Improvement on invoice lines and analytic accounts

account_usability/account.py

@@ -70,6 +70,28 @@ class AccountInvoice(models.Model):
         return res
 
 
+class AccountInvoiceLine(models.Model):
+    _inherit = 'account.invoice.line'
+
+    # In the 'account' module, we have related stored field for:
+    # company_id, partner_id
+    currency_id = fields.Many2one(
+        related='invoice_id.currency_id', readonly=True, store=True)
+    invoice_type = fields.Selection(
+        related='invoice_id.type', store=True, readonly=True)
+    date_invoice = fields.Date(
+        related='invoice_id.date_invoice', store=True, readonly=True)
+    commercial_partner_id = fields.Many2one(
+        related='invoice_id.partner_id.commercial_partner_id',
+        store=True, readonly=True)
+    state = fields.Selection(
+        related='invoice_id.state', store=True, readonly=True,
+        string='Invoice State')
+    invoice_number = fields.Char(
+        related='invoice_id.move_id.name', store=True, readonly=True,
+        string='Invoice Number')
+
+
 class AccountFiscalYear(models.Model):
     _inherit = 'account.fiscalyear'
 
@@ -110,6 +132,10 @@ class AccountAccount(models.Model):
 class AccountAnalyticAccount(models.Model):
     _inherit = 'account.analytic.account'
 
+    invoice_line_ids = fields.One2many(
+        'account.invoice.line', 'account_analytic_id', 'Invoice Lines',
+        readonly=True)
+
     @api.multi
     def name_get(self):
         if self._context.get('analytic_account_show_code_only'):