down payment with original taxes

[IMP] add balance

account_usability/models/account_move.py

@@ -242,6 +242,17 @@ class AccountMoveLine(models.Model):
         compute='_compute_reconcile_string', string='Reconcile', store=True)
     # for optional display in tree view
     product_barcode = fields.Char(related='product_id.barcode', string="Product Barcode")
+    balance = fields.Monetary(
+        string='Balance',
+        default=0.0,
+        currency_field='company_currency_id',
+        compute="_compute_balance",
+        store=True)
+
+    @api.depends("credit", "debit")
+    def _compute_balance(self):
+        for line in self:
+            line.balance = line.debit - line.credit
 
     def show_account_move_form(self):
         self.ensure_one()

account_usability/views/account_move.xml

@@ -70,6 +70,9 @@
         <field name="matching_number" position="after">
             <button title="View Journal Entry Form" type="object" name="show_account_move_form" icon="fa-arrow-right"/>
         </field>
+        <field name="credit" position="after">
+            <field name="balance" sum="Balance" />
+        </field>
     </field>
 </record>
 

pos_usability/views/pos_session.xml

@@ -15,6 +15,20 @@
         <button name="show_journal_items" position="after">
             <button name="%(point_of_sale.action_report_pos_order_all)d" type="action" class="oe_stat_button" icon="fa-table" string="Stats" context="{'search_default_session_id': active_id}"/>
         </button>
+        <xpath
+            expr="//field[@name='cash_register_total_entry_encoding']/parent::group"
+            position="before"
+        >
+        <group>
+            <field
+                    style="text-align:right;margin:0;padding:0;"
+                    name="cash_register_balance_start"
+                    widget="monetary"
+                    options="{'currency_field': 'currency_id'}"
+                    string="Starting Balance"
+                />
+        </group>
+        </xpath>
     </field>
 </record>
 

sale_usability/__init__.py

@@ -1 +1,2 @@
 from . import models
+from . import wizard

sale_usability/wizard/__init__.py

@@ -0,0 +1 @@
+from . import sale_make_invoice_advance

sale_usability/wizard/sale_make_invoice_advance.py

@@ -0,0 +1,37 @@
+from odoo import models
+from odoo.tools import float_is_zero
+
+
+class SaleAdvancePaymentInv(models.TransientModel):
+    _inherit = "sale.advance.payment.inv"
+
+    def _prepare_invoice_values(self, order, name, amount, so_line):
+        """
+        Create as many invoice lines as order lines with their original
+        order line taxes. Lines quantities have the ratio of the advance payment.
+        """
+        invoice_vals = super()._prepare_invoice_values(order, name, amount, so_line)
+        lines = []
+        uom_precision_digits = self.env["decimal.precision"].precision_get(
+            "Product Unit of Measure"
+        )
+        for line in order.order_line:
+            if (
+                not float_is_zero(
+                    # avoids taking lines like previous advance payments
+                    line.product_uom_qty, precision_digits=uom_precision_digits
+                )
+            ):
+                lines.append((0, 0, {
+                    "name": name,
+                    "price_unit": line.price_unit,
+                    "quantity": line.product_uom_qty * amount / order.amount_total,
+                    "product_id": line.product_id.id,
+                    "product_uom_id": line.product_uom.id,
+                    "tax_ids": [(6, 0, line.tax_id.ids)],
+                    "sale_line_ids": [(6, 0, [line.id])],
+                    "analytic_tag_ids": [(6, 0, line.analytic_tag_ids.ids)],
+                    "analytic_account_id": order.analytic_account_id.id or False,
+                }))
+        invoice_vals["invoice_line_ids"] = lines
+        return invoice_vals