Bug using map field?

Question

I have a table AMOUNTS that contains a foreign key into another table
LOAN. The primary key column name in LOAN is LOAN_SK and the foreign key
column to this in the AMOUNTS table is called LOAN_FK. In my .jdo file for
my LOAN class I have this:
<field name="amount">
<extension vendor-name="kodo" key="table" value="AMOUNTS"/>
<extension vendor-name="kodo" key="data-column"
value="AMOUNT"/>
<extension vendor-name="kodo" key="ref-column"
value="LOAN_FK"/>
</field>
When I try to add a new loan object (with an amount field) I get a SQL
error indicating that Kodo is trying to use LOAN_SK as a column name in
AMOUNTS table, not LOAN_FK:
java.sql.SQLException: Column not found: S0022 Column not found: LOAN_SK
in statement [SELECT t0.LOAN_SK, t0.ACTUAL_INTEREST_RATE, t2.AMOUNT,
t0.NOTE_SIGN_DATE, t0.LOAN_PERIOD_BGNG_DATE, t0.LOAN_PERIOD_ENDG_DATE,
t0.SCHOOL_CERTIFICATION_DATE, t0.SCHOOL_USE_ONLY FROM AMOUNTS t2, LOAN t0,
LOAN_PERSON t1 WHERE (t1.PERSON_FK = 1050 AND t0.LOAN_SK = t2.LOAN_SK)]
Am I doing something wrong?
Thanks!

Answer 1

Thanks for the reply, Abe - sorry for my terminology issues! It's really a
1:1 field (I think!), although it's organized funny I know. The AMOUNTS
table holds generic amount data and is tied to a LOAN by the LOAN_FK
foreign key. However LOAN has no reference to AMOUNTS, only an AMOUNTS row
to a LOAN. So when I query a LOAN I get it's amount from the AMOUNTS
table. The SQL I see from KODO looks like what I want/indtended except for
the t0.LOAN_SK = t2.LOAN_SK, which I want to be t0.LOAN_SK = t2.LOAN_FK:
[SELECT t0.LOAN_SK, t0.ACTUAL_INTEREST_RATE, t2.AMOUNT, t0.NOTE_SIGN_DATE,
t0.LOAN_PERIOD_BGNG_DATE, t0.LOAN_PERIOD_ENDG_DATE,
t0.SCHOOL_CERTIFICATION_DATE, t0.SCHOOL_USE_ONLY FROM AMOUNTS t2, LOAN t0,
LOAN_PERSON t1 WHERE (t1.PERSON_FK = 1050 AND t0.LOAN_SK = t2.LOAN_SK)]
I hope that clarifies my problem and intentions, thanks Abe!
Kent
Abe White wrote:
<field name="amount">
<extension vendor-name="kodo" key="table" value="AMOUNTS"/>
<extension vendor-name="kodo" key="data-column"
value="AMOUNT"/>
<extension vendor-name="kodo" key="ref-column"
value="LOAN_FK"/>
</field>
Or is this a 1-M field? In that case you'd need a <collection> element...
Sorry, I can't tell you exactly how to fix this, cause I don't know enough
about your data model and object model.