add activities to wiki pages

document_page/models/document_page.py

@@ -9,7 +9,7 @@ class DocumentPage(models.Model):
     """This class is use to manage Document."""
 
     _name = "document.page"
-    _inherit = ['mail.thread']
+    _inherit = ['mail.thread', 'mail.activity.mixin']
     _description = "Document Page"
     _order = 'name'
 

document_page/views/document_page.xml

@@ -84,6 +84,7 @@
                 </sheet>
                 <div class="oe_chatter">
                     <field name="message_follower_ids" widget="mail_followers"/>
+                    <field name="activity_ids" widget="mail_activity"/>
                     <field name="message_ids" widget="mail_thread"/>
                 </div>
             </form>