[ADD] - new module Product Contract Variable Quantity

product_contract_variable_quantity/models/__init__.py

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+# Copyright 2018 ACSONE SA/NV
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from . import contract_line
+from . import product_template
+from . import sale_order_line

product_contract_variable_quantity/models/contract_line.py

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+# Copyright 2017 LasLabs Inc.
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+
+from odoo import api, fields, models
+
+
+class AccountAnalyticInvoiceLine(models.Model):
+    _inherit = 'account.analytic.invoice.line'
+
+    @api.onchange('product_id')
+    def onchange_product(self):
+        super(AccountAnalyticInvoiceLine, self).onchange_product()
+        if self.product_id.is_contract:
+            self.qty_type = self.product_id.qty_type
+            self.qty_formula_id = self.product_id.qty_formula_id

product_contract_variable_quantity/models/product_template.py

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+# Copyright 2018 ACSONE SA/NV
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import api, fields, models
+
+
+class ProductTemplate(models.Model):
+    _inherit = 'product.template'
+
+    qty_type = fields.Selection(
+        selection=[
+            ('fixed', 'Fixed quantity'),
+            ('variable', 'Variable quantity'),
+        ],
+        required=False,
+        default='fixed',
+        string="Qty. type",
+    )
+    qty_formula_id = fields.Many2one(
+        comodel_name="contract.line.qty.formula", string="Qty. formula"
+    )
+
+    @api.onchange('is_contract')
+    def _change_is_contract(self):
+        """ Clear the relation to contract_template_id when downgrading
+        product from contract
+        """
+        super(ProductTemplate, self)._change_is_contract()
+        if not self.is_contract:
+            self.qty_type = False
+            self.qty_formula_id = False

product_contract_variable_quantity/models/sale_order_line.py

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+# -*- coding: utf-8 -*-
+# Copyright 2017 LasLabs Inc.
+# Copyright 2017 ACSONE SA/NV.
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from odoo import api, fields, models, _
+from odoo.exceptions import ValidationError
+
+
+class SaleOrderLine(models.Model):
+    _inherit = 'sale.order.line'
+
+    qty_type = fields.Selection(
+        selection=[
+            ('fixed', 'Fixed quantity'),
+            ('variable', 'Variable quantity'),
+        ],
+        required=False,
+        default='fixed',
+        string="Qty. type",
+    )
+    qty_formula_id = fields.Many2one(
+        comodel_name="contract.line.qty.formula", string="Qty. formula"
+    )
+
+    @api.onchange('product_id')
+    def onchange_product(self):
+        super(SaleOrderLine, self).onchange_product()
+        if self.product_id.is_contract:
+            self.qty_type = self.product_id.qty_type
+            self.qty_formula_id = self.product_id.qty_formula_id
+
+    @api.multi
+    def _prepare_contract_line_values(self, contract):
+        values = super(SaleOrderLine, self)._prepare_contract_line_values(
+            contract
+        )
+        values['qty_type'] = self.qty_type
+        values['qty_formula_id'] = self.qty_formula_id.id
+        return values