[IMP] account_banking_mandate: Put binary field as attachment

For not wasting space in DB. Migration scripts included (requires openupgradelib).

account_banking_mandate/__manifest__.py

@@ -7,7 +7,7 @@
 {
     'name': 'Account Banking Mandate',
     'summary': 'Banking mandates',
-    'version': '12.0.1.0.0',
+    'version': '12.0.2.0.0',
     'license': 'AGPL-3',
     'author': "Compassion CH, "
               "Tecnativa, "

account_banking_mandate/migrations/12.0.2.0.0/post-migration.py

@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 Tecnativa - Pedro M. Baeza
+# License AGPL-3 - See http://www.gnu.org/licenses/agpl-3.0.html
+
+from openupgradelib import openupgrade
+from openupgradelib import openupgrade_90
+
+
+@openupgrade.migrate(use_env=True)
+def migrate(env, version):
+    column = openupgrade.get_legacy_name('scan')
+    if openupgrade.column_exists(env.cr, 'account_banking_mandate', column):
+        openupgrade_90.convert_binary_field_to_attachment(
+            env, {'account.banking.mandate': [('scan', None)]},
+        )

account_banking_mandate/migrations/12.0.2.0.0/pre-migration.py

@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 Tecnativa - Pedro M. Baeza
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from openupgradelib import openupgrade
+
+column_renames = {
+    'account_banking_mandate': [
+        ('scan', None),
+    ],
+}
+
+
+@openupgrade.migrate()
+def migrate(cr, version):
+    if openupgrade.column_exists(cr, 'account_banking_mandate', 'scan'):
+        openupgrade.rename_columns(cr, column_renames)

account_banking_mandate/models/account_banking_mandate.py

@@ -53,7 +53,10 @@ class AccountBankingMandate(models.Model):
     )
     signature_date = fields.Date(string='Date of Signature of the Mandate',
                                  track_visibility='onchange')
-    scan = fields.Binary(string='Scan of the Mandate')
+    scan = fields.Binary(
+        string='Scan of the Mandate',
+        attachment=True,
+    )
     last_debit_date = fields.Date(string='Date of the Last Debit',
                                   readonly=True)
     state = fields.Selection([