I have a spring-hibernate application which is failing
to map an object properly: basically I have 2 domain objects, a Post and a User. The semantics are that every Post has 1 corresponding User.
The Post domain object looks roughly as follows:
class Post {
private int pId;
private String attribute;
...
private User user;
//getters and setters here
}
As you can see, Post contains a reference
to User. When I
load a Post object, I want
to corresponding User object
to be loaded (lazily - only when its needed).
My mapping looks as follows:
<class name="com...Post" table="post">
<id name="pId" column="PostId" />
<property name="attribute" column="Attribute" type="java.lang.String" />
<one-to-one name="User" fetch="join"
class="com...User"></one-to-one>
</class>
And of course I have a basic mapping for User set up.
As far as my table schema is concerned, I have a table called post with a foreign UserId which links
to the user table.
I thought this setup should work, BUT when I
load a page that forces the lazy loading of the User object, I notice the following Hiberate query being generated:
Select ... from post this_ left outer join user user2_ on this.PostId=user2_.UserId ...
Obviously this is wrong: it should be joining UserId from post with UserId from user, but instead its incorrectly joining PostId from post (its primary key) with UserId from user.
Any ideas? Thanks!
