[api] store explicit last issue update time

src/api/app/models/issue_tracker.rb

@@ -79,10 +79,16 @@ def issue(issue_id)
   end
 
   def update_issues()
-    oldest_time = Issue.find( :first, :order => :updated_at).updated_at
-    result = bugzilla_server.search(:last_change_time => oldest_time)
+    update_time_stamp = Time.at(Time.now.to_f - 5)
 
-    return private_fetch_issues(ids)
+    result = bugzilla_server.search(:last_change_time => self.issues_updated)
+
+    ret = private_fetch_issues(ids)
+
+    self.issues_updated = update_time_stamp
+    self.save!
+
+    return ret
   end
 
   def fetch_issues(issues=nil)

src/api/db/development_structure.sql

@@ -311,6 +311,7 @@ CREATE TABLE `issue_trackers` (
   `user` varchar(255) DEFAULT NULL,
   `password` varchar(255) DEFAULT NULL,
   `long_name` text NOT NULL,
+  `issues_updated` int(11) DEFAULT NULL,
   PRIMARY KEY (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
@@ -833,6 +834,10 @@ INSERT INTO schema_migrations (version) VALUES ('20120112194300');
 
 INSERT INTO schema_migrations (version) VALUES ('20120119194300');
 
+INSERT INTO schema_migrations (version) VALUES ('20120119204300');
+
+INSERT INTO schema_migrations (version) VALUES ('20120119204301');
+
 INSERT INTO schema_migrations (version) VALUES ('21');
 
 INSERT INTO schema_migrations (version) VALUES ('22');

src/api/db/migrate/20120119204300_add_update_timestamp.rb

@@ -0,0 +1,9 @@
+class AddUpdateTimestamp < ActiveRecord::Migration
+  def self.up
+    add_column :issue_trackers, :issues_updated, :integer
+  end
+
+  def self.down
+    remove_column :issue_trackers, :issues_updated
+  end
+end

src/api/db/migrate/20120119204301_set_current_time_as_updated.rb

@@ -0,0 +1,11 @@
+class SetCurrentTimeAsUpdated < ActiveRecord::Migration
+  def self.up
+    IssueTracker.find(:all).each do |t|
+      t.issues_updated=Time.now unless t.issues_updated
+      t.save
+    end
+  end
+
+  def self.down
+  end
+end