无法使用 JPA 查询检索结果

Question

I am trying to build a Spring Boot REST API that fetches data from a MySQL db.This is the JPA query method I have defined in my Repository code of my Spring Boot REST API application:

public interface WeekRepository extends CrudRepository<Week, UUID> {
           Iterable<Week> findByOriginId(UUID originId);
}

This is the details of the table that I want to query:

CREATE TABLE `week` 
  ( 
     `id`        DOUBLE NOT NULL auto_increment, 
     `due_date`  TIMESTAMP NOT NULL, 
     `origin_id` BINARY(36) DEFAULT NULL, 
     `status`    VARCHAR(36) DEFAULT NULL, 
     PRIMARY KEY (`id`) 
  )  

I have turned on logging in my Spring Boot application as a result I can see the query generated by Hibernate looks like this:

SELECT week0_.id        AS id1_3_, 
       week0_.due_date  AS due_date2_3_, 
       week0_.origin_id AS origin_i3_3_, 
       week0_.status    AS status4_3_ 
FROM   week week0_ 
WHERE  week0_.origin_id = ?; 

From the logs I can see that I am passing my parameter, origin_id in the JSON successfully through the controller to the repository code. The log print out in the console reveals that the parameter is being bound to the? parameter as shown below:

2021-01-15 00:44:05.916 TRACE 44612 --- [nio-8082-exec-2] o.h.type.descriptor.sql.BasicBinder      : binding parameter [1] as [VARCHAR] - [49ee49da-8e6e-45f0-a0ea-e63205077870]

However there is no result being returned by this query.

Can someone help me? Please do let me know if you need more information from my side. Thank you.

Answer 1

Please add below annotation to originId property to make hibernate to add necessary conversions. There seems to be some issue with UUID props for mysql

@Column(name = "origin_id")
@Type(type="uuid-char")
private UUID originId;

Answer 2

You can also use @Query annotation in your weekRepository interface to get the desired result like this:

@Query(value="select * from week0 where week0_.origin_id = ?1",nativeQuery=true )
Iterable<Week> findByOriginId(UUID originId);

Here I assumed that week0 is the database table name, so check it and change accordingly and let me know if this works.

Answer 3

Try out this:

@Query(value="select * from week where origin_id = :originId", nativeQuery=true)
Iterable<Week> findByOriginId(UUID originId);