[IMP] sale: option to generate single/multiple invoice from so

before this commit, if there is multiple sale order for a
customer, and if we try to create new invoices for this
orders from the tree view, it creates one invoices for
all the orders.

there will be cases, where we have to create separate
invoices for each orders.

after this commit, a boolean will be introduced in the
wizard, by which user can decide one invoice or multiple
invoice by grouping sale order.

closes odoo/odoo#128351

Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>

addons/sale/wizard/sale_make_invoice_advance.py

@@ -80,6 +80,10 @@ class SaleAdvancePaymentInv(models.TransientModel):
     # UI
     display_draft_invoice_warning = fields.Boolean(compute="_compute_display_draft_invoice_warning")
     display_invoice_amount_warning = fields.Boolean(compute="_compute_display_invoice_amount_warning")
+    consolidated_billing = fields.Boolean(
+        string="Consolidated Billing", default=True,
+        help="Create one invoice for all orders related to same customer and same invoicing address"
+    )
 
     #=== COMPUTE METHODS ===#
 
@@ -191,7 +195,7 @@ class SaleAdvancePaymentInv(models.TransientModel):
     def _create_invoices(self, sale_orders):
         self.ensure_one()
         if self.advance_payment_method == 'delivered':
-            return sale_orders._create_invoices(final=self.deduct_down_payments)
+            return sale_orders._create_invoices(final=self.deduct_down_payments, grouped=not self.consolidated_billing)
         else:
             self.sale_order_ids.ensure_one()
             self = self.with_company(self.company_id)

addons/sale/wizard/sale_make_invoice_advance_views.xml

@@ -17,6 +17,7 @@
                 <group>
                     <field name="sale_order_ids" invisible="1"/>
                     <field name="count" attrs="{'invisible': [('count', '=', 1)]}"/>
+                    <field name="consolidated_billing" attrs="{'invisible': [('count', '=', 1)]}"/>
                     <field name="advance_payment_method" class="oe_inline"
                         widget="radio"
                         attrs="{'invisible': [('count', '&gt;', 1)]}"/>