Range Queries fail for MaSearchStringIndex when using Umlauts

> All,
>
> I'm currently using Magma to perform a prefix search on City names. I found
> out that this fails if the string contains umlauts or, to be more precise,
> if the last given char is not Ascii.
>
> E.g.
> myCollection where: [ :reader | reader read: #city from: 'Me' to: 'Me'
> maAlphabeticalNext]
> works fine. Changing the prefix to 'Mü' fails (no result).
>
> I assume that this is somehow connected to a) maAlphabeticalNext and b) the
> "allowed" characters for MaSearchStringIndex (BTW: #beAscii doesn't help
> here). I'm currently using MaByteSequenceIndex to circumvent the problem but
> I am not sure whether this is the intention.
>
> I attached a Testcase which shows the problem.
>
> Thanks,
>
> Udo
>
> _______________________________________________
> Magma mailing list
> [hidden email]
> http://lists.squeakfoundation.org/mailman/listinfo/magma
>
>

> Hi Udo, yes, the index-types that come included with Magma are ASCII
> only.  They are just "working-examples" of how such index-types can be
> written, which may be used by application designers who need more to
> help create their own subclass of MagmaCollectionIndex.
>
>   - Chris
>
> On Wed, Oct 13, 2010 at 2:22 PM, Udo Schneider
> <[hidden email]>  wrote:
>> All,
>>
>> I'm currently using Magma to perform a prefix search on City names. I found
>> out that this fails if the string contains umlauts or, to be more precise,
>> if the last given char is not Ascii.
>>
>> E.g.
>> myCollection where: [ :reader | reader read: #city from: 'Me' to: 'Me'
>> maAlphabeticalNext]
>> works fine. Changing the prefix to 'Mü' fails (no result).
>>
>> I assume that this is somehow connected to a) maAlphabeticalNext and b) the
>> "allowed" characters for MaSearchStringIndex (BTW: #beAscii doesn't help
>> here). I'm currently using MaByteSequenceIndex to circumvent the problem but
>> I am not sure whether this is the intention.
>>
>> I attached a Testcase which shows the problem.
>>
>> Thanks,
>>
>> Udo
>>
>> _______________________________________________
>> Magma mailing list
>> [hidden email]
>> http://lists.squeakfoundation.org/mailman/listinfo/magma
>>
>>