Re: Unprocessed changes on an object without changes

[Fabrice Pipart]

On Aug 28, 2006, at 8:48 PM, Chuck Hill wrote: On Aug 28, 2006, at 10:41 AM, Fabrice Pipart wrote: Hi list ! I recently solved a bug I had but I still wonder why it happened. Could someone help me understand the following? Lets say I have a relationship between A and B : A <<--> B In EOModeler both have diamonds (accessible via code) I have two threads In thread1 (locked of course) I fetch B1 In thread2 (locked of course) I modify B1 : B1.value changed from 1 to 2 I saveChanges() : B1.value is 2 In thread1 I create A1 and call A1.addObjectToBothSidesOfRelationshipWithKey(B1, "B"); I saveChanges At that moment I have my B that has a value back to 1. In thread 1?  In the database?  I would expect it to be 1 in Thread one as it is still locked and that prevents external changes from affecting it.  It should not be 1 in the database. It's one in both actually. And that's what is scary. I don't have any InvalideStateException when I do saveChanges in thread1 B1 is actually changed in thread2 Though only B1's relationship are changed in thread1 I found why. Just because I set the A.B relationship in thread1, B is part of the thread1 ec's "unprocessedChanges" The relationship should be, but not B's values as you have not changed them. What do you mean by "the relationship" ? B in database don't know anything about A, only A has a B foreign id And therefore, its the old value of B that is saved in thread1 If I remove the diamond in Bs relationship it works fine Is this a normal behavior? Do I do something wrong? Sounds odd if it is getting into the database. Just what I thought... Would you like to see the code or other details to help me understand where the problem is ? Fabrice Chuck --  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 www.easyshadow.com International Corporate Consulting Palais de la Scala 1 avenue Henri Dunant Suite 1155 MC - 98000 Monaco Skype: fabrice.pipart Tel.  +377 97 98 21 04 (direct) Fax. +377 97 70 88 07

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