Spring Data JPA JSONB 参数化答案

【问题标题】：Spring Data JPA JSONB ParamaterizationSpring Data JPA JSONB 参数化
【发布时间】：2018-06-01 08:02:53
【问题描述】：

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

SELECT *
FROM   mytable 
WHERE  f_jsonb_arr_lower(myjsonb -> 'myArray', 'subItem', 'email') 
 @> '"foo@foo.com"';

我想使用输入参数而不是硬编码"foo@foo.com"。

我的模型：Postgres myTable 带有 JSONB 列 myJsonb：

{
  "myArray": [
    {
      "subItem": {
        "email": "bar@bar.com"
      }
    },
    {
      "subItem": {
        "email": "foo@foo.com"
      }
    }
  ]
}

索引描述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') " + 
        "   @> '\"foo@foo.com\"' " +
        " 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') " +
        " @> '\"foo@foo.com\"' ",
        nativeQuery = true)
Page<MyTableEntity> findAllHardcodedPageable(Pageable pageable);

但尝试在 Spring Data 存储库 nativeQuery 中利用 lowercaseEmailAddress 参数不起作用：

@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 查询日志中，我可以看到从未设置过 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

【问题讨论】：

标签： postgresql spring-data spring-data-jpa jsonb spring-el

【解决方案1】：

找到答案：

1) 只将双引号 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 表达式并强制转换为 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);

【讨论】：