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# Copyright 2019 Tecnativa <vicent.cubells@tecnativa.com>
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
from odoo import api, fields, models
import odoo.addons.decimal_precision as dp
class AccountAnalyticINvoiceLine(models.Model):
_inherit = "account.analytic.invoice.line"
date_start = fields.Date(
string='Start Date',
)
date_end = fields.Date(
string='End Date',
)
previous_revision_id = fields.Many2one(
comodel_name='account.analytic.invoice.line',
string='Previous revision',
help='Relation with previous revision',
)
previous_price = fields.Float(
related='previous_revision_id.price_unit',
readonly=True,
)
variation_percent = fields.Float(
compute='_compute_variation_percent',
store=True,
digits=dp.get_precision('Product Price'),
string='Variation %',
)
@api.multi
@api.depends('price_unit', 'previous_revision_id.price_unit')
def _compute_variation_percent(self):
for line in self:
if not (line.price_unit and line.previous_price):
continue
line.variation_percent = (
(line.price_unit / line.previous_price - 1) * 100)