[FIX] stock: move group inside the view

The goal being to get rid of the `groups_id` feature for backend views

This one is a tricky case

The `create` button should not be visible in the tree and form views
of stock locations when the multi locations feature is not enabled.

If you don't have the group, you do not see the menu bringing
you to the locations list, but though it's still possible
to reach the location form view through a many2one link
on a location field missing the `groups="stock.group_stock_multi_locations"`
e.g. on the stock move form.

If you managed to reach a location form whatever the way,
if you do not have the multi locations enabled,
you shouldn't see the create button.

As we would like to remove the `groups_id` feature of the `ir.ui.view`,
we must find an alternative.
This is the only case using `groups_id` to remove the create/edit
button, so it's not like it's such a common way
to achieve this goal.

The right way to achieve this should be an ACL,
preventing you to create a location at all (even through xmlrpc)
if you do not have the multi-location feature enabled.
Though, currently, there is an ACL giving the right to inventory
managers to create locations, and this is unfortunately impossible
in the ACLs model to make a combined group rule, like you need both
the groups multi-locations and inventory manager to be allowed to create
locations.

Hence, as alternative, we enable/disable the view
removing the create button from the list and form views
when the multi-locations is enabled/disabled in the settings.

Part-of: odoo/odoo#98551

addons/stock/models/res_config_settings.py

@@ -103,11 +103,27 @@ class ResConfigSettings(models.TransientModel):
         if self.group_stock_multi_locations and not previous_group.get('group_stock_multi_locations'):
             # override active_test that is false in set_values
             warehouse_obj.with_context(active_test=True).search([]).int_type_id.active = True
+            # Disable the views removing the create button from the location list and form.
+            # Be resilient if the views have been deleted manually.
+            for view in (
+                self.env.ref('stock.stock_location_view_tree2_editable', raise_if_not_found=False),
+                self.env.ref('stock.stock_location_view_form_editable', raise_if_not_found=False),
+            ):
+                if view:
+                    view.active = False
         elif not self.group_stock_multi_locations and previous_group.get('group_stock_multi_locations'):
             warehouse_obj.search([
                 ('reception_steps', '=', 'one_step'),
                 ('delivery_steps', '=', 'ship_only')
             ]).int_type_id.active = False
+            # Enable the views removing the create button from the location list and form.
+            # Be resilient if the views have been deleted manually.
+            for view in (
+                self.env.ref('stock.stock_location_view_tree2_editable', raise_if_not_found=False),
+                self.env.ref('stock.stock_location_view_form_editable', raise_if_not_found=False),
+            ):
+                if view:
+                    view.active = True
 
         if not was_operations_showed and self.env['stock.picking.type'].with_user(SUPERUSER_ID)._default_show_operations():
             self.env['stock.picking.type'].with_context(active_test=False).sudo().search([

addons/stock/views/stock_location_views.xml

@@ -14,7 +14,7 @@
         <field name="name">stock.location.form</field>
         <field name="model">stock.location</field>
         <field name="arch" type="xml">
-            <form string="Stock Location" create="false">
+            <form string="Stock Location">
                 <field name="company_id" invisible="1"/>
                 <sheet>
                     <div class="oe_button_box" name="button_box">
@@ -61,10 +61,9 @@
         <field name="name">stock.location.form.editable</field>
         <field name="model">stock.location</field>
         <field name="inherit_id" ref="stock.view_location_form"/>
-        <field name="groups_id" eval="[(4, ref('stock.group_stock_multi_locations'))]"/>
         <field name="arch" type="xml">
             <xpath expr="//form" position="attributes">
-                <attribute name="create">true</attribute>
+                <attribute name="create">false</attribute>
             </xpath>
         </field>
     </record>
@@ -91,7 +90,7 @@
         <field name="model">stock.location</field>
         <field name="priority" eval="2"/>
         <field name="arch" type="xml">
-            <tree string="Stock Location" decoration-info="usage=='view'" decoration-danger="usage=='internal'" create="false" multi_edit="1">
+            <tree string="Stock Location" decoration-info="usage=='view'" decoration-danger="usage=='internal'" multi_edit="1">
                 <field name="active" invisible="1"/>
                 <field name="complete_name" string="Location"/>
                 <field name="usage"/>
@@ -105,10 +104,9 @@
         <field name="name">stock.location.tree2.editable</field>
         <field name="model">stock.location</field>
         <field name="inherit_id" ref="stock.view_location_tree2"/>
-        <field name="groups_id" eval="[(4, ref('stock.group_stock_multi_locations'))]"/>
         <field name="arch" type="xml">
             <xpath expr="//tree" position="attributes">
-                <attribute name="create">true</attribute>
+                <attribute name="create">false</attribute>
             </xpath>
         </field>
     </record>