add gym module

gym/models/calendar_event.py

@@ -0,0 +1,15 @@
+# See LICENSE file for full copyright and licensing details.
+
+from odoo import api, models
+
+
+class CalendarEvent(models.Model):
+
+    _inherit = 'calendar.event'
+
+    @api.model
+    def inactive_rule(self):
+        rule_rec = self.env.ref('calendar.calendar_event_rule_employee',
+                                raise_if_not_found=False)
+        if rule_rec and rule_rec.active:
+            rule_rec.active = False