Integrating the Chatter function into a custom model for portal view requires careful setup to ensure both viewing and messaging capabilities are enabled for portal users.

  Ensure your custom model inherits from 'mail.thread' and 'mail.activity.mixin'. This is crucial for Chatter functionality.

  Verify the access rights for portal users on your custom model. Portal users must have read access, and if you want them to send messages, create or write access might also be necessary.

  Customize the portal access rules. Sometimes, the lack of messaging capability is due to restrictive portal access rules. Ensure that the rules allow for message posting.

  Check the implementation of the Chatter in your portal template. Ensure that the 'message_post' method is correctly called when messages are sent from the portal. This might require custom controller routes.

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Hi ,

Your code with portal.message_thread is correct — it displays the chatter but, by default, portal users can only view messages.

To let them send messages, make sure your custom model inherits:

_inherit = ['mail.thread', 'mail.activity.mixin', 'portal.mixin']

Then, extend the portal QWeb template to include the chatter input box, since Odoo doesn’t enable message posting for portal users out of the box.

Hope it helps