IMHO this doesn't sound like an ideal way to do this. At a high level what
are you trying to do? Is this a legacy DB or starting from scratch? If I had
to do something like this I would instead use something like
MappedLongForeignKey so that you have a direct reference to the other tables
instead of having to do it manually. Something like:
class C extends LongKeyedMapper[C] with IdPK {
def getSingleton = C
object refA extends MappedLongForeignKey(this,A)
object refB extends MappedLongForeignKey(this,B)
def getRef = refA.obj or refB.obj
def setRef(obj : A) = refA(obj); refB(Empty)
def setRef(obj : B) = refB(obj); refA(Empty)
}
Derek
On Wed, Dec 9, 2009 at 9:44 PM, Joern joern.bernha...@gmx.net wrote:
Hi there,
I want to create a MappedField, which has one column as Type Long and
another column as Type Boolean, but I don't know, what I should put
into dbFieldClass and/or targetSQLType. If I look at MappedPassword
for example, I just see classOf[String] or Types.VARCHAR, which
somehow makes sense, because all columns of the MappedPassword are
Strings. How can I create such a MappedField ?
Or maybe there is a completely different and/or better way to approach
my problem:
I have two tables (A and B), which are represented by my own mapper
classes having IdPK.
In a third table (let's call it C), I want to reference an instance of
A or B in table C. As mentioned above, I want to say for example that
Boolean false means look in table A for the Long (=index) and true
- look in table B.
Any tips, pointers or links to more documentation about multi-column
mappedfields? :)
Thanks,
Joern
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