How to cancel Hibernate Hbm2ddl.auto automatically create foreign keys

When you use HBM2DDL to automatically create a database table, you create a foreign key association for the table at the same time. The configuration is as follows.

<prop key= "Hibernate.hbm2ddl.auto" >create</prop>

To cancel the automatic creation of foreign keys, you need to configure foreign-key= "None".

The update log for Hibernate has the following description:

Changes in version 2.1.9 (xx.x.xxxx)------------------------------------* foreign-key= "None" can is used to disable Gener Ation of a foreign key.

As a result, the configuration of Hibernate ORM in the project can be annotated or used as a configuration file.

The configuration file can be configured as follows in the XML corresponding entity class (note the foreign-key= "None"):

<class name= "Org.jbpm.identity.User"  table= "Jbpm_id_user"  discriminator-value= "U" >     <id name= "id"  column= "id_" >      <generator  class= "native"  />    </id>    <discriminator  type= "char"  column= "Class_"  />    <property name= "name"   Column= "name_"  />    <property name= "email"  column= "EMAIL_"  / >    <property name= "Password"  column= "Password_"  />     <set name= "Memberships"  cascade= "All" >      <key  column= "User_"  />      <one-to-many class= " Org.jbpm.identity.Membership " />    </set>    <set  name= "Permissions"  cascade= "all " table=" Jbpm_id_permissions ">      <key column=" ENTITY_ "  foreign-key= "None"  />      <element type= " Org.jbpm.identity.hibernate.PermissionUserType ">        <column  name= "Class_"  />        <column name= "NAME_"  />        <column name= "ACTION_"  />       </element>    </set>  </class>

Annotations can be used to configure annotations before the Get method of the corresponding class field as follows:

@JoinColumn (name= "parent_id") @ForeignKey (name = "None")

Above.

How to cancel Hibernate Hbm2ddl.auto automatically create foreign keys