Single-table inheritance and deep fetch
Single-table inheritance and deep fetch
- Subject: Single-table inheritance and deep fetch
- From: Daniel Eggert <email@hidden>
- Date: Mon, 26 Sep 2005 14:59:21 +0200
Hi,
I can't get a deep fetch to work with single-table inheritance.
I have a class A / entity A and class B / entity B. For my single-
table inheritance I have a 'type' attribute that is set to either 'A'
or 'B'.
Class B inherits from class A, i.e. A is the parent of B.
If I do a deep fetch on A, I'd expect the objects of class B also to
be returned. But that does not happen.
String entityName = "A";
EOFetchSpecification aFetchSpecification;
aFetchSpecification = new EOFetchSpecification(entityName,
(EOQualifier) null, null, true, true, null);
EODatabaseDataSource dataSource = new EODatabaseDataSource
(editingContext(), entityName);
dataSource.setFetchSpecification
(authorsAndReadersFetchSpecification);
The data source only contains objects with type = "A". How do I get
both "A" and "B" in one dataSource?
/Daniel
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