project_parent_task/__init__.py

@@ -0,0 +1 @@
+from . import models

project_parent_task/__manifest__.py

@@ -3,7 +3,7 @@
 
 {
     "name": "project_parent_tasks",
-    "version": "14.0.1.0.0",
+    "version": "14.0.1.1.0",
     "author": "Elabore",
     "website": "https://elabore.coop",
     "maintainer": "Laetitia Da Costa",

project_parent_task/models/__init__.py

@@ -0,0 +1 @@
+from . import project_task

project_parent_task/models/project_task.py

@@ -0,0 +1,21 @@
+
+from odoo import models, fields, api
+
+class Task(models.Model):
+    _inherit = "project.task"
+
+    #overwrite others def _compute_sale_line(self)
+    #we want to skip _compute_sale_line in sale_timesheet/models/project.py file
+    
+    @api.depends('commercial_partner_id', 'sale_line_id.order_partner_id.commercial_partner_id', 'parent_id.sale_line_id', 'project_id.sale_line_id')
+    def _compute_sale_line(self):
+        for task in self:
+            # check sale_line_id and customer are coherent
+            if task.sale_line_id.order_partner_id.commercial_partner_id != task.partner_id.commercial_partner_id:
+                task.sale_line_id = False
+            if not task.sale_line_id:
+                task.sale_line_id = task.parent_id.sale_line_id or task.project_id.sale_line_id
+
+    @api.onchange('parent_id')
+    def _onchange_parent_id(self):
+        self.sale_line_id = self.parent_id.sale_line_id or self.project_id.sale_line_id

project_parent_task/views/project_task.xml

@@ -6,7 +6,7 @@
         <field name="inherit_id" ref="project.view_task_form2" />
         <field name="arch" type="xml">
             <xpath expr="//field[@name='parent_id']" position="attributes">
-                <attribute name="domain">[('project_id','=', active_id)]</attribute>
+                <attribute name="domain">[('project_id','=', project_id)]</attribute>
             </xpath>
         </field>
     </record>