I'm not sure if I understand the problem correctly, but I think this might
be what you're looking to do.
In your ModelForm, simply exclude the fields you don't want or explicitly
include only the fields you do want to use. Those are both under the
ModelForm's Meta class.
e.g.
# Include only these fields
class Meta:
fields = ('fieldA', 'fieldB', 'fieldD')
# Or Exclude a field
class Meta:
exclude = ('fieldC',)
https://docs.djangoproject.com/en/dev/topics/forms/modelforms/#using-a-subset-of-fields-on-the-form
On Sat, Jun 9, 2012 at 4:54 PM, ydjango <neerash...@gmail.com> wrote:
> From 1.2 release notes (backward incompatible change):
> "Much of the validation work for ModelForms has been moved down to the
> model level. As a result, the first time you call
> ModelForm.is_valid(), access ModelForm.errors or otherwise trigger
> form validation, your model will be cleaned in-place. This conversion
> used to happen when the model was saved. If you need an unmodified
> instance of your model, you should pass a copy to the ModelForm
> constructor.
>
> I am migrating from 1.1 to 1.3. Some of my code rely on model not
> being cleaned in place. As some fields become read only and should
> not be changed. This 1.2 functionality makes those field empty. Also I
> save the model and not the form in these cases.
>
> So as per documentation, to get around it, I need to pass a copy of
> model to form. What is the best way to get a copy of model:
> 1) use deepcopy?
> 2) get the object twice from db? (slow as more db access)
>
> Any downsides to using deepcopy? Anything I need to be careful about?
>
> Anyone else also had this issue and any suggestions.
>
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