java - JPA OneToOne relationship -

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i building project using play framework , having trouble getting head around jpa @onetoone relationships.

i have 2 classes:


user object

@entity @table( name="users" ) public class users extends model {      @onetoone( mappedby="userid", fetch=fetchtype.lazy, cascade = cascadetype.all )     @foreignkey( name="userid", inversename="userid" )     usersettings usersettings;     public userid;     public username; }


usersettings

@entity @table( name="user_settings" ) public class usersettings extends model {      @onetoone( cascade = cascadetype.all,targetentity=user.class )     public string userid;     public string xml;      public usersettings( string userid ){         this.userid = userid;     } }


the idea trying set userid field within user foreign key within usersettings. have tried few different ways achieve , code throws error. common error recveive is: referenced property not (one|many)toone.

however, when try set userid in usersettings using code above, receive following exception:

a javax.persistence.persistenceexception has been caught, org.hibernate.propertyaccessexception: not field value reflection getter of reader.user.id

can explain how can achieve desired goal?

read section 5.2 of hibernate reference difference between entities , values. you're trying map string entity. entities can (one|many)toone, error telling you. i.e., instead of string userid, should using user user, , instead of mappedby="userid", mappedby="user".


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