contract/contract_variable_quantity/models/abstract_contract_line.py

# Copyright 2016 Tecnativa - Pedro M. Baeza
# Copyright 2018 Tecnativa - Carlos Dauden
# Copyright 2018 ACSONE SA/NV
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).

from odoo import fields, models


class ContractAbstractContractLine(models.AbstractModel):
    _inherit = 'contract.abstract.contract.line'

    qty_type = fields.Selection(
        selection=[
            ('fixed', 'Fixed quantity'),
            ('variable', 'Variable quantity'),
        ],
        required=True,
        default='fixed',
        string="Qty. type",
    )
    qty_formula_id = fields.Many2one(
        comodel_name="contract.line.qty.formula", string="Qty. formula"
    )