Re: Fetching data into an Array

On Oct 24, 2007, at 11:58 AM, Calven Eggert wrote:

I was fetching a list of records from a to-many relationship and none of the records were being displayed in my WORepetition.  My fetch is a simple valueForKey like so:

    NSMutableArray toManyArray = (NSMutableArray) currentRecord.valueForKey("toManyRelationship");

That is not a fetch.  That is accessing an to many relationship which may or may not be a array fault or an array of faults.

That should be fine (a little ugly, but I'll assume you have a reason to access it like this).  If you are not seeing the records, I will guess that the relationship is still an array fault and the fault is not getting fired.  I can't think of why that would be other than violating one of the EOF commandments or messing with the generated EO code so that willRead() does not get called.

Then I tried this for the heck of it:

    NSMutableArray tempArray = (NSMutableArray) currentRecord.valueForKey("toManyRelationship");

    toManyArray = new NSMutableArray();

    toManyArray.addObjectsFromArray(tempArray);

My records were now being displayed.

Can anyone explain to me why this is so?

The second bit of code must be doing something to cause the array fault to be fired.  What you are seeing is not normal.  I suspect the problem lies in your Java code or possibly in a bad build.

Chuck

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Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.

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