[FIX] handle multiple or empty mail servers

[FIX] use only confirmed mail servers

models.py

@@ -53,7 +53,12 @@ class FetchMailImmediately(models.AbstractModel):
 
     @api.model
     def get_last_update_time(self):
-        return self.env['fetchmail.server'].sudo().search([]).run_time
+        res = self.env['fetchmail.server'].sudo().search([('state', '=', 'done')])
+        array = [r.run_time for r in res]
+        if array:
+            return array[0]
+        else:
+            return None
 
     @api.model
     def run_fetchmail_manually(self):

static/src/js/main.js

@@ -38,8 +38,11 @@ openerp.mail_check_immediately = function(instance, local) {
         get_last_fetched_time: function(){
             var _this = this;
             this.imm_model.call('get_last_update_time', {context: new instance.web.CompoundContext()}).then(function(res){
-//                using jQuery timeago library
-                _this.$el.find('span.oe_view_manager_fetch_mail_imm_field').html($.timeago(res));
+                var value;
+                if (res)
+                    value = $.timeago(res);
+                value = value || 'undefined';
+                _this.$el.find('span.oe_view_manager_fetch_mail_imm_field').html(value);
             })
         },