Spring 数据 jpa 使用规范的“IN”子句

Question

我正在尝试使用 spring 数据 jpa Speicification API 从数据库中获取记录。在这里我需要为状态列的“In”子句添加条件，因为我的代码如下所示。

public static Specification<UserEntity> userSpecificationsforOperator(String orgName, String groupID,
            List<String> status, Date startDate, Date endDate) {
        return (root, query, builder) -> {
            List<Predicate> predicates = new ArrayList<>();

            if (orgName != null) {
                Join<UserEntity, OrganizationEntity> organization = root.join("organization");
                predicates.add(builder.equal(organization.get("name"), orgName));
            }
            /*
             * if (groupID != null) {
             * predicates.add(builder.equal(root.get("refApprovalGroupId"), groupID)); }
             */

            if (status != null && status.size()>0) {
                predicates.add(root.get("status").in(status));
            }

            if (startDate != null) {
                predicates.add(builder.greaterThanOrEqualTo(root.get("createdDate"), startDate.toInstant()));
            }
            if (endDate != null) {
                predicates.add(builder.lessThanOrEqualTo(root.get("createdDate"), endDate.toInstant()));
            }
            Predicate[] p = predicates.toArray(new Predicate[predicates.size()]);
            return p.length == 0 ? null : p.length == 1 ? p[0] : builder.and(p);
        };
    }

上面的代码在 cosole 中生成查询，如下所示

SELECT userentity0_.id                    AS id1_68_,
       userentity0_.created_by            AS created_2_68_,
       userentity0_.created_date          AS created_3_68_,
       userentity0_.last_modified_by      AS last_mod4_68_,
       userentity0_.last_modified_date    AS last_mod5_68_,
       userentity0_.group_id              AS group_id6_68_,
       userentity0_.group_name            AS group_na7_68_,
       userentity0_.is_enrollment_updated AS is_enrol8_68_,
       userentity0_.is_federated          AS is_feder9_68_,
       userentity0_.name                  AS name10_68_,
       userentity0_.organization_id       AS organiz17_68_,
       userentity0_.ref_approval_group_id AS ref_app11_68_,
       userentity0_.reference_name        AS referen12_68_,
       userentity0_.status                AS status13_68_,
       userentity0_.uims_id               AS uims_id14_68_,
       userentity0_.user_status           AS user_st15_68_,
       userentity0_.version               AS version16_68_
FROM   user userentity0_
       INNER JOIN organization organizati1_
               ON userentity0_.organization_id = organizati1_.id
WHERE  organizati1_.name ='utopia'
       AND ( userentity0_.status =(?,?) 

当我将查询带入数据库工具并传递值时，我正在获取数据。 但是从应用程序运行时我没有获取数据。 在这里，我了解到我能够正确生成查询，但我的值没有正确传递。 那么你能否建议我如何让我的代码返回数据。

Answer 1

也许它的实施会导致问题......

在这里，使用它，让我知道它是否有效

if (status != null && status.size()>0) {
    predicates.add(builder.in(root.get("status")).value(status));
}