我正在尝试使用Eclipselink 2.5.2和MySQL来创建一个简单的多租户示例。
当尝试将实体持久化为租户ID时,mysql服务器会抛出错误:“表'jpatest.tenant1_userdata'不存在”。 (userdata是实体,jpatest数据库名称,tenant1是tenant-id)
表确实不存在,数据库jpatest确实存在。每次我尝试使用新的租户ID时,我都希望eclipselink自动生成表格。
所以问题是: 我如何强制Eclipselink创建表格? 如果那是不可能的;如何在运行时创建表?
以下是代码:
实体:
@Entity
@Table(name = "userdata")
@Multitenant(value = MultitenantType.TABLE_PER_TENANT)
@TenantTableDiscriminator(type = TenantTableDiscriminatorType.PREFIX, contextProperty = "tenant-id")
public class UserData implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
private static final long serialVersionUID = 1L;
private String name;
.
.
.
的persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="MultiTeanantTest" transaction-type="RESOURCE_LOCAL">
<class>UserData</class>
<properties>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/jpatest" />
<property name="javax.persistence.jdbc.user" value="root" />
<property name="javax.persistence.jdbc.password" value="" />
<property name="javax.persistence.schema-generation.database.action" value="drop-and-create"/>
<property name="javax.persistence.schema-generation.create-database-schemas" value="true"/>
<property name="eclipselink.ddl-generation" value="create-tables"/>
</properties>
</persistence-unit>
</persistence>
主要课程:
public class Main {
public static void main(String[] args) {
UserData ud = new UserData();
ud.setNombre("John);
Map properties = new HashMap<>();
properties.put("tenant-id", "tenant1");
EntityManagerFactory emf = Persistence.createEntityManagerFactory("MultiTeanantTest", properties );
EntityManager em = emf.createEntityManager();
em.getTransaction().begin();
em.persist(ud);
em.getTransaction().commit();
}
}
希望有人可以给我一个关于我做错的提示。
答案 0 :(得分:0)
Eclipselink在多租户情景中不支持DDL生成。
有关详细信息,请参阅此链接https://wiki.eclipse.org/EclipseLink/DesignDocs/Multi-Tenancy/TablePerTenant