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In an expense record, the unit amount value must never be 0.00. Hence,  I want an error to be raised when the unit amount is 0.00

I added the below code:

    @api.onchange('unit_amount')
    def write(self):
        if self.unit_amount == 0.00:
            raise UserError(_('You are not allowed to create expenses with 0 value'))

The above user error is raised as soon as the Create button is clicked because, unit amount value is by default set as as 0.00

Please provide an alternate suggestion

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Jawaban Terbai

you can use api.constrains

see below code.

@api.constrains('unit_amount')
def check_unit_amount(self):
    if self.unit_amount <= 0:
        raise UserError("You are not allowed to create expenses with 0 value")


Thanks.


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