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# Copyright 2019 Tecnativa - Vicent Cubells
# Copyright 2019 Tecnativa - Carlos Dauden
# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
from odoo import api, fields, models
import odoo.addons.decimal_precision as dp
class ContractLine(models.Model):
_inherit = 'contract.line'
previous_price = fields.Float(
string='Previous price',
related='predecessor_contract_line_id.price_unit',
readonly=True,
)
variation_percent = fields.Float(
compute='_compute_variation_percent',
store=True,
digits=dp.get_precision('Product Price'),
string='Variation %',
)
@api.depends('price_unit', 'predecessor_contract_line_id.price_unit')
def _compute_variation_percent(self):
for line in self:
if line.price_unit and line.previous_price:
line.variation_percent = (
(line.price_unit / line.previous_price - 1) * 100)
else:
line.variation_percent = 0.0