Run a Business Rule when press button 'Post' on Work Notes or Additional Comments

[TiagoPinto]

Hi, ServiceNow Community, 

I want to run a Business Rule Script when I press the 'Post' button on the work notes or additional comments.
It is possible somehow?

Business Rule conditions:

This When to Run conditions only works if I press save button or submit.

Best Regards,

Tiago Pinto 

[Sebas Di Loreto · Accepted solution]

@TiagoPinto 

When you press POST, you are actually saving a new record on the sys_journal_field table.

Business rules run on the server side so that is the table you would have to use for what you are trying to do but be careful with this table since it will be rather large.

This is an example script to look for the first comment 

var notesGR = new GlideRecord("sys_journal_field");
notesGR.addQuery('name', 'incident');   //looking just for comments on the incident table
notesGR.addQuery('element_id', current.sys_id);
notesGR.addQuery('element', 'comments');
notesGR.orderBy('sys_created_on');   //first comment
notesGR.query();

[TiagoPinto]

Thank you @Sebas Di Loreto 
It worked!