Spring Data JPA JSONB参数化

Posted 2021-04-13

将此查询转换为Spring Data Repository nativeQuery的正确语法（JPA，Spring Data或SpEL）是什么？

SELECT *
FROM   mytable 
WHERE  f_jsonb_arr_lower(myjsonb -> 'myArray', 'subItem', 'email') 
 @> '"[e-mail]"';

我想使用输入参数而不是硬编码"[e-mail]"。

我的模型：Postgres myTable，带有JSONB列myJsonb：

{
  "myArray": [
    {
      "subItem": {
        "email": "[e-mail]"
      }
    },
    {
      "subItem": {
        "email": "[e-mail]"
      }
    }
  ]
}

索引描述了here。

硬编码版本有效：

@Query(value = 
        "SELECT m.* " +
        " FROM mytable AS m " +
        " WHERE f_jsonb_arr_lower(myjsonb -> 'myArray' ,'subItem', 'email') " + 
        "   @> '"[e-mail]"' " +
        " ORDER BY ?#{#pageable} ", 
        // Spring Data nativeQueries with Pageable require a separate countQuery:
        countQuery = 
        "SELECT count(m.id) " +
        " FROM mytable AS m " +
        " WHERE f_jsonb_arr_lower(myjsonb -> 'myArray' ,'subItem', 'email') " +
        " @> '"[e-mail]"' ",
        nativeQuery = true)
Page<MyTableEntity> findAllHardcodedPageable(Pageable pageable);

但是尝试在Spring Data存储库中利用lowercaseEmailAddress参数nativeQuery不起作用：

@Query(value = 
        "SELECT m.* " +
        " FROM mytable AS m " +
        " WHERE f_jsonb_arr_lower(myjsonb -> 'myArray' ,'subItem', 'email') " + 
        "   @> '"?{lowercaseEmailAddress}"' " +
        " ORDER BY ?#{#pageable} ", 
        countQuery = 
        "SELECT count(m.id) " +
        " FROM mytable AS m " +
        " WHERE f_jsonb_arr_lower(myjsonb -> 'myArray' ,'subItem', 'email') " +
        " @> '"?{lowercaseEmailAddress}"' ",
        nativeQuery = true)
Page<MyTableEntity> findAllByEmailPageable
  (String lowercaseEmailAddress, Pageable pageable);

在我的Postgres查询日志记录中，我可以看到从未设置lowercaseEmailAddress参数：

LOG:  execute S_2: COMMIT
LOG:  execute S_3: BEGIN
LOG:  execute <unnamed>: SELECT count(m.id)  FROM mytable 
   AS m  WHERE f_jsonb_arr_lower(myjsonb -> 'myArray', 
   'subitem', 'email')  @> '"?1"' 
LOG:  execute S_11: ROLLBACK

答案

找到答案：

1）只将双引号的String传递给spring数据存储库方法：

String emailAddressWithDoubleQuotes = String.format(""%s"",emailAddress);
result = repository.findAllByEmailPageable(emailAddressWithDoubleQuotes, pageRequest).getContent();

2）Spring Repository @Query需要在括号中包含SpEL表达式并将其转换为jsonb：

static final String FIND_ALL_BY_EMAIL_QUERY = " FROM mytable AS m " +
        " WHERE f_jsonb_arr_lower(metadata -> 'myArray', 'subItem', 'email') " +
        " @> ( ?#{#lowercaseEmailAddress} )\:\:jsonb";
@Query( // only use 'ORDER BY #pageableWithNativeSort' on 'value' query:
        value = "SELECT m.* " + FIND_ALL_BY_EMAIL_QUERY + " ORDER BY ?#{#pageableWithNativeSort} ",
        // Spring Data nativeQueries with Pageable require a separate 'countQuery':
        countQuery = "SELECT count(m.id) " + FIND_ALL_BY_EMAIL_QUERY,
        nativeQuery = true)
Page<OrderEntity> findAllBysubItemEmail(
        @Param("lowercaseEmailAddress") String lowercaseEmailAddress,
        @Param("pageableWithNativeSort") Pageable pageableWithNativeSort);