Audit - delete duplicate audit requests and add unique key

Summary: Fixes T1768. This is mostly a data cleanliness issue as duplicate rows don't really do anything, but let's clear it up now.

Test Plan: made some duplicate rows by adding the same auditor multiple times. ran ./bin/storage upgrade and it worked perfectly!

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T1768

Differential Revision: https://secure.phabricator.com/D10849

Author: bobtrahan

resources/sql/autopatches/20141113.auditdupes.php

@@ -0,0 +1,22 @@
+<?php
+
+$table = new PhabricatorRepositoryAuditRequest();
+$conn_w = $table->establishConnection('w');
+
+echo "Removing duplicate Audit requests...\n";
+$seen_audit_map = array();
+foreach (new LiskMigrationIterator($table) as $request) {
+  $commit_phid = $request->getCommitPHID();
+  $auditor_phid = $request->getAuditorPHID();
+  if (isset($seen_audit_map[$commit_phid][$auditor_phid])) {
+    $request->delete();
+  }
+
+  if (!isset($seen_audit_map[$commit_phid])) {
+    $seen_audit_map[$commit_phid] = array();
+  }
+
+  $seen_audit_map[$commit_phid][$auditor_phid] = 1;
+}
+
+echo "Done.\n";

src/applications/repository/storage/PhabricatorRepositoryAuditRequest.php

@@ -27,6 +27,10 @@ public function getConfiguration() {
         'auditorPHID' => array(
           'columns' => array('auditorPHID', 'auditStatus'),
         ),
+        'key_unique' => array(
+          'columns' => array('commitPHID', 'auditorPHID'),
+          'unique' => true,
+        ),
       ),
     ) + parent::getConfiguration();
   }