print serial_no on invoice if a product has serial_no_tracking

ext/custom-addons/dp_reports_account/models/account_invoice.py

@@ -1,7 +1,7 @@
 # Copyright 2018-Today datenpol gmbh (<http://www.datenpol.at>)
 # License OPL-1 or later (https://www.odoo.com/documentation/user/11.0/legal/licenses/licenses.html#licenses).
 
-from odoo import api, models
+from odoo import api, fields, models
 
 
 class AccountInvoice(models.Model):
@@ -28,3 +28,47 @@ class AccountInvoice(models.Model):
                 if sale_order:
                     category['order_id'] = sale_order
         return res
+
+class AccountInvoiceLine(models.Model):
+    _inherit = "account.invoice.line"
+
+    order_line_ids = fields.Many2many(
+        comodel_name='sale.order.line',
+        relation='sale_order_line_invoice_rel',
+        column1='invoice_line_id',
+        column2='order_line_id',
+        string='Order Lines',
+        readonly=True,
+    )
+
+    prod_lot_ids = fields.Many2many(
+        comodel_name='stock.production.lot',
+        compute='_compute_prod_lots',
+        string="Production Lots",
+    )
+
+    lot_formatted_note = fields.Html(
+        string='Formatted Note',
+        compute='_compute_line_lots',
+    )
+
+    @api.multi
+    def _compute_prod_lots(self):
+        for line in self:
+            if not line.order_line_ids:
+                return
+            line.prod_lot_ids = self.mapped(
+                'order_line_ids.move_ids.move_line_ids.lot_id')
+        print('End')
+
+    @api.multi
+    def _compute_line_lots(self):
+        for line in self:
+            if line.prod_lot_ids:
+                note = u'<ul>'
+                note += u' '.join([
+                    u'<li>S/N {0}</li>'.format(lot.name)
+                    for lot in line.prod_lot_ids
+                ])
+                note += u'</ul>'
+                line.lot_formatted_note = note

ext/custom-addons/dp_reports_account/reports/invoice.xml

@@ -85,6 +85,8 @@
                 <t t-foreach="o.order_lines_layouted()" t-as="page" name="lines_layouted">
                     <table class="table table-condensed">
                         <t t-set="discount_is_set" t-value="field_set_in_lines(o.invoice_line_ids, 'discount')"/>
+                        <t t-set="has_serial_number" t-value="o.invoice_line_ids.mapped('prod_lot_ids')"
+                           groups="stock.group_production_lot"/>
                         <thead class="table-header">
                             <tr>
                                 <th class="text-center">Pos.</th>
@@ -182,6 +184,12 @@
                                                 <span t-field="invoice_line.intrastat_id"/>
                                                 <br/>
                                             </span>
+                                            <span t-if="invoice_line.product_id.tracking=='serial'">
+                                                <strong>Serien Nr.:</strong>
+                                                <t t-if="has_serial_number">
+                                                    <span t-field="invoice_line.lot_formatted_note" />
+                                                </t>
+                                            </span>
                                             <span t-field="invoice_line.name"/>
                                             <p t-if="invoice_line.lot_id.notes">
                                                 <span t-field="invoice_line.lot_id.notes"/>