[IMP]add rma lines to invoices as it is done with PO

rma_account/models/invoice.py

@@ -3,6 +3,7 @@
 # License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl.html)
 
 from odoo import api, fields, models
+from odoo.tools.float_utils import float_compare
 
 
 class AccountInvoice(models.Model):
@@ -14,9 +15,59 @@ class AccountInvoice(models.Model):
             rmas = self.mapped('invoice_line_ids.rma_line_ids')
             inv.rma_count = len(rmas)
 
+    def _prepare_invoice_line_from_rma_line(self, line):
+        qty = line.qty_to_refund
+        if float_compare(
+                qty, 0.0, precision_rounding=line.uom_id.rounding) <= 0:
+            qty = 0.0
+        # Todo fill taxes from somewhere
+        invoice_line = self.env['account.invoice.line']
+        data = {
+            'purchase_line_id': line.id,
+            'name': line.name + ': '+line.name,
+            'origin': line.origin,
+            'uom_id': line.uom_id.id,
+            'product_id': line.product_id.id,
+            'account_id': invoice_line.with_context(
+                {'journal_id': self.journal_id.id,
+                 'type': 'in_invoice'})._default_account(),
+            'price_unit': line.company_id.currency_id.with_context(
+                date=self.date_invoice).compute(
+                line.price_unit, self.currency_id, round=False),
+            'quantity': qty,
+            'discount': 0.0,
+            'account_analytic_id': line.analytic_account_id.id,
+            'rma_line_ids': [(4, line.id)],
+        }
+        return data
+
+    @api.onchange('add_rma_line_id')
+    def on_change_add_rma_line_id(self):
+        if not self.add_rma_line_id:
+            return {}
+        if not self.partner_id:
+            self.partner_id = self.add_rma_line_id.partner_id.id
+
+        new_line = self.env['account.invoice.line']
+        if self.add_rma_line_id not in (
+                self.invoice_line_ids.mapped('rma_line_id')):
+            data = self._prepare_invoice_line_from_rma_line(
+                self.add_rma_line_id)
+            new_line = new_line.new(data)
+            new_line._set_additional_fields(self)
+        self.invoice_line_ids += new_line
+        self.add_rma_line_id = False
+        return {}
+
     rma_count = fields.Integer(
         compute=_compute_rma_count, string='# of RMA')
 
+    add_rma_line_id = fields.Many2one(
+        comodel_name='rma.order.line',
+        string="Add from RMA line",
+        ondelete="set null",
+        help="Create a refund in based on an existing rma_line")
+
     @api.multi
     def action_view_rma_supplier(self):
         action = self.env.ref('rma.action_rma_supplier_lines')

rma_account/models/rma_order_line.py

@@ -218,3 +218,16 @@ class RmaOrderLine(models.Model):
             result['views'] = [(res and res.id or False, 'form')]
             result['res_id'] = invoice_ids[0]
         return result
+
+    @api.multi
+    def name_get(self):
+        res = []
+        if self.env.context.get('rma'):
+            for rma in self:
+                res.append((rma.id, "%s %s qty:%s" % (
+                    rma.name,
+                    rma.product_id.name,
+                    rma.product_qty)))
+            return res
+        else:
+            return super(RmaOrderLine, self).name_get()

rma_account/views/invoice_view.xml

@@ -62,6 +62,42 @@
     </record>
     </data>
 
+    <record id="view_invoice_supplier_rma_form" model="ir.ui.view">
+        <field name="name">account.invoice.supplier.rma</field>
+        <field name="model">account.invoice</field>
+        <field name="inherit_id" ref="account.invoice_supplier_form"/>
+        <field name="arch" type="xml">
+            <field name="reference" position="after">
+                 <field name="add_rma_line_id"
+                        context="{'rma': True}"
+                        domain="[('type', '=', 'supplier'),
+                                 ('partner_id', '=', partner_id)]"
+                        attrs="{'readonly': [('state','not in',['draft'])],
+                         'invisible': ['|', ('state', '=', 'done'),
+                          ('type', '=', 'in_invoice')]}" class="oe_edit_only"
+                        options="{'no_create': True}"/>
+            </field>
+        </field>
+    </record>
+
+    <record id="view_invoice_customer_rma_form" model="ir.ui.view">
+        <field name="name">account.invoice.customer.rma</field>
+        <field name="model">account.invoice</field>
+        <field name="inherit_id" ref="account.invoice_form"/>
+        <field name="arch" type="xml">
+            <field name="payment_term_id" position="after">
+                 <field name="add_rma_line_id"
+                        context="{'rma': True}"
+                        domain="[('type', '=', 'customer'),
+                                 ('partner_id', '=', partner_id)]"
+                        attrs="{'readonly': [('state','not in',['draft'])],
+                         'invisible': ['|', ('state', '=', 'done'),
+                          ('type', '=', 'out_invoice')]}" class="oe_edit_only"
+                        options="{'no_create': True}"/>
+            </field>
+        </field>
+    </record>
+
     <record id="action_invoice_line" model="ir.actions.act_window">
         <field name="name">Invoice Line</field>
         <field name="res_model">account.invoice.line</field>