[IMP] stock_dropshipping: remove warehouse_id from dropship types

When a picking is a dropship type (i.e. having the vendors as source
location and the customers as destination locations), then the
warehouse_id is removed.
This will add consistency between automatically generated "Dropship"
type and the manually created ones.

Part of task-2985735

closes odoo/odoo#106039

X-original-commit: efe7cfb0b94f485908c4e8510bd0ba6ff154018b
Signed-off-by: Arnold Moyaux (arm) <arm@odoo.com>
Signed-off-by: Quentin Wolfs (quwo) <quwo@odoo.com>

addons/stock_dropshipping/models/stock.py

@@ -34,3 +34,13 @@ class StockPicking(models.Model):
     def _compute_is_dropship(self):
         for picking in self:
             picking.is_dropship = picking.location_dest_id.usage == 'customer' and picking.location_id.usage == 'supplier'
+
+
+class StockPickingType(models.Model):
+    _inherit = 'stock.picking.type'
+
+    @api.depends('default_location_src_id', 'default_location_dest_id')
+    def _compute_warehouse_id(self):
+        super()._compute_warehouse_id()
+        if self.default_location_src_id.usage == 'supplier' and self.default_location_dest_id.usage == 'customer':
+            self.warehouse_id = False