selecting the latest subscription if there are multiple subscriptions of

the same service

lib/sf/account.rb

@@ -133,13 +133,11 @@ def self.active_inc_parts(service_name)
   private
 
   def subscriptions
-    Sf.client.query("select Service__r.Id, Service__r.Name, Service_Start_Date__c, Service_End_Date__c from Service_Institution__c where Supporting_Institution__c = \'#{self.Id}\'")
-  end
-
-  def subscription_names
-    subscriptions.map{|s| s.Service__r.Name}
+    # sorting by Service_Start_Date__c in case of multiple subscriptions of the same service
+    Sf.client.query("select Service__r.Id, Service__r.Name, Service_Start_Date__c, Service_End_Date__c from Service_Institution__c where Supporting_Institution__c = \'#{self.Id}\' ORDER BY Service_Start_Date__c")
   end
 
+  # The latest subscription is included only in case of the multiple subscriptions of the same service.
   def start_dates_by_subscription
     start_dates = {}
     subscriptions.each {|s| start_dates[s.Service__r.Name] = s.Service_Start_Date__c}