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: "Ren, Kevin" <email@hidden>
- Date: Tue, 15 Dec 2009 17:03:43 +1300
- Thread-topic: NullPointerException in many-many relationship cross two models
Cool, thanks
Kevin
> -----Original Message-----
> From: Chuck Hill [mailto:email@hidden]
> Sent: Tuesday, 15 December 2009 5:00 p.m.
> To: Ren, Kevin
> Cc: email@hidden
> Subject: Re: NullPointerException in many-many relationship
> cross two models
>
> For WebObjects and Java, UTF-8. Not sure what
> MySquirrelyDatabase needs.
>
>
>
>
> On Dec 14, 2009, at 7:51 PM, Ren, Kevin wrote:
>
> >
> > yes, this confused me. In my.cnf default-character-set=utf8
> >
> > I did google search someone said characterEncoding=UTF8 working,
> > others said characterEncoding=UTF-8.
> >
> > Not sure which one is right?
> >
> >
> > Kevin
> >
> >> -----Original Message-----
> >> From: Chuck Hill [mailto:email@hidden]
> >> Sent: Tuesday, 15 December 2009 4:42 p.m.
> >> To: Ran, Kevin
> >> Cc: email@hidden
> >> Subject: Re: NullPointerException in many-many
> relationship cross two
> >> models
> >>
> >>
> >> 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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> >>>>>> v
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> >>>>>>
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> >> --
> >> Chuck Hill Senior Consultant / VP Development
> >>
> >> Practical WebObjects - for developers who want to increase their
> >> overall knowledge of WebObjects or who are trying to solve
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> >> problems.
> >> http://www.global-village.net/products/practical_webobjects
> >>
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> >>
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> >>
> >>
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> --
> Chuck Hill Senior Consultant / VP Development
>
> Practical WebObjects - for developers who want to increase
> their overall knowledge of WebObjects or who are trying to
> solve specific problems.
> http://www.global-village.net/products/practical_webobjects
>
>
>
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>
"This e-mail and any attachments to it (the "Communication") is, unless otherwise stated, confidential, may contain copyright material and is for the use only of the intended recipient. If you receive the Communication in error, please notify the sender immediately by return e-mail, delete the Communication and the return e-mail, and do not read, copy, retransmit or otherwise deal with it. Any views expressed in the Communication are those of the individual sender only, unless expressly stated to be those of Australia and New Zealand Banking Group Limited ABN 11 005 357 522, or any of its related entities including ANZ National Bank Limited (together "ANZ"). ANZ does not accept liability in connection with the integrity of or errors in the Communication, computer virus, data corruption, interference or delay arising from or in respect of the Communication."
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