Related fields are by default readonly and they should be when it
is possible. A editable related field will write on the related
model and will cause extra unwanted write of data. These unwanted write
can cause performance issues in some case (see odoo/odoo#63865).
Then remove the `readonly=False` of some related fields
(where it is useless):
- In 'mrp.workorder' (mrp): `working_state` and `production_date`
should be readonly.
- In 'purchase.order' (purchase): `product_id` should be readonly.
- In 'purchase.order.line' (purchase): `state` should be readonly.
- In 'product.supplierinfo' (purchase_requisition):
`purchase_requisition_id` should be readonly.
- In 'purchase.requisition' (purchase_requisition):
`product_id` should be readonly.
- In 'product.template' (stock):
`route_from_categ_ids` should be readonly.
- In 'stock.move.line' (stock):
`is_initial_demand_editable` should be readonly.
- In 'stock.move' (stock):
`product_tmpl_id` should be readonly.
- In 'stock.production.lot' (stock):
`product_uom_id` should be readonly.
- In 'stock.quant' (stock):
`product_tmpl_id` should be readonly.
- In 'stock.rule' (stock):
`route_sequence` should be readonly.
- In 'stock.change.product.qty' (stock):
`product_variant_count` should be readonly.
- In 'stock.return.picking.line' (stock):
`uom_id` should be readonly and also because it
is forced by `_prepare_stock_return_picking_line_vals_from_move`,
it should be related to the product uom not the one on the move.
task-2424248
Rémy Voet (ryv)
bec794f776