JPA map non-id field as foreign key

I have two entities as follows:

@Entity  
public class Entity1  
{
  @Id  
  Long id;  
  @Basic  
  @OneToOne  
  @Column(unique=true,nullable=false)  
  String awesome;  
...    
}  



and

@Entity  
public class Entity2  
{  
  @Id  
  Long id;  
  @OneToOne(mappedBy="awesome",targetEntity=Entity1.class)    
  @Column(name="myAwesome", insertable=false,updateable=false)   
  @Basic   
  String awesome;  //FK to Entity1  
}    

I am expecting SQL to be generated that looks like this:

Alter Table Entity1 Add Constraint Entity1Entity2_Awesome Foreign Key (myAwesome) References Entity1.Awesome

Cur开发者_运维技巧rently no SQL is being generated, I am using eclipselink.

A String cannot be a OneToOne, and you can't mark something as a Basic and a OneToOne.

To create a OneToOne relationship use,

@OneToOne Entity2 entity2;

All relationships should be by Id, not by a non-id field such as awesome. It is possible to define a foreign key on a non-Id field in EclipseLink, but not in JPA, you would need to use a DescriptorCustomizer for this.

In general relationships should be by Id, so either reconsider the relationship of the Id.

I think you should use @JoinColumn here and explicitly specify names of column for join.