OK, so the only way I was able to solve this is that when a keypath
crosses an entity that's abstract and horizontal, I generate new
relationships on the entity the relationship is coming from - one for
each concrete subclass of the abstract entity, then generate an or
qualifier in its place or-ing all the resulting key value
qualifiers. A workaround, but it works!
Ken
On Feb 6, 2007, at 10:54 AM, Ken Anderson wrote:
Everyone,
I swear this has worked in the past - if I'm mistaken, please
remind me!
I have an entity (MemberRuleField) with a relationship to an
abstract entity (MemberRule). MemberRule (and it's sub-entities)
has a relationship called MemberCompanyRole (this defines what
company the rule is for). The inheritance structure is implemented
using horizontal inheritance (separate table for each concrete sub-
entity).
I would like to perform this query:
eos = EOUtilities.objectsWithQualifierFormat(ec, "MemberRuleField",
"memberRule.memberCompanyRole = %@", new NSArray(new Object[]
{memberCompanyRole}));
What I think this should do is create a query for every concrete
sub-entity. Instead, I get this:
SELECT t0.field_values, t0.long_field_values, t0.member_rule_oid,
t0.oid, t0.op, t0.rule_field_oid, t0.trans_id FROM
member_rule_field t0, null T1 WHERE T1.member_company_role_oid = ?
AND t0.member_rule_oid = T1.oid" withBindings: 1:11
(memberCompanyRoleOid)>
I only get one query, and the table name is NULL for the related
table. That unfortunately makes sense, because the memberRule
relationship points to the MemberRule entity, which is abstract and
does not have a table (yes I know, single table inheritance would
solve this problem...and vertical would probably solve it too).
Any thoughts? I would really prefer to use horizontal here...
Ken
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