purchase_requisition.py

# Copyright 2021 Tecnativa - Víctor Martínez
# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).

from odoo import api, models


class PurchaseRequisition(models.Model):
    _inherit = "purchase.requisition"

    @api.model
    def create(self, vals):
        """It is not possible to intercept _run_buy() to add lines instead of creating
        multiple records.
        This method is used to find if there is any previously created record with
        the same values to add the line instead of creating a new record.
        """
        if self.env.context.get("grouped_by_procurement") and vals.get(
            "procurement_group_id"
        ):
            domain = self._prepare_purchase_requisition_grouped_domain(vals)
            purchase_requisition = self.search(domain)
            if purchase_requisition:
                purchase_requisition.write({"line_ids": vals.get("line_ids")})
                return purchase_requisition
        return super().create(vals)

    def _prepare_purchase_requisition_grouped_domain(self, vals):
        return [
            ("procurement_group_id", "=", vals.get("procurement_group_id")),
            ("state", "=", "draft"),
        ]