I'd like to know if there is a way that I could compute a boolean field to be true when a certain field of another model has the value of 0. Does anyone know how could this be done?. The exercise would be a boolean set in the sale.order object that depends on the behaviour of the amount_residual of the invoice of the respective sale, when the residual is equal 0, the boolean in sale.order should be set to true meaning that the sale has been closed.
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As your first attempt, it can be:
When `amount_residual = 0`, you can search of its linked SO, via searching self.id in `invoice_ids` field of sale.order, if it exists in any you can set your boolean `is_closed = True`.
But search for better solution too I know there will be!
why do you need to wait for a flag? you can directly check the amount_residual is zero and set the sale to clossed.