Re: Single-table inheritance and deep fetch
Re: Single-table inheritance and deep fetch
- Subject: Re: Single-table inheritance and deep fetch
- From: Mike Schrag <email@hidden>
- Date: Mon, 26 Sep 2005 10:11:50 -0400
If you open up B.plist inside the eomodeld folder, is there a "parent
= A;" line inside of that?
On Sep 26, 2005, at 10:09 AM, Daniel Eggert wrote:
Well, the SQL I get has
withBindings: 1:"A"(type)
so it only gets the "A" objects, not the "B" ones. None of the two
(neither A nor B) are marked abstract. Do they have to? I want to
instantiate both A and B.
/Daniel
On Sep 26, 2005, at 3:09 PM, Ken Anderson wrote:
Dan,
It should definitely work. Have you looked at the SQL to see what
the fetch looks like? Are either entity marked as abstract?
Ken
On Sep 26, 2005, at 8:59 AM, Daniel Eggert wrote:
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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