[FIX] project: fix wrong subtask mapping while project copy

Steps to reproduce:
1. Install module Project
2. Enable Sub-Task feature in settings
3. Create a project A and add a task with subtasks with depth level >1.
4. Duplicate project A

Issue:
Duplicated child subtasks (depth >1) are not being mapped with the newly created project(duplicated one).

Cause:
Only mapping parent task due to wrong filter values.

Solution:
If the `display_project_id` of all tasks to duplicate (subtasks
included) are linked to the project to duplicate, then the
'display_project_id' of duplicated tasks for those tasks will be
the newly created project on all child subtasks record sets.

closes odoo/odoo#115261

X-original-commit: 31a966a9a97c28c36b819e7481809f2cf4565fb5
Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>

addons/project/models/project.py

@@ -585,7 +585,7 @@ class Project(models.Model):
             new_task_ids.append(new_task.id)
             all_subtasks = new_task._get_all_subtasks()
             if all_subtasks:
-                new_subtasks += new_task.child_ids.filtered(lambda child: child.display_project_id == self)
+                new_subtasks += all_subtasks.filtered(lambda child: child.display_project_id == self)
         project.write({'tasks': [Command.set(new_task_ids)]})
         new_subtasks.write({'display_project_id': project.id})
         return True

addons/project/tests/test_project_subtasks.py

@@ -215,7 +215,7 @@ class TestProjectSubtasks(TestProjectCommon):
                 Command.create({'name': 'child 1'}),
                 Command.create({'name': 'child 2', 'display_project_id': self.project_goats.id}),
                 Command.create({'name': 'child 3', 'display_project_id': self.project_pigs.id}),
-                Command.create({'name': 'child 4 with subtask', 'child_ids': [Command.create({'name': 'child 5'})]}),
+                Command.create({'name': 'child 4 with subtask', 'child_ids': [Command.create({'name': 'child 5'}), Command.create({'name': 'child 6 with project', 'display_project_id': self.project_goats.id})]}),
                 Command.create({'name': 'child archived', 'active': False}),
             ],
         })

doc/cla/corporate/ibees-consulting.md

@@ -0,0 +1,15 @@
+United Kingdom, 2022-12-31
+
+iBees Consulting agrees to the terms of the Odoo Corporate Contributor License
+Agreement v1.0.
+
+I declare that I am authorized and able to make this agreement and sign this
+declaration.
+
+Signed,
+
+iBees Consulting kamran@ibees.co.uk https://github.com/ibees-consulting
+
+List of contributors:
+
+Syed Kamran Ali go4site@gmail.com https://github.com/ska-ibees