How can I prevent a user from editing a field after it's set?

Question

Odoo 14 E

When creating a Customer Invoice and adding invoice lines, I have programmed it so that the Analytic Account is set based on the customer when the line is created.
After the method sets the analytic_account_id, I want to prevent the user from editing it to anything else.
When I try to make the field "readonly" it prevents any writing to it.   I want it to be readonly after setting it so it can't be changed from what the above sets it to.
Any ideas?

Ali Mahmoud · Accepted Answer

Hello,
You can add 'attrs' on relevant field as below:
attrs="{'readonly': [('id', '!=', False)]}

Russ Schneider · Answer

What I needed was:  readonly="True" force_save="True"

Karthik Jain · Answer

Hi,
In your xml view of that field , please try with the below code.
< field name="analytic_account_id" attrs="{'readonly' : [('analytic_account_id', '!=', False)] }" / >
Thanks

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