使用 JPA 和 Hibernate 6 在 Spanner 中保存 Json 数据

Question

我正在分析 Spanner 对我们现有应用程序迁移的兼容性。我在尝试使用 JPA 和 hibernate 6 将 json 数据插入到 spanner 的列中时遇到错误。 我已经提到了 Spanner JPA 的示例应用程序 以及诸如 cloud Spanner 集成 等多个帖子。但无法继续执行这些建议。需要建议来解决同样的问题。以下是错误和应用程序的详细信息

错误： 值的类型为 STRING，无法插入到列 json_data，该列的类型为 JSON

实体类：

import com.google.cloud.spanner.hibernate.PooledBitReversedSequenceStyleGenerator;
import jakarta.persistence.*;
import lombok.AllArgsConstructor;
import lombok.NoArgsConstructor;
import org.hibernate.annotations.GenericGenerator;
import org.hibernate.annotations.JdbcTypeCode;
import org.hibernate.id.enhanced.SequenceStyleGenerator;
import org.hibernate.type.SqlTypes;

import java.sql.SQLType;
import java.util.Map;

@AllArgsConstructor
@NoArgsConstructor
@Entity
@Table(name = "demo")
public class Demo {

    @Id
    @Column(name = "id")
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequence_generator")
    @GenericGenerator(
            name = "sequence_generator",
            strategy = "com.google.cloud.spanner.hibernate.PooledBitReversedSequenceStyleGenerator",
            parameters = {
                    @org.hibernate.annotations.Parameter(name = SequenceStyleGenerator.SEQUENCE_PARAM, value = "demo_sequence"),
                    @org.hibernate.annotations.Parameter(name = SequenceStyleGenerator.INCREMENT_PARAM, value = "200"),
                    @org.hibernate.annotations.Parameter(name = SequenceStyleGenerator.INITIAL_PARAM, value = "50000"),
                    @org.hibernate.annotations.Parameter(name = PooledBitReversedSequenceStyleGenerator.EXCLUDE_RANGE_PARAM, value = "[1,1000]"),
            })
    private Long id;

    @JdbcTypeCode(SqlTypes.JSON)
    private Map<String, Object> jsonData;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Map<String, Object> getJsonData() {
        return jsonData;
    }

    public void setJsonData(Map<String, Object> jsonData) {
        this.jsonData = jsonData;
    }
}

DDL 和 DML：

drop table IF EXISTS demo;
drop sequence IF EXISTS demo_sequence;
CREATE SEQUENCE demo_sequence OPTIONS (
  sequence_kind="bit_reversed_positive"
);
create table demo(

    id INT64 NOT NULL default (GET_NEXT_SEQUENCE_VALUE(SEQUENCE demo_sequence)),
    json_data JSON,

)priMARY key(id);

insert into demo(json_data) values (JSON '{"name":"tom","age":30}');

POM.xml

<properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.google.cloud</groupId>
            <artifactId>google-cloud-spanner-hibernate-dialect</artifactId>
            <version>3.3.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.cloud</groupId>
            <artifactId>google-cloud-spanner</artifactId>
            <version>6.80.1</version>
        </dependency>
        <dependency>
            <groupId>com.google.cloud</groupId>
            <artifactId>spring-cloud-gcp-data-spanner</artifactId>
            <version>5.8.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
            <version>3.3.5</version>
        </dependency>
        <dependency>
        <groupId>com.google.cloud</groupId>
        <artifactId>google-cloud-spanner-jdbc</artifactId>
        <version>2.24.1</version>
    </dependency>
    <dependency>
        <groupId>com.vladmihalcea</groupId>
        <artifactId>hibernate-types-60</artifactId>
        <version>2.21.1</version>
    </dependency>

    </dependencies>

Answer 1

将 hibernate 方言依赖项从 3.3.0 升级到 3.7.1 解决了我的 json 解析问题。发生此故障是因为 hibernate 将 json 视为字符串。

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