Re: EOFetchSpecification text to number conversion
Re: EOFetchSpecification text to number conversion
- Subject: Re: EOFetchSpecification text to number conversion
- From: Lachlan Deck <email@hidden>
- Date: Tue, 8 Jul 2008 10:09:31 +1000
On 08/07/2008, at 2:55 AM, Chuck Hill wrote:
On Jul 7, 2008, at 7:19 AM, Frédéric JECKER wrote:
I recently changed a table primary key column from NUMBER(6) to
NUMBER(12) for a legacy app.
After this change I had a lot of bugs and discovered that search
queries where returning zero rows.
In this legacy app, a lot of fetch specifications are written like
this :
String pid="806000022"; //for the example, in real life this value
is read from a text file.
new EOFetchSpecification("Patient",
EOQualifier.qualifierWithQualifierFormat("nip = " + pid, null),
null);
With debugging on, this gives the following query which returns 0
rows :
<SELECT (...) FROM Pat_Patient t0 WHERE t0.nip = ?" withBindings:
1:8.06E8(nip)>
Now, when using an Integer instead a String :
String pid=":806000022";
new EOFetchSpecification("Patient",
EOQualifier.qualifierWithQualifierFormat("nip = " +
Integer.valueOf(pid), null), null);
Gives the following query which returns the awaited rows.
<SELECT (...) FROM Pat_Patient t0 WHERE t0.nip = ?" withBindings:
1:806000022(nip)>
Any idea which could avoid me rewriting the 200+ fetch
specifications of this app ?
I can't think of any.
Well, because you didn't tell it what type of value you had it
probably tried to convert it to a double of some kind. If you're going
to use qualifierFormat, use the symbols provided. i.e., %d
qualifierWithQualifierFormat("nip = %d", new NSArray(pid));
This is yet another reason to never use
qualifierWithQualifierFormat. If you had used EOKeyValueQualifier,
you would not have this problem.
You probably would in the absence of using Integer.valueOf.
Just say "no" to magic strings.
Yep, what he said.
with regards,
--
Lachlan Deck _______________________________________________
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