[16.0][REF] purchase_triple_discount: Consolidate discount in std field #2599
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Continuation of #2317 and following OCA/account-invoicing#1840
Try to fix the current red CI state.
Until now, the triple discount feature did use the standard Odoo field as the first discount field, adding only extra fields for the second and the third discount. This implied we had to override any function using discount to consider the other discounts properly.
By adding an extra field discount1 to store the first discount, it allows to redefine the standard discount field to a computed field that will consolidate the triple discount from the other fields, and avoid the need to redefine anything relying on the discount field as it will already consider the triple discounts.
@Tecnativa