I have done something fairly similar.
I wound up using two separate fields (rather than a single
MultiValueField). The first one is based on a TextField and its formfield
is based on a MultipleChoiceField. On form creation of forms that use this
field, I append [("_OTHER", "---OTHER---")] to the set of choices. The
second one is just a standard CharField. That field is set to be hidden.
I add a javascript handler to the first field such that whenever its value
changes, if it includes "_OTHER" the second field is displayed otherwise it
is hidden. Both fields are validated and saved as needed. When I am
working w/ the underlying models, I know to use the second field's value
iff the first field's value contains "_OTHER." If it doesn't, I just
ignore it.
On Monday, January 26, 2015 at 3:29:47 PM UTC-7, Paul Royik wrote:
>
> I need to build a form field with a special select field.
> Select field should have option other on which text field is shown. After
> entering value in textfield, it should be validated, saved and then refered
> to initial form.
>
> How this can be done?
>
>
> I'm trying to override MultiValueField and MultiWidget, but no luck.
>
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