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Question

我使用Hibernate 5.2.12和MySQL 5.7.18。

在我的项目中有以下实体：

package my.package;

import java.time.OffsetDateTime;
import java.util.List;
import java.util.UUID;

import javax.persistence.CollectionTable;
import javax.persistence.Column;
import javax.persistence.ElementCollection;
import javax.persistence.Entity;
import javax.persistence.EntityListeners;
import javax.persistence.JoinColumn;
import javax.persistence.Table;
import javax.validation.constraints.NotEmpty;

import lombok.Getter;
import lombok.Setter;
import lombok.experimental.Accessors;
import org.hibernate.annotations.Type;
import pl.chilldev.commons.db.AbstractEntity;
import pl.chilldev.commons.db.timestampable.Timestamp;
import pl.chilldev.commons.db.timestampable.TimestampType;
import pl.chilldev.commons.db.timestampable.TimestampableListener;

/**
* Recording meta entity.
*/
@Entity
@Table(name = "Recordings")
@EntityListeners(TimestampableListener.class)
@Accessors(chain = true)
@Getter
public class Recording extends AbstractEntity
{
    /**
    * Assigned shop.
    */
    @Column(length = AbstractEntity.LENGTH_UUID, nullable = false)
    @NotEmpty
    @Setter
    private UUID idShop;

    /**
    * Track title.
    */
    @Column(length = AbstractEntity.LENGTH_STRING_COMPACT, nullable = false)
    @Setter
    private String name;

    /**
    * Track description.
    */
    @Column
    @Type(type = "text")
    @Setter
    private String content;

    /**
    * Creation date.
    */
    @Column(nullable = false, updatable = false)
    @Timestamp(TimestampType.CREATE)
    private OffsetDateTime createdAt;

    /**
    * Track price.
    */
    @Column(nullable = false)
    @Setter
    private double price;

    /**
    * Thumbnail S3 key.
    */
    @Column(length = AbstractEntity.LENGTH_URL)
    @Setter
    private String thumbnail;

    /**
    * Media file S3 key.
    */
    @Column(length = AbstractEntity.LENGTH_URL)
    @Setter
    private String media;

    /**
    * Length of recording.
    */
    @Column
    @Setter
    private Short duration;

    /**
    * Categories to which recording is assigned.
    */
    @ElementCollection
    @CollectionTable(name = "RecordingsCategories", joinColumns = @JoinColumn(name = "idRecording"))
    @Column(name = "idCategory", length = AbstractEntity.LENGTH_UUID, nullable = false)
    private List<UUID> categories;
}

（AbstractEntity仅定义UUID类型的一个id属性。）

当我保存实体时（我使用Spring Data JPA和Spring Data REST，所以我只调用端点）一切正常。

但无论出于何种原因，Hibernate都不想从数据库中加载idShop属性。当我访问加载实体的某个端点时，idShop始终为null。我试图确定它并且似乎在Hibernate中（与Spring，Spring Data等无关）。

以下是MySQL控制台的打印输出：

mysql> select *, hex(idShop) from Recordings;
+------------------+---------+---------------------+----------+------------------+-------+------+-------+-----------+----------------------------------+
| id               | content | createdAt           | duration | idShop           | media | name | price | thumbnail | hex(idShop)                      |
+------------------+---------+---------------------+----------+------------------+-------+------+-------+-----------+----------------------------------+
| �HG_OƵ�㰅aY     | NULL    | 2018-04-04 23:36:46 |     NULL | �߈'��C�����9K�           | NULL  | Test |     2 | NULL      | A6DF8827B2F043B4BBE7DADA394B11D2 |
+------------------+---------+---------------------+----------+------------------+-------+------+-------+-----------+----------------------------------+
1 row in set (0,00 sec)

在调试期间，idShop属性的值被大量加载，但结果集的某些wasNull属性求值为true并导致整个求值也变为null：

编辑1

表（由Hibernate自己创建）：

mysql> SHOW CREATE TABLE Recordings;
+------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table      | Create Table                                                                                                                                                                                                                                                                                                                                                                               |
+------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Recordings | CREATE TABLE `Recordings` (
`id` binary(16) NOT NULL,
`content` longtext,
`createdAt` datetime NOT NULL,
`duration` smallint(6) DEFAULT NULL,
`idShop` binary(16) NOT NULL,
`media` varchar(1024) DEFAULT NULL,
`name` varchar(128) NOT NULL,
`price` double NOT NULL,
`thumbnail` varchar(1024) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 |
+------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0,00 sec)

Hibernate没有加载UUID值

编辑1

0 个答案: