인프런 커뮤니티 질문&답변

@Test
    public void dynamicQueryWhereParam() {
        String usernameParam = null;
        Integer ageParam = 10;

        List<Member> result = queryFactory
                .selectFrom(member)
//                .where(usernameEq(usernameParam), ageEq(ageParam))
                .where(allEq(usernameParam, ageParam))
                .fetch();

        assertThat(result.size()).isEqualTo(1);
    }

    private BooleanExpression usernameEq(String usernameParam) {
        if (usernameParam == null) {
            return Expressions.TRUE;
        }
        return member.username.eq(usernameParam);
    }

    private BooleanExpression ageEq(Integer ageParam) {
        if (ageParam == null) {
            return Expressions.TRUE;
        }
        return member.age.eq(ageParam);
    }

    private BooleanExpression allEq(String usernameParam, Integer ageParam) {
        return usernameEq(usernameParam).and(ageEq(ageParam));
    }

select m.* from member m where true and m.age = 10;

위와 같이 Expressions.TRUE를 반환하게 만들면 쿼리에 true가 포함돼서 실무에서 사용하기에는 좀 그럴까요?