse('app.views.somemodel_detail',
args=(somemodel.key_id,)))

else:
some_form = SomeForm(request=request, instance = somemodel)

return render_to_response("template.html", {'some_form':
some_form}, context_instance=RequestContext(request))



forms.py

class SomeForm(ModelForm):

   def __init__(self, *args, **kw):
self.request = kw.pop('request')
super(SomeForm, self).__init__(*args, **kw)

   #I originally had checkbox outside of meta but have tested both
ways now
   #checkbox = forms.BooleanField(required=False, label='Checkbox')

class Meta:
model = SomeModel
checkbox = forms.BooleanField(required=False,
label='Checkbox')

On template.html I have to manually include the html for the message
input of type checkbox.

When I submit the form I get the error KeyError for the form field
"checkbox" that I manually added to template.html and debug points to
the line:

if some_form.cleaned_data['checkbox']:

Thanks again for helping.


On Apr 6, 11:46 pm, raj  wrote:
> On Apr 7, 8:05 am, Merrick  wrote:
>
> > How should I go about adding a field to a model form
> > when the field is not part of the model?
>
>  Define a Custom ModelForm by specifying model in Meta and declare the
> required addnl field there.
> (check-box means boolean, right?). Now set form attribute of your
> Admin class with the name of YourForm.
>
> Rajeesh.

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Re: how to add a field to a model form when the field is not in the model

[Daniel Roseman]

On Apr 7, 4:05 am, Merrick  wrote:
> I added a checkbox form field to my template, and I even tried to add
> it in my forms.py and then in my views.py I check for it like so:
>
> if form.cleaned_data['checkbox_field']:
>   code to send email...
>
> But when I submit the form I get a KeyError. How should I go about
> adding a field to a model form when the field is not part of the
> model?
>
> Thanks.

Defining it in the form should work. What did you do? Show us the
code.
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Re: how to add a field to a model form when the field is not in the model

[raj]

On Apr 7, 8:05 am, Merrick  wrote:
> How should I go about adding a field to a model form
> when the field is not part of the model?

 Define a Custom ModelForm by specifying model in Meta and declare the
required addnl field there.
(check-box means boolean, right?). Now set form attribute of your
Admin class with the name of YourForm.

Rajeesh.

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