testing

20131004.dxreviewers.php
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			<?php

			$table = new DifferentialRevision();
			$conn_w = $table->establishConnection('w');

			// NOTE: We migrate by revision because the relationship table doesn't have
			// an "id" column.

			foreach (new LiskMigrationIterator($table) as $revision) {
			$revision_id = $revision->getID();
			$revision_phid = $revision->getPHID();

			echo pht('Migrating reviewers for %s...', "D{$revision_id}")."\n";

			$reviewer_phids = queryfx_all(
			$conn_w,
			'SELECT objectPHID FROM %T WHERE revisionID = %d
			AND relation = %s ORDER BY sequence',
			'differential_relationship',
			$revision_id,
			'revw');
			$reviewer_phids = ipull($reviewer_phids, 'objectPHID');

			if (!$reviewer_phids) {
			continue;
			}

			$editor = new PhabricatorEdgeEditor();
			foreach ($reviewer_phids as $dst) {
			if (phid_get_type($dst) == PhabricatorPHIDConstants::PHID_TYPE_UNKNOWN) {
			// At least one old install ran into some issues here. Skip the row if we
			// can't figure out what the destination PHID is. See here:
			// https://github.com/phacility/phabricator/pull/507
			continue;
			}

			$editor->addEdge(
			$revision_phid,
			DifferentialRevisionHasReviewerEdgeType::EDGECONST,
			$dst,
			array(
			'data' => array(
			'status' => DifferentialReviewerStatus::STATUS_ADDED,
			),
			));
			}

			$editor->save();
			}

			echo pht('Done.')."\n";