Remove duplicate ids when searching parent menu

This prevents to generate a too big SQL query and also avoid to fail in the
SQLite bug: https://www.sqlite.org/src/tktview?name=61fe97454c

issue6514
review34131002

trytond/ir/ui/menu.py

@@ -4,6 +4,7 @@ from itertools import groupby
 
 from trytond.model import ModelView, ModelSQL, fields, sequence_ordered
 from trytond.transaction import Transaction
+from trytond.tools import grouped_slice
 from trytond.pool import Pool
 from trytond.rpc import RPC
 
@@ -178,10 +179,12 @@ class UIMenu(sequence_ordered(), ModelSQL, ModelView):
             return menus
 
         if menus:
-            parent_ids = [x.parent.id for x in menus if x.parent]
-            parents = cls.search([
-                    ('id', 'in', parent_ids),
-                    ])
+            parent_ids = {x.parent.id for x in menus if x.parent}
+            parents = set()
+            for sub_parent_ids in grouped_slice(parent_ids):
+                parents.update(cls.search([
+                            ('id', 'in', list(sub_parent_ids)),
+                            ]))
             menus = [x for x in menus
                 if (x.parent and x.parent in parents) or not x.parent]