_hasIndexes usage

Hi,

It is correct to use _hasIndexes message to check if a collection has
indexes ?
(or is only intended for GS internal use)

regards,
bruno


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Bruno,

The leading _ does indicate that the method is intended for GS internal
use only ... we do not guarantee that _ methods will be present in
future versions of the product ... with that said, I don't think there
are any plans to remove the selector in the future, but I can't make any
promises:)

Sending #indexSpec to an UnorderedCollection will return an empty index
spec if there are no indexes on the collection. So `coll indexSpec specs
isEmpty` is probably the best route for the long term. And one could
argue that we should implement isEmpty in GsIndexSpec ... One could also
argue that we should implement a public hasIndexes.

To help with these arguments, what is your use case for needing _hasIndexes?

Dale

On 6/5/20 12:36 PM, bruno buzzi brassesco via Glass wrote: _______________________________________________
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Dale,

Ok, then i will use your recommendation (i know _xxx is for internal
usage) but i did not search too much to find #indexSpec message.

A Java Web App display Forms with paging behavior (forms are stored in
GS) it call a REST GS Service with the page size and the page number
(the entire collection to display must be sorted by #modifiedTime inst
var).

If the collection is small asSortedCollection can be used without
problems. But if the collection is too big asSortedCollection is out of
the equation.

The collection with forms can have or not an index by #modifiedTime, if
it has an index then i want to use it with aGsQuery readStream or
aGsQuery reversedReadStream.

The at some point something like this is done:
     instances _hasIndexes
     ifTrue: [self fetchIndexedFormsInstancesOn: instances from:
startIndex to: endIndex] "use aGsQuery readStream"
     ifFalse: [self fetchUnIndexedFormsInstancesOn: instances from:
startIndex to: endIndex] "use asSortedCollection"

regards,
bruno
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