link a custom field to two tables/modul

Question

Hallo everybody,
please be kind and let me know, how to link a custom field from two tables/models, for example a new field from res.partner in sales.order
my case, I add a new field, family_name, in res.partner and then I want to call that field in sales.order. I did, many2one relationship in model sales.oder. but, it doesn't show the value.
Please show me how it works and wish you have a good Karma.
Thanks In advance

Sudhir Arya (ERP Harbor Consulting Services) · Accepted Answer

For that you can use fields.related in sale.order .

Try this:

' partner_family_name': fields.related('partner_id', ' family_name', type='char', string='Partner Family Name', readonly=True, store=True),

fields.related is a field that points to some data inside another field of the current record.

Example:

_columns = {
'partner_id': fields.many2one('res.partner', 'Partner'),
'partner_name': fields.related('partner_id', 'name', type='char', string='Partner Name'),
}

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