[REV] sale: keep show_update_pricelist logic in onchange

Recently, onchanges have been converted to computed fields
in sale scope (See #79093).

But we noticed the conversion of the logic allowing users to update
the prices of existing lines if the pricelist was modified didn't behave
correctly as a precomputed computed field.

This commit reverts this change and brings back the behavior of
show_update_pricelist as a field update through onchange.

Fixes two problem:
* Show_update_pricelist value on new sales orders was not saved
* SO created programmatically (not through the interface) always
had show_update_pricelist set as True, even if the pricelist wasn't
modified.
This meant that orders created by a connector (ebay, amazon, ...) showed
the "Update Prices" button even when it made no sence because the prices
were specified by the connector.

closes odoo/odoo#85506

X-original-commit: 99313bcff9f99215fda176f3e92516b1da16e579
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>

addons/sale/models/sale_order.py

@@ -289,7 +289,6 @@ class SaleOrder(models.Model):
                                                   string='Authorized Transactions', copy=False)
     show_update_pricelist = fields.Boolean(
         string='Has Pricelist Changed',
-        compute='_compute_show_update_pricelist', store=True, readonly=True, precompute=True,
         help="Technical Field, True if the pricelist was changed;\n"
              " this will then display a recomputation button")
     tag_ids = fields.Many2many('crm.tag', 'sale_order_tag_rel', 'order_id', 'tag_id', string='Tags')
@@ -555,10 +554,10 @@ class SaleOrder(models.Model):
                 }
             }
 
-    @api.depends('pricelist_id')
-    def _compute_show_update_pricelist(self):
-        for order in self:
-            order.show_update_pricelist = order.order_line and order.pricelist_id and order._origin.pricelist_id != self.pricelist_id
+    @api.onchange('pricelist_id')
+    def _onchange_pricelist_id_show_update_prices(self):
+        if self.order_line and self.pricelist_id and self._origin.pricelist_id != self.pricelist_id:
+            self.show_update_pricelist = True
 
     def update_prices(self):
         self.ensure_one()

addons/sale/views/sale_order_views.xml

@@ -257,7 +257,7 @@
                             <label for="date_order" string="Order Date"/>
                         </div>
                         <field name="date_order" attrs="{'required': [('state', 'in', ['sale', 'done'])], 'invisible': [('state', 'in', ['draft', 'sent'])]}" nolabel="1"/>
-                        <field name="show_update_pricelist" invisible="1" force_save="1"/>
+                        <field name="show_update_pricelist" invisible="1"/>
                         <label for="pricelist_id" groups="product.group_product_pricelist"/>
                         <div groups="product.group_product_pricelist" class="o_row">
                             <field name="pricelist_id" options="{'no_open':True,'no_create': True}"/>