Dynamic form elements using attrs

So far, we have only looked into changing forms depending on the user's groups (the groups attribute on elements and the groups_id field on inherited views), but nothing more. This recipe will show you how to change forms based on the content of some fields in it.

How to do it...

1. Define an attribute attrs on some form element:

   <field name="parent_id"
          attrs="{'invisible': [('is_company', '=', True)],
          'required': [('is_company', '=', False)]}" />

2. Take care that all the fields you refer to are available on your form:

   <field name="is_company" invisible="True" />

This will make the field parent_id invisible if the partner is a company, and required if it's not a company.

How it works...

The attrs attribute contains a dictionary with the keys invisible, required, and readonly (all of them optional). The values are domains that may refer to the fields existing on the form (and really only those, so no dotted paths), and the whole dictionary is...