Craft\m160715_000000_workflow_addRejectedStatus::safeUp PHP Method

    public function safeUp()
    {
        // Set fields to be Enum before things get too complicated!
        craft()->db->createCommand()->alterColumn('workflow_submissions', 'status', array('values' => array(Workflow_SubmissionModel::APPROVED, Workflow_SubmissionModel::PENDING, Workflow_SubmissionModel::REJECTED, Workflow_SubmissionModel::REVOKED), 'column' => 'enum'));
        craft()->db->createCommand()->addColumnAfter('workflow_submissions', 'dateRevoked', ColumnType::DateTime, 'dateApproved');
        craft()->db->createCommand()->addColumnAfter('workflow_submissions', 'dateRejected', ColumnType::DateTime, 'dateApproved');
        craft()->db->createCommand()->addColumnAfter('workflow_submissions', 'notes', ColumnType::Text, 'status');
        return true;
    }