before sync

app/models/lookup.rb

@@ -21,14 +21,37 @@ class Lookup < ApplicationRecord
   #   Lookup.select("value, name").where("lookup_type = ?", lookup_type ).order("name asc").map { |r| [r.name, r.value] }  
   # end
 
+  def self.get_checkin_time_limit
+    time_limit = 5
+
+    lookup = Lookup.find_by_lookup_type('checkin_time_limit')
+    if !lookup.nil?
+      time_limit = lookup.value.to_i
+    end
+
+    return time_limit
+  end
+
   def self.sync_url
+    url = ""
+
     lookup = Lookup.find_by_lookup_type('sync_data')
-    return lookup.value
+    if !lookup.nil?
+      url = lookup.value
+    end
+
+    return url
   end
 
   def self.get_sync_token
+    token = ""
+
     lookup = Lookup.find_by_lookup_type('sync_token')
-    return lookup.value
+    if !lookup.nil?
+      token = lookup.value
+    end
+
+    return token
   end
 
   def self.collection_of(type)