[Glass] GsQuery executing on SortedCollection ...

Dale Henrichs via Glass glass at lists.gemtalksystems.com
Wed May 25 10:11:43 PDT 2016

The index/query subsystems pretty much expects a close to full 
complement of comparison operators and I agree that you might see 
failures depending upon which code paths get taken ..

The the query and indexing code actually uses a set of _idxForCompare 
and _idxForSort methods to evaluate queries, so you should take a look 
at the following methods in Object:


  and consider implementing the appropriate _idxFor methods in your 
classes to avoid MNU on queries.


On 05/25/2016 03:16 AM, Marten Feldtmann via Glass wrote:
> The following code might not work. We have domain objects, which do 
> not respond to #<= method.
>   * We have a sortedCollection of these domain object, but sorted by
>     an attribute of an instance variable (sub-attribute).
>   * GsQuery now tries to build the result and creates a
>     SortedCollection and the domain objects are sorted by #<= and this
>     might fail, because the domain objects do not #<=
> sortedObjects := SortedCollection
>     sortBlock: [ :a :b | a getAddress get importNumber < b getAddress get importNumber ].
> possibleObject addAll: (lots of objects).
> (aGsQuery :=GsQuery fromString: 'each.address.importNumber = 10') on: sortedObjects.
> aGsQuery asArray
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