[ADD]Added _recurring_create_invoice

contract_line_invoice_by_average/models/contract_line.py

@@ -1,6 +1,28 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
-from odoo import fields, models
+from odoo import api, fields, models
+
+
+class ContractContract(models.Model):
+    _inherit = 'contract.contract'
+
+    @api.multi
+    def _recurring_create_invoice(self, date_ref=False):
+        invoices = super()._recurring_create_invoice(date_ref)
+        for contract_to_invoice in self:
+            product_avg_qty_dict = {}
+            for each_contract_line in contract_to_invoice.contract_line_ids.filtered(lambda l: l.products_invoiced_by_avg_ids):
+                for each_avg_product in each_contract_line.products_invoiced_by_avg_ids:
+                    product_avg_qty_dict.update(
+                        {each_avg_product.id: each_contract_line.quantity})
+        for each_invoice in invoices:
+            for each_inv_line in each_invoice.invoice_line_ids:
+                if each_inv_line.product_id.id in list(product_avg_qty_dict.keys()):
+                    qty = product_avg_qty_dict.get(
+                        each_inv_line.product_id.id) / each_inv_line.quantity
+                    each_inv_line.quantity = round(qty)
+                    each_inv_line._onchange_product_id_account_invoice_pricelist()
+        return invoices
 
 
 class ContractLine(models.Model):