[FIX] stock_move: show source document

Install stock and sale. Create a sale with 2+ products, save and
confirm.
Look for the created picking.

There will be no source doument, because of
cb618e9a99
the behavior has changed when there are multiple source
document, possibly to avoid displaying the wrong source if they
differ.

Adding the possibility to display multiple source documents, eventually
truncating the list

opw-2117886

closes odoo/odoo#40098

X-original-commit: baad02d01b86a8d036524b789f046a54a878a729
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/stock/models/stock_move.py

@@ -907,8 +907,16 @@ class StockMove(models.Model):
         """ return create values for new picking that will be linked with group
         of moves in self.
         """
-        origins = set(self.filtered(lambda m: m.origin).mapped('origin'))
-        origin = len(origins) == 1 and origins.pop() or False
+        origins = self.filtered(lambda m: m.origin).mapped('origin')
+        origins = list(dict.fromkeys(origins)) # create a list of unique items
+        # Will display source document if any, when multiple different origins
+        # are found display a maximum of 5
+        if len(origins) == 0:
+            origin = False
+        else:
+            origin = ','.join(origins[:5])
+            if len(origins) > 5:
+                origin += "..."
         partners = self.mapped('partner_id')
         partner = len(partners) == 1 and partners.id or False
         return {