How to post a Log note to Chatter in Odoo 16?

Question

I try to write to Chatter Box, but I have the below error: ValueError: Posting a message should be done on a business document. Use message_notify to send a notification to an user.  My code: @api.onchange("my_field")
def write_to_chatter(self):
​body = "My Message!"
self.message_post(body=body, subtype='my_subtype')
Sources:  Add Message To Chatter From Code in Odoo [1]
Cybrosys || How To Post A Message To Chatter In Odoo 16 [2]

[1] https://www.youtube.com/watch?v=W4nGOGpZpVc
[2] https://www

Vasilis Zartilas · Accepted Answer

*Solved:* I used the write() method, I post a log note when the user saves their data.
def write(self, vals):
if 'name' in vals:
new_value = vals['name']
old_value = self.name.id [1]
if new_value != old_value:
message_body = _("%(user)s changed the Name to %(user_name)s",
user=self.env.user.name,
user_name=self.env['my.module'].search(domain=[('id', '=', new_value)]).name)
self.message_post(body=message_body, message_type='notification')
res = super().write(vals)
return res

[1] https://self.na

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I try to write to Chatter Box, but I have the below error:

My code:

Sources:

Solved:

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