[CAY-1728] Custom types used for PK are causing grief in relationships

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.1B1, 3.2.M1
• Component/s: Core Library
• Assignee: Andrus Adamchik
• Reporter: Andrus Adamchik
• Created: 22/Jul/12 09:03
• Updated: 28/Oct/12 11:52

Description

1. Map an entity with meaningful PK, type of that PK being a non-standard type for a given type of column (e.g. attached test case demonstrating the problem maps a VARCHAR column to java.util.UUID).
2. Map another entity with an FK to the first entity, and create a to-one relaionship.
3. Fetch entity 2 and try to read the relationship to entity 1. The result is a FaultFailureException similar to this one:

org.apache.cayenne.FaultFailureException: [v.3.2M1-SNAPSHOT ${project.build.date} ${project.build.time}] Error resolving fault for ObjectId: <ObjectId:UuidPkEntity, ID=8251ae98-de42-404c-9cd0-9c1b29410604> and state (hollow). Possible cause - matching row is missing from the database.
at org.apache.cayenne.BaseContext.prepareForAccess(BaseContext.java:316)
at org.apache.cayenne.CayenneDataObject.readProperty(CayenneDataObject.java:174)
at org.apache.cayenne.testdo.testmap.auto._UuidPkEntity.getId(_UuidPkEntity.java:26)
at org.apache.cayenne.access.UUIDTest.testUUIDMeaningfulPkSelectViaRelationship(UUIDTest.java:107)

The reason is that expected ObjectId of the target entity contains a value of type String instead of UUID, so expected and fetched ObjectId do not match, and Cayenne thinks there's no object for relationship.

Issue Links

• depends upon: CAY-1752 DbAttribute should have its own "javaType"