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Re: Delete statement
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Re: Delete statement


  • Subject: Re: Delete statement
  • From: Chuck Hill <email@hidden>
  • Date: Wed, 4 Apr 2007 10:09:29 -0700

I can almost guarantee this is the problem.  :-)

Chuck


On Apr 4, 2007, at 9:56 AM, Ken Anderson wrote:

Frank,

Upon first glance, your code looks OK, except for the fact that you're not locking your editing context. Since you're allocating a new one, you need to lock it. I suggest you do this:

ec.lock();
try {
// current code
} finally {
ec.unlock();
}

Since your problem is intermittent, it is likely that this is the problem.

Ken


On Apr 4, 2007, at 12:45 PM, Frank Stock wrote:

Hi,

I use SOAP-calls to WO and I get strange effects in the following routine:

public void deleteWebtextValue (String webtext, String language) {

EOEditingContext ec = new EOEditingContext();
EOQualifier aQual;
NSMutableArray qbind;
EOFetchSpecification fs;

LanguageWebtext lwObject;
qbind=new NSMutableArray();
qbind.addObject(webtext);
qbind.addObject(language);
aQual = EOQualifier.qualifierWithQualifierFormat ("(webtext.webtext=%@) and (language.language=%@)",qbind);
fs = new EOFetchSpecification("LanguageWebtext",aQual,null);
NSArray arLanguageWebtext = ec.objectsWithFetchSpecification(fs);
// should only be 1
for (int i=0;i< arLanguageWebtext.count();i++) {
lwObject = (LanguageWebtext)arLanguageWebtext.objectAtIndex(i);
ec.deleteObject(lwObject);
}
ec.saveChanges();

}


Most of the time this results in a delete-statement:
delete from languagewebtext where languagewebtext_id=8788;

but sometimes I get a (strange) update-statement:

update languagewebtext set language_id = NULL, webtext_id = NULL where languagewebtext_id=8898;
Both can't be NULL;
This results in currupting the database!


I don't understand that!


Thanks for helping,
Frank Stock
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References: 
 >Delete statement (From: Frank Stock <email@hidden>)
 >Re: Delete statement (From: Ken Anderson <email@hidden>)

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