Spring Data Jpa-复合主键问题

Question

我用过play-spring-data-jpa模板开始一个项目，

我一直在尝试使休眠映射到使用复合主键的联接表时遇到问题。

我要连接的数据库是现有的mysql数据库。

请看下面：

SQL：

 CREATE TABLE IF NOT EXISTS `text_advertising`.`campaign_item_slots` ( `campaign_item_id` BIGINT NOT NULL, `advert_slot_id` BIGINT NOT NULL, `active` TINYINT(1) NOT NULL DEFAULT TRUE, `date_created` DATETIME NOT NULL, `date_updated` DATETIME NOT NULL, PRIMARY KEY (`campaign_item_id`, `advert_slot_id`), INDEX `fk_campaign_item_slots_2_idx` (`advert_slot_id` ASC), CONSTRAINT `fk_campaign_item_slots_1` FOREIGN KEY (`campaign_item_id`) REFERENCES `text_advertising`.`campaign_items` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION, CONSTRAINT `fk_campaign_item_slots_2` FOREIGN KEY (`advert_slot_id`) REFERENCES `text_advertising`.`advert_slots` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION) ENGINE = InnoDB DEFAULT CHARACTER SET = utf8 COLLATE = utf8_general_ci; 

CampaignItemSlot类：

 @Entity @Table(name = "campaign_item_slots") public class CampaignItemSlot implements Serializable{ @EmbeddedId CampaignItemSlotId campaignItemSlotId; private boolean active; private Timestamp date_created; private Timestamp date_updated; } 

CampaignItemSlotId类别

 @Embeddable public class CampaignItemSlotId implements Serializable{ @Column(name="advert_slot_id") public long advertSlot; @Column(name="campaign_item_id") public long campaignItem; } 

当我设置“ hibernate.hbm2ddl.auto”，“ validate”时，出现以下错误：

 Caused by: org.hibernate.HibernateException: Missing column: id in text_advertising.campaign_item_slots 

当我设置“ hibernate.hbm2ddl.auto”，“ update”时，将在campaign_item_slots表中自动创建一个ID字段，如执行show create表所示。 这不是我想要的：

 | campaign_item_slots | CREATE TABLE `campaign_item_slots` ( `campaign_item_id` bigint(20) NOT NULL, `advert_slot_id` bigint(20) NOT NULL, `active` tinyint(1) NOT NULL DEFAULT '1', `date_created` datetime NOT NULL, `date_updated` datetime NOT NULL, `id` bigint(20) NOT NULL, `advertSlot_id` bigint(20) DEFAULT NULL, `campaignItem_id` bigint(20) DEFAULT NULL, PRIMARY KEY (`campaign_item_id`,`advert_slot_id`), KEY `fk_campaign_item_slots_2_idx` (`advert_slot_id`), KEY `FK_q87o53119u79073jwttacsqta` (`advertSlot_id`), KEY `FK_es60h5vj30rllkf0js1qy642y` (`campaignItem_id`), CONSTRAINT `FK_es60h5vj30rllkf0js1qy642y` FOREIGN KEY (`campaignItem_id`) REFERENCES `campaign_items` (`id`), CONSTRAINT `fk_campaign_item_slots_1` FOREIGN KEY (`campaign_item_id`) REFERENCES `campaign_items` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION, CONSTRAINT `fk_campaign_item_slots_2` FOREIGN KEY (`advert_slot_id`) REFERENCES `advert_slots` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION, CONSTRAINT `FK_q87o53119u79073jwttacsqta` FOREIGN KEY (`advertSlot_id`) REFERENCES `advert_slots` (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 | 

这是我的build.sbt：

 version := "1.0-SNAPSHOT" libraryDependencies ++= Seq( javaCore, javaJpa, javaWs % "test", "org.springframework" % "spring-context" % "4.1.4.RELEASE", "org.springframework.data" % "spring-data-jpa" % "1.8.0.RELEASE", "org.springframework" % "spring-orm" % "4.1.4.RELEASE", "org.springframework" % "spring-jdbc" % "4.1.4.RELEASE", "org.springframework" % "spring-tx" % "4.1.4.RELEASE", "org.springframework" % "spring-expression" % "4.1.4.RELEASE", "org.springframework" % "spring-aop" % "4.1.4.RELEASE", "org.springframework" % "spring-test" % "4.1.4.RELEASE" % "test", javaJpa.exclude("org.hibernate.javax.persistence", "hibernate-jpa-2.0-api"), "org.hibernate" % "hibernate-entitymanager" % "4.3.8.Final", "javax.inject" % "javax.inject" % "1", "mysql" % "mysql-connector-java" % "5.1.34", "org.json" % "json" % "20090211" ) lazy val root = (project in file(".")).enablePlugins(PlayJava) 

我尝试过使用IdClass和EmbeddedId等的许多不同组合，如本网站所述： 映射变体

因此，无论我尝试哪种组合，经过一番摆弄之后，我都会遇到以下相同的错误：

 Caused by: org.hibernate.HibernateException: Missing column: id in text_advertising.campaign_item_slots 

我开始怀疑这是否是春季数据问题。

非常感谢您的帮助。 谢谢。

Answer 1

似乎下面的配置为我做了：

CampaignItemSlot.java

 package models; import java.io.Serializable; import java.sql.Timestamp; import javax.persistence.EmbeddedId; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.JoinColumns; import javax.persistence.ManyToOne; import javax.persistence.MapsId; import javax.persistence.Table; @Entity @Table(name = "campaign_item_slots") public class CampaignItemSlot implements Serializable{ @EmbeddedId private CampaignItemSlotPk campaignItemSlotPk; @MapsId("advert_slot_id") @JoinColumns({ @JoinColumn(name="advert_slot_id", referencedColumnName="id"), }) @ManyToOne AdvertSlot advertSlot; @MapsId("campaign_item_id") @JoinColumns({ @JoinColumn(name="campaign_item_id", referencedColumnName="id"), }) @ManyToOne CampaignItem campaignItem; private boolean active; private Timestamp date_created; private Timestamp date_updated; public CampaignItemSlot() { super(); // TODO Auto-generated constructor stub } public CampaignItemSlotPk getCampaignItemSlotPk() { return campaignItemSlotPk; } public void setCampaignItemSlotPk(CampaignItemSlotPk campaignItemSlotPk) { this.campaignItemSlotPk = campaignItemSlotPk; } public boolean isActive() { return active; } public void setActive(boolean active) { this.active = active; } public Timestamp getDate_created() { return date_created; } public void setDate_created(Timestamp date_created) { this.date_created = date_created; } public Timestamp getDate_updated() { return date_updated; } public void setDate_updated(Timestamp date_updated) { this.date_updated = date_updated; } public AdvertSlot getAdvertSlot() { return advertSlot; } public void setAdvertSlot(AdvertSlot advertSlot) { this.advertSlot = advertSlot; } public CampaignItem getCampaignItem() { return campaignItem; } public void setCampaignItem(CampaignItem campaignItem) { this.campaignItem = campaignItem; } } 

CampaignItemSlotPK.java

 package models; import java.io.Serializable; import java.sql.Timestamp; import javax.persistence.Column; import javax.persistence.Embeddable; import javax.persistence.Entity; import javax.persistence.JoinColumn; import javax.persistence.ManyToOne; import javax.persistence.Table; @Embeddable public class CampaignItemSlotPk implements Serializable{ @Column(name="campaign_item_id") private long campaignItem; @Column(name="advert_slot_id") private long advertSlot; public CampaignItemSlotPk() { // TODO Auto-generated constructor stub } public long getCampaignItem() { return campaignItem; } public void setCampaignItem(long campaignItem) { this.campaignItem = campaignItem; } public long getAdvertSlot() { return advertSlot; } public void setAdvertSlot(long advertSlot) { this.advertSlot = advertSlot; } } 

build.sbt

  javaJpa.exclude("org.hibernate.javax.persistence", "hibernate-jpa-2.0-api"), "org.hibernate" % "hibernate-entitymanager" % "4.3.0.Final", "mysql" % "mysql-connector-java" % "5.1.34", 

这样就解决了。