sale_usability: Add sale_ids and sale_count on account.invoice

Show sale_line_ids on invoice line form view

sale_usability/__manifest__.py

@@ -30,6 +30,7 @@ This module has been written by Alexis de Lattre from Akretion
         'sale_view.xml',
         'sale_report_view.xml',
         'product_view.xml',
+        'account_invoice_view.xml',
         ],
     'installable': True,
 }

sale_usability/account_invoice.py

@@ -2,13 +2,46 @@
 # @author Alexis de Lattre <alexis.delattre@akretion.com>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
-from odoo import models
+from odoo import api, fields, models
 from collections import OrderedDict
 
 
 class AccountInvoice(models.Model):
     _inherit = 'account.invoice'
 
+    # sale_ids is kind of the symetric field of invoice_ids on sale.order
+    sale_ids = fields.Many2many(
+        'sale.order', string='Sale Orders', compute="_compute_sale_ids",
+        readonly=True, copy=False)
+    sale_count = fields.Integer(
+        string='Sale Order Count', compute='_compute_sale_ids', readonly=True)
+
+    @api.depends('invoice_line_ids.sale_line_ids')
+    def _compute_sale_ids(self):
+        for invoice in self:
+            if invoice.type == 'out_invoice':
+                sales = invoice.invoice_line_ids.mapped('sale_line_ids').\
+                    mapped('order_id')
+                invoice.sale_ids = sales.ids
+                invoice.sale_count = len(sales.ids)
+            else:
+                invoice.sale_ids = []
+                invoice.sale_count = 0
+
+    def show_sale_orders(self):
+        self.ensure_one()
+        action = self.env.ref('sale.action_orders').read()[0]
+        sales = self.sale_ids
+        if len(sales) > 1:
+            action['domain'] = [('id', 'in', sales.ids)]
+        else:
+            action.update({
+                'res_id': sales.id,
+                'view_mode': 'form,tree,kanban,calendar,pivot,graph,activity',
+                'views': False,
+                })
+        return action
+
     def py3o_lines_layout_groupby_order(self, subtotal=True):
         # This method is an alternative to the method py3o_lines_layout()
         # defined above: you just have to change the call in the invoice

sale_usability/account_invoice_view.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2019 Akretion France (http://www.akretion.com/)
+  @author: Alexis de Lattre <alexis.delattre@akretion.com>
+  License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+-->
+
+<odoo>
+
+
+<record id="account_invoice_form" model="ir.ui.view">
+    <field name="name">sale_usability.customer.invoice.form</field>
+    <field name="model">account.invoice</field>
+    <field name="inherit_id" ref="sale.account_invoice_form"/>
+    <field name="arch" type="xml">
+        <div name="button_box" position="inside">
+            <button name="show_sale_orders"
+                    type="object"
+                    class="oe_stat_button"
+                    icon="fa-pencil-square-o"
+                    attrs="{'invisible': [('sale_count', '=', 0)]}">
+                <field name="sale_count" widget="statinfo" string="Sale Orders"/>
+            </button>
+        </div>
+    </field>
+</record>
+
+<record id="account_invoice_line_form" model="ir.ui.view">
+    <field name="name">sale_usability.invoice.line.form</field>
+    <field name="model">account.invoice.line</field>
+    <field name="inherit_id" ref="sale.account_invoice_line_form"/>
+    <field name="arch" type="xml">
+        <xpath expr="//field[@groups='analytic.group_analytic_tags']" position="after">
+            <field name="sale_line_ids" widget="many2many_tags" attrs="{'invisible': [('invoice_type', 'in', ('in_invoice', 'in_refund'))]}"/>
+        </xpath>
+    </field>
+</record>
+
+</odoo>

sale_usability/sale.py

@@ -4,7 +4,6 @@
 
 from odoo import models, fields, api
 from odoo.tools import float_is_zero
-from collections import OrderedDict
 
 
 class SaleOrder(models.Model):