If your EOs are inheriting from EOGenericRecord, they most likely are implementing EOKeyValueCoding, which is an extension to NSKeyValueCoding that uses a couple of special methods to set/retrieve model properties:

- takeStoredValueForKey()
- storedValueForKey()

If you want your EO to behave using standard NSKeyValueCoding rules, try overriding canAccessFieldsDirectly() in your EO class (static method) to return false.

F

--
Faizel Dakri


> On Aug 25, 2021, at 8:50 PM, webobjects-dev@wocommunity.org wrote:
>
> Hi there,
>
> I must be missing something darn obvious; looks like I've missed EOF 101 somehow :/
>
> My EO class, which extends ERXGenericRecord, does not implement modelled property setters. Thus, I assumed takeValueForKey would always fall through handleTakeValueForUnboundKey. Seems not.
>
> I've overridden the methods like this:
>
> ===
> class OCSEnterpriseObject extends ERXGenericRecord {
>  static boolean canAccessFieldsDirectly { NO }
>  void takeValueForKey(value,String key) {
>    println "???takeValueForKey $key"
>    //super.takeValueForKey(value, key) // precisely same behaviour as with the thing below, no difference
>    NSKeyValueCoding.DefaultImplementation.takeValueForKey(this,value,key)
>  }
>  void handleTakeValueForUnboundKey(value,String key) {
>    println "???handleTakeValueForUnboundKey $key"
>    // ... some stuff to simulate setter (eventually using takeStoredValueForKey), not relevant, for it is never called
>  }
>  ...
> }
> ===
>
> It does NOT work as (I've naïvely) presumed.
>
> When eo.takeValueForKey(o,key) is called, I can always see “???takeValueForKey” (naturally), but I *never ever* see “???handleTakeValueForUnboundKey“ for any key amongst modelled attributes. Nothing other (known to me) gets called — not even takeStoredValueForKey, which I've also overridden to log —, but the value is set all right in the EO.
>
> Only if foo is a random (non-existing, non-modelled) string, I can see “???handleTakeValueForUnboundKey“.
>
> Looks like there's some trick in NSKeyValueCoding.DefaultImplementation.takeValueForKey which recognises modelled attributes in EOGenericRecord and fill their values directly, without falling to handleTakeValueForUnboundKey?!? Weird.
>
> Or I must be doing something very far wrong.
>
> Is this documented somewhere? Far as I can say, neither ERXGenericRecord nor EOGenericRecord nor NSKeyValueCoding.DefaultImplementation mentions anything special; NSKeyValueCoding.DefaultImplementation.takeValueForKey should simply check for the accessor (either with or without the _ prefix) and if there is none (which there indeed is not), fall to handleTakeValueForUnboundKey. What am I missing here?
>
> Thanks,
> OC
>
>
>
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