Re: NullPointerException in many-many relationship cross two models
Re: NullPointerException in many-many relationship cross two models
- Subject: Re: NullPointerException in many-many relationship cross two models
- From: Chuck Hill <email@hidden>
- Date: Mon, 14 Dec 2009 19:42:16 -0800
On Dec 14, 2009, at 7:37 PM, Ren, Kevin wrote:
Hi,
You are brilliant, guys. It's simple copy/past error in the URL.
jdbc:mysql://156.13.128.28:3306/school?
useUnicode=true&characterEncoding=UTF8
One was using characterEncoding=UTF-8 instead of UTF8, causing this
problem.
Now I change them both to UTF8 and works,
UTF-8 is the correct form
Chuck
-----Original Message-----
From:
webobjects-dev-bounces+kevin.ren=email@hidden
[mailto:webobjects-dev-bounces+kevin.ren=email@hidden.c
om] On Behalf Of Mike Schrag
Sent: Tuesday, 15 December 2009 4:25 p.m.
To: Development WebObjects
Subject: Re: NullPointerException in many-many relationship
cross two models
same connection dictionary like "i think they're the same
because the url is the same" or same like "i tested with
.equals(..) at runtime and it returns true thereby proving
they're the same" (technically they don't have to be exactly
.equals, but if they are .equals, they are same-enough)
On Dec 14, 2009, at 10:22 PM, Ren, Kevin wrote:
HI,
I checked that, they are same connection dictionary,
because this just moral test example.
Not using WOnder,
Thanks
Kevin
-----Original Message-----
From: Chuck Hill [mailto:email@hidden]
Sent: Tuesday, 15 December 2009 4:18 p.m.
To: Ren, Kevin
Cc: email@hidden
Subject: Re: NullPointerException in many-many
relationship cross two
models
Both models need to have the exact (and I _do_ mean _exact_) same
connection dictionary. The dictionaries must be equals().
This is
most easily accomplished by setting the programatically
when the app
loads. Wonder, of course, does this.
Chuck
On Dec 14, 2009, at 3:30 PM, Ren, Kevin wrote:
Hi,
There is m-m relationship between A and B entities which are in
different models, but in same database. I can create and
platen this
relationship in EOModler and got AB table as well.
AB is in the same DB and only has compound PK like A_ID and B_ID.
When I tried to do saveChanges got this error
[2009-12-15 12:6:48 NZDT] <WorkerThread0>
java.lang.NullPointerException
at
com
.webobjects
.eoaccess
.EODatabaseContext
.primaryKeyForIntermediateRowFromSourceObject(EODatabaseContext.java:
4845)
at
com
.webobjects
.eoaccess
.EODatabaseContext
.databaseOperationForIntermediateRowFromSourceObject
(EODatabaseContext.java:4863)
at
com
.webobjects
.eoaccess
.EODatabaseContext
.recordInsertForIntermediateRowFromSourceObject
(EODatabaseContext.java:4888)
at
com
.webobjects
.eoaccess
.EODatabaseContext
.relayAttributesInRelationshipSourceObjectDestinationObject
(EODatabaseContext.java:4913)
at
com
.webobjects
.eoaccess
.EODatabaseContext
.relayAttributesInRelationshipSourceObjectDestinationObjects
(EODatabaseContext.java:4966)
at
com
.webobjects
.eoaccess
.EODatabaseContext
.recordChangesInEditingContext(EODatabaseContext.java:6036)
at
com
.webobjects
.eocontrol
.EOObjectStoreCoordinator
.saveChangesInEditingContext(EOObjectStoreCoordinator.java:373)
at
com
.webobjects
.eocontrol.EOEditingContext.saveChanges(EOEditingContext.java:3192)
And I found only updateObjects could has two entities's
details and
insertedObjects does not print out anything.
Not sure this does not work in across models or something
else need
setup?
thanks
Xiaowen(Kevin) Ren
Analyst Programmer
Channel Applications, Retail Applications ANZ National Bank
Ltd Level
6 ASB Tower
2 Hunter Street
PO Box 1791
Wellington
Phone: 04 4365363
Fax: 04 8028696
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return e-mail, and do not read, copy, retransmit or otherwise deal
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individual sender only, unless expressly stated to be those of
Australia and New Zealand Banking Group Limited ABN 11 005 357 522,
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(together "ANZ"). ANZ does not accept liability in connection with
the integrity of or errors in the Communication, computer virus,
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the Communication."
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overall knowledge of WebObjects or who are trying to solve specific
problems.
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