[ckan-dev] Custom dataset form while keeping free extras

[Samuele Santi]

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I need to add some extra fields to the dataset form, while keeping the
"free extras" functionality.

I spotted this comment in the package_metadata_fields.html template in
the example plugin shipped with ckan master:

```
{# Remove 'free extras' from the package form. If you're using
convert_to/from_extras() as we are with our 'custom_text' field below
then you need to remove free extras from the form, or editing your
custom field won't work. #}
```

I suppose that this means the custom field gets duplicated in the form
(both as the custom field and in the "extras"), with all the
consequences. Am I right?

Is there any "proper" way to add extra fields (with custom editing
widget / validation / ...) while keeping the free key/value fields
functionality?

Did anybody already face this problem and come up with a solution?
Are there any good examples of customized forms like this?

Thanks,

- -- 
Samuele Santi
Trento RISE
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