public override void Down()
{
DropIndex("DiffLines", new[] { "HunkId" });
DropIndex("DiffHunks", new[] { "ChangeId" });
DropIndex("FileChanges", new[] { "ReviewId" });
DropIndex("Reviews", new[] { "UserId" });
DropForeignKey("DiffLines", "HunkId", "DiffHunks");
DropForeignKey("DiffHunks", "ChangeId", "FileChanges");
DropForeignKey("FileChanges", "ReviewId", "Reviews");
DropForeignKey("Reviews", "UserId", "Users");
DropTable("DiffLines");
DropTable("DiffHunks");
DropTable("FileChanges");
DropTable("Reviews");
}