• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag
 

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re: NullPointerException in many-many relationship cross two models
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: NullPointerException in many-many relationship cross two models

  • Subject: Re: NullPointerException in many-many relationship cross two models
  • From: Kieran Kelleher <email@hidden>
  • Date: Tue, 15 Dec 2009 06:55:15 -0500
Chuck, you are mean! ;-)

Ren, here is connection URL example:

jdbc:mysql://myhost/mydatabase? capitalizeTypenames=true&useUnicode=true&characterEncoding=UTF-8

Also, changing the my.cnf will not magically change databases and tables that have been previously created without UTF-8.


See the CREATE DATABASE and CREATE TABLE statement docs online. YOu can verify a table's current encoding with SHOW CREATE TABLE. I *think* you can even have different encodings on different columns if you really want to ..... that of course if the versatility of the wonderful MySQL. The reference manual is generally comprehensive
http://dev.mysql.com/doc/refman/5.0/en/
http://dev.mysql.com/doc/refman/5.0/en/charset.html

HTH, Kieran

On Dec 14, 2009, at 10:59 PM, Chuck Hill wrote:

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





"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."

_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list
(email@hidden) 
Help/Unsubscribe/Update your Subscription:



@global-
v 
illage.net

This email sent to email@hidden 

--
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










"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." 
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:

@mdimen 
sion.com

This email sent to email@hidden 


_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
email@hidden

This email sent to email@hidden



"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."
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:

illage.net

This email sent to email@hidden 

--
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










"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."
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:

This email sent to email@hidden 

--
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







_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden


_______________________________________________
Do not post admin requests to the list. They will be ignored.
Webobjects-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden




  • Follow-Ups:

      

    • Re: NullPointerException in many-many relationship cross two models

      • From: David Avendasora <email@hidden>
      • 





References: 


 >RE: NullPointerException in many-many relationship cross two models (From: "Ren, Kevin" <email@hidden>)


 >Re: NullPointerException in many-many relationship cross two models (From: Chuck Hill <email@hidden>)






    

  • Prev by Date:
Getting a Connection When Created?

    • 

  • Next by Date:
Re: Getting a Connection When Created?

    • 

  • Previous by thread:
Re: NullPointerException in many-many relationship cross two models

    • 

  • Next by thread:
Re: NullPointerException in many-many relationship cross two models

    • 

  • Index(es):

      

    • Date
      • 

    • Thread
      • 

    

    •