Thank you for your answer, Cybrosys Techno Solutions Pvt.Ltd. Unfortunately that did not work

Also thank you Niyas for your answer. When I take a look into the log I can see some entries like those below. I trigger the action manually by button click.

Hi,

Please try this you can use the update() method directly on the search result to update the 'mobile' field for all contacts in a single database query:

# Update all contacts' mobile fields to "1234"
contacts = env['res.partner'].search([])
contacts.update({'mobile': '1234'})


Hope it helps.

Hi,

It is expected to update the mobile number of contacts to 1234 . If this is not updating, see the result you get when searching in contacts.

Just add log(str(contacts)) and see the Logging menu under Settings -> Technical. Also you can add sudo to bypass access rights if any.

Also how you trigger this server action ? Using run button or ?

Thanks