queryDSL any().concat

Question

请帮忙，

如何从 oneToMany 关系中连接属性？

order.users.any().firstName
    .concat(order.users.any().lastName)
    .containsIgnoreCase(request.fullName)

这给出了奇怪的异常：

org.postgresql.util.PSQLException: ERROR: missing FROM-clause entry for table "user4_"

Answer 1

在进行双向映射和使用 JPASubQuery 时可以正常工作。

BooleanBuilder builder = new BooleanBuilder();
...
JPASubQuery from = new JPASubQuery()
                    .from(QOrderUnit.orderUnit)
                    .where(QOrderUnit.orderUnit.orderBatch.eq(orderBatch).
                            and(QOrderUnit.orderUnit.firstName.concat(" ").concat(QOrderUnit.orderUnit.lastName)
                                    .containsIgnoreCase(orderRequest.getOwners())));
builder.and(from.exists());