We have created a new model (v8) with a field 'sale_order_id' (Many2one).

We want a function be run with an @api.depends('sale_order_id.picking_ids.state') on this new model.

That launches an error which says that no _fnct_search is defined on 'picking_ids' (from sale.order) : 'Field picking_ids can not be searched : non-stored function field without fnct_search'.

Is there a solution for this?

Many thanks!