[FIX] hr_timesheet: timesheet uom fallback when AAL's company is False

Current behaviour:
When creating a timesheet, if in the vals passed the AAL doesn't
have a company (possible since it's not required), then the `uom`
of the timesheet is False, which doesn't make sense.

Expected behaviour:
The timesheet `uom` should fallback on the uom of the company
of the project.

Steps to reproduce:
- Install hr_timesheet, Accounting
- Activate the AAL in the settings
- Create a project with an AAL
- Remove the company on the AAL of the project
- In that project create a task and log some timesheet.
- `uom` field should be empty

Reason for the problem:
When setting the `product_uom_id` in the vals when creating/writing
a timesheet, we just take the `project_time_mode_id` on the company
linked to the AAL. The problem is that the company on an AAL is not
a required field, so it can be `False`, leading the setting the val
for `product_uom_id` to `False`.

Fix:
In case the AAL has no company, we get the `uom` from the company
linked to the project.

Affected versions:
- 14.0
- 15.0
- saas-15.2
- 16.0
- saas-16.1
- saas-16.2
- master

opw-3245671

closes odoo/odoo#117834

X-original-commit: 4cce77bd0288eeb3326ba57e91ef11d436f8a0ce
Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>
Signed-off-by: Piryns Victor (pivi) <pivi@odoo.com>

addons/hr_timesheet/models/hr_timesheet.py

@@ -338,7 +338,8 @@ class AccountAnalyticLine(models.Model):
             if not vals.get('partner_id'):
                 vals['partner_id'] = data.partner_id.id
             if not vals.get('product_uom_id'):
-                vals['product_uom_id'] = uom_id_per_company.get(account_per_id[vals['account_id']].company_id, False)
+                company = account_per_id[vals['account_id']].company_id or data.company_id
+                vals['product_uom_id'] = uom_id_per_company.get(company.id, company.project_time_mode_id.id)
         return vals_list
 
     def _timesheet_postprocess(self, values):

addons/hr_timesheet/tests/test_timesheet.py

@@ -552,8 +552,17 @@ class TestTimesheet(TestCommonTimesheet):
     def test_create_timesheet_with_companyless_analytic_account(self):
         """ This test ensures that a timesheet can be created on an analytic account whose company_id is set to False"""
         self.project_customer.analytic_account_id.company_id = False
-        timesheet = self.env['account.analytic.line'].with_user(self.user_employee).create({'unit_amount': 1.0, 'project_id': self.project_customer.id})
-        self.assertFalse(timesheet.product_uom_id, "The product_uom_id of the timesheet should be set to False for its analytic account has no company_id")
+        timesheet_with_project = self.env['account.analytic.line'].with_user(self.user_employee).create(
+            {'unit_amount': 1.0, 'project_id': self.project_customer.id})
+        self.assertEqual(timesheet_with_project.product_uom_id, self.project_customer.company_id.project_time_mode_id,
+                         "The product_uom_id of the timesheet should be equal to the project's company uom "
+                         "if the project's analytic account has no company_id and no task_id is defined in the vals")
+        timesheet_with_task = self.env['account.analytic.line'].with_user(self.user_employee).create({
+            'unit_amount': 1.0, 'task_id': self.task1.id
+        })
+        self.assertEqual(timesheet_with_task.product_uom_id, self.task1.company_id.project_time_mode_id,
+                         "The product_uom_id of the timesheet should be equal to the task's company uom "
+                         "if the project's analytic account has no company_id")
 
     def test_create_timesheet_with_default_employee_in_context(self):
         timesheet = self.env['account.analytic.line'].with_context(default_employee_id=self.empl_employee.id).create({