[update] task form view

views/project_task_views.xml

@@ -21,8 +21,11 @@
             <field name="inherit_id" ref="project.view_task_form2" />
             <field name="arch" type="xml">
                 <xpath expr="//notebook" position="before">
-                    <group>
-                        <field name="participant_ids" widget="one2many">
+                    <label for="participant_ids" />
+                    <field name="participant_ids"
+                           widget="one2many"
+                           domain="[('project_id', '=', context.get('active_id'))]"
+                    >
                         <tree
                             string="Participants"
                             editable="top"
@@ -40,7 +43,6 @@
                             <field name="eligible" />
                         </tree>
                     </field>
-                    </group>
                 </xpath>
                 <xpath expr="//field[@name='user_id']" position="after">
                     <field name="formateur_id" />