Querydsl parameter binding problem with @Convert Field

[tj3828]

Observed vs. expected behavior

When the field to which @convert is applied is used as a search condition,
if true is returned to the casebuilder statement in select, the @convert is not applied to the parameter in the where statement.

Observed : select case when runsubject0_.Contents_Grade_Cd='' then 1 else 1 end as col_0_0_ from TBL_RUN_SUBJECT runsubject0_ where runsubject0_.Pass_Confirmed_Yn=1

expected behavior : select case when runsubject0_.Contents_Grade_Cd='' then 1 else 1 end as col_0_0_ from TBL_RUN_SUBJECT runsubject0_ where runsubject0_.Pass_Confirmed_Yn='Y'

Steps to reproduce

• entity field

@Convert(converter = BooleanToYNConverter.class)
@Column(name="Pass_Confirmed_Yn")
private boolean passConfirmedYn;	

• converter

public class BooleanToYNConverter implements AttributeConverter<Boolean, String> {
	
	@Override
	public String convertToDatabaseColumn(Boolean attribute) {
		return (attribute != null && attribute) ? "Y" : "N";
	}
	
	@Override
	public Boolean convertToEntityAttribute(String s) {
	    return "Y".equals(s);
    }
}

• Observed sample query

JPAQuery<GovernmentSupportFundEnrollDTO> query = new JPAQuery<>(em);
            query
                .select(
                        Projections.fields(GovernmentSupportFundEnrollDTO.class,
                        new CaseBuilder()
                            .when(runSubject.contentsGradeCd.eq(""))
                                .then(true)
                            .otherwise(false)
                            .as("refundYn"))
                    )
                .from(runSubject)
                .where(runSubject.passConfirmedYn.eq(true))
                .fetch();

result : select case when runsubject0_.Contents_Grade_Cd='' then 1 else 1 end as col_0_0_ from TBL_RUN_SUBJECT runsubject0_ where runsubject0_.Pass_Confirmed_Yn=1

If the sample query does not return true to the case builder, @convert is normally applied.

• expected behavior sample query

JPAQuery<GovernmentSupportFundEnrollDTO> query = new JPAQuery<>(em);
            query
                .select(
                        Projections.fields(GovernmentSupportFundEnrollDTO.class,
                        new CaseBuilder()
                            .when(runSubject.contentsGradeCd.eq(""))
                                .then(false)
                            .otherwise(false)
                            .as("refundYn"))
                    )
                .from(runSubject)
                .where(runSubject.passConfirmedYn.eq(true))
                .fetch();

result : select case when runsubject0_.Contents_Grade_Cd='' then 1 else 1 end as col_0_0_ from TBL_RUN_SUBJECT runsubject0_ where runsubject0_.Pass_Confirmed_Yn='Y'

Environment

Querydsl version: 4.2.1

Querydsl module: com.querydsl:querydsl-core:4.2.1

Database: mariadb

JDK: 1.8

[jwgmeligmeyling]

See #2652