from odoo import models, api
from odoo.tools import float_round

class AccountMoveLine(models.Model):
    _inherit = 'account.move.line'

    @api.model_create_multi
    def create(self, vals_list):
        for vals in vals_list:
            if vals.get('expense_id') and vals.get('price_unit'):
                # Force rounding on expense-related lines to prevent noise from 10-decimal precision
                currency = self.env['res.currency'].browse(vals.get('currency_id')) or self.env.company.currency_id
                vals['price_unit'] = float_round(vals['price_unit'], precision_digits=currency.decimal_places or 2)
        return super().create(vals_list)

    def write(self, vals):
        if 'price_unit' in vals:
            for line in self:
                if line.expense_id:
                    currency = line.currency_id or self.env.company.currency_id
                    vals['price_unit'] = float_round(vals['price_unit'], precision_digits=currency.decimal_places or 2)
        return super().write(vals)