Re: ec.saveChages gives null exception (didn't before)
Re: ec.saveChages gives null exception (didn't before)
- Subject: Re: ec.saveChages gives null exception (didn't before)
- From: Chuck Hill <email@hidden>
- Date: Mon, 7 Mar 2005 09:37:34 -0800
It is more likely what you have not done. When you connect to a
database in EOModeler, it caches some database specific information to
the connection dictionary under the jdbc2info key. If you later change
databases (as I recall you have) and don't use EOModeler to connect to
the new database, this jdbc2info will still be for the old database.
I'm not 100% sure that connecting to the new DB will update this, it's
not something I do frequently.
If you inspect the root node in the EOModel you should see this
jdbc2info key. Delete it and save the model. If you want you can then
connect to the new database and save the model, or EOF can regenerate
this information from the database each time it is run. If you are
going to switch back and forth a lot, I would try to avoid saving this
information in the model. Note that if it is not in the model, EOF
will keep two connections to the database open, one for data and one
for this information. In most cases this does not matter, but it will
in you are in a environment where the DB license is on a per connection
basis.
Chuck
On Mar 6, 2005, at 8:08 PM, Drew Thoeni wrote:
For quite some time, this method, and all others that save to the
Class table (like a classroom, not an object definition) worked fine.
I've looked at the SQL that is being generated and it appears fine.
There is only one not-null column in the table (the key) and the
failures are on updates to an existing record. Clearly, something is
null that should not be. And, it seems it's a result of something I've
done. But I've spent about an hour tinkering with this and (probably
in 10 minutes) reached my level of expertise.
Can anyone suggest what I might check into regarding this exception?
[2005-03-06 22:49:59 EST] <main> Waiting for requests...
[2005-03-06 22:58:35 EST] <WorkerThread8>
java.lang.NullPointerException
at
com.webobjects.jdbcadaptor.JDBCAdaptor.isValidQualifierType(JDBCAdaptor
.java:659)
at
com.webobjects.eoaccess.EODatabaseContext.isValidQualifierTypeForAttrib
ute(EODatabaseContext.java:5146)
at
com.webobjects.eoaccess.EODatabaseContext.lockingNonQualifiableAttribut
es(EODatabaseContext.java:5160)
at
com.webobjects.eoaccess.EODatabaseContext.createAdaptorOperationsForDat
abaseOperationAttributes(EODatabaseContext.java:5346)
at
com.webobjects.eoaccess.EODatabaseContext.createAdaptorOperationsForDat
abaseOperation(EODatabaseContext.java:5520)
at
com.webobjects.eoaccess.EODatabaseContext.performChanges(EODatabaseCont
ext.java:6337)
at
com.webobjects.eocontrol.EOObjectStoreCoordinator.saveChangesInEditingC
ontext(EOObjectStoreCoordinator.java:411)
at
com.webobjects.eocontrol.EOEditingContext.saveChanges(EOEditingContext.
java:3148)
at ClassAdmin.saveClass(ClassAdmin.java:63)
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