[IMP] survey: add gc of empty survey userinputs in the autovacuum cron

addons/survey/__openerp__.py

@@ -26,7 +26,6 @@ sent mails with personal token for the invitation of the survey.
         'views/survey_result.xml',
         'wizard/survey_email_compose_message.xml',
         'data/survey_stages.xml',
-        'data/survey_cron.xml'
     ],
     'demo': ['data/survey_demo_user.xml',
              'data/survey_demo_feedback.xml',

addons/survey/data/survey_cron.xml

-<?xml version="1.0"?>
-<openerp>
-    <data noupdate="1">
-        <!-- Remove unused user inputs -->
-        <record forcecreate="True" id="ir_cron_clean_empty_surveys"
-            model="ir.cron">
-            <field name="name">Run Clean empty surveys</field>
-            <field name="active" eval="True"/>
-            <field name="user_id" ref="base.user_root"/>
-            <field name="interval_number">1</field>
-            <field name="interval_type">hours</field>
-            <field name="numbercall">-1</field>
-            <field name="doall" eval="False"/>
-            <field name="model" eval="'survey.user_input'"/>
-            <field name="function" eval="'do_clean_emptys'"/>
-            <field name="args" eval="'()'"/>
-        </record>
-    </data>
-</openerp>

addons/survey/models/__init__.py

@@ -2,3 +2,4 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 import survey
+import ir_autovacuum

addons/survey/models/ir_autovacuum.py

+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import api, models
+
+
+class AutoVacuum(models.AbstractModel):
+    _inherit = 'ir.autovacuum'
+
+    @api.model
+    def power_on(self, *args, **kwargs):
+        self.env['survey.user_input'].do_clean_emptys()
+        return super(AutoVacuum, self).power_on(*args, **kwargs)