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Today's Topics:
1. Re: Delete statement (Ken Anderson)
2. Re: Delete statement (Chuck Hill)
----------------------------------------------------------------------
Message: 1
Date: Wed, 4 Apr 2007 12:56:42 -0400
From: Ken Anderson <[EMAIL PROTECTED]>
Subject: Re: Delete statement
To: Frank Stock <[EMAIL PROTECTED]>
Cc: [email protected]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"
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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Message: 2
Date: Wed, 4 Apr 2007 10:09:29 -0700
From: Chuck Hill <[EMAIL PROTECTED]>
Subject: Re: Delete statement
To: WebObjects Dev Apple <[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
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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