Add split invoice Action and logic

account_invoice_split_invoice/__manifest__.py

@@ -37,6 +37,7 @@
     "depends": ["account"],
     "external_dependencies": {},
     "data": [
+        "security/ir.model.access.csv",
         "views/account_invoice_split_wizard_view.xml",
     ],
     "demo": [],

account_invoice_split_invoice/security/ir.model.access.csv

@@ -0,0 +1,2 @@
+id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
+access_split_invoice_wizard,access.split.invoice.wizard,model_account_invoice_split_wizard,,1,1,1,1

account_invoice_split_invoice/views/account_invoice_split_wizard_view.xml

@@ -11,7 +11,7 @@
                     <field name="move_id" invisible="1" />
                     <field
                         name="invoice_line_ids"
-                        domain="[('move_id', '=', move_id)]"
+                        domain="[('move_id', '=', move_id), ('exclude_from_invoice_tab', '=', False)]"
                     >
                         <tree editable="bottom" delete="false">
                             <field name="product_id" readonly="1" />

account_invoice_split_invoice/wizards/account_invoice_split_wizard.py

@@ -40,23 +40,54 @@ def split_invoice(self):
         invoice = False
 
         if self.invoice_line_ids:
+
+            # Get Receivable line
+            move_ids = self.invoice_line_ids.mapped('move_id').ids
+            all_lines = self.env['account.move.line'].search([('move_id', 'in', move_ids)])
+            old_receivable_line = all_lines.filtered(
+                lambda l: l.account_id.internal_type == 'receivable')
+
+            # Compute debit val for old/new Receivable line
+            amount_total_new_receivable = 0.0
+            for price_tmp in self.invoice_line_ids:
+                amount_total_new_receivable += price_tmp.price_total
+            amount_total_old_receivable = old_receivable_line.price_unit + amount_total_new_receivable
+
+            # Get old invoice and copy it for new invoice
             old_invoice = self.invoice_line_ids[0].move_id
             if old_invoice.state in ("draft", "posted"):
                 invoice = self._copy_invoice(old_invoice)
+
+                # Create new Receivable line for the new invoice
+                tmp = self.env['account.move.line'].with_context(check_move_validity=False).create({
+                    'price_unit': -amount_total_new_receivable,
+                    'move_id': invoice.id,
+                    'quantity': 1,
+                    'exclude_from_invoice_tab': True,
+                    'account_id': old_receivable_line.account_id.id,
+                })
+
+                # Set new invoices lines with correct IDs from new invoice
+                self.invoice_line_ids = self.invoice_line_ids + tmp
                 was_open = old_invoice.state == "posted"
                 if was_open:
                     old_invoice.button_draft()
                     old_invoice.env.clear()
                 self.invoice_line_ids.write({"move_id": invoice.id})
+
+                # Update old invoice receivable line
+                old_receivable_line.write({"price_unit": amount_total_old_receivable})
                 if was_open:
                     old_invoice.action_post()
                     invoice.action_post()
+
         return invoice
 
     def _copy_invoice(self, old_invoice):
         # Create new invoice
         new_invoice = old_invoice.copy(
             default={"invoice_date": old_invoice.invoice_date}
         )
+        new_invoice.line_ids.unlink()
         new_invoice.invoice_line_ids.unlink()
         return new_invoice