[OPENJPA-2678] MultiValuedTrasveralAttempt not evaluated when there is another field with the same name in the path

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.4.1
• Component/s: kernel
• Assignee: Unassigned
• Reporter: Gonzalo Diethelm Guallar
• Created: 10/Nov/16 12:36
• Updated: 10/Nov/16 12:36

Description

Problem

MultiValuedTrasveralAttempt not evaluated when there is another field with the same name in the path.

Steps:

1. Create a client entity as:

@Entity
public class Client {

    @Id
    @GeneratedValue
    private Integer id;

    @OneToMany
    private Collection<Product> products;

...

2. and a Product:

@Entity
public class Product {

    @Id
    @GeneratedValue
    private Integer id;

    @ManyToOne
    private Client client;

    private Boolean deleted = false;

...

3. Run this query:

SELECT DISTINCT c
FROM Client c JOIN FETCH c.products
WHERE c.products.deleted = false

Result is: "JPQL does not allow traversal through multi-valued relation path. Try join instead"

4. Add a deleted field to the client:

private Boolean deleted;

5. Run the query again

No errors!

Expected result:

Same exception when client have a deleted field

org.apache.openjpa.kernel.exps.AbstractExpressionBuilder.traversePath is finding the wrong deleted field in the c.products path (the client.delete) and isMultiValuedTraversalAttempt is never evaluated