Hi,
! recently discovered this while investigating a particularly transient
bug => If I delete a record which was part of an entity selection and
then create a new one, that replaces the deleted one in the entity
selection.
I can't see anything in the developer docs which explains this, but
posting here before I submit a bug report in case it's actually supposed
to be a feature!
I've tried in v17.1 and v19R6 - same results in both.
---
C_OBJECT ($esSyncOuts) // or var $esSyncOuts : Object (or
cs.sync_outSelection) - makes no difference
// clear any records from previously running this code!
READ WRITE([sync_out])
QUERY([sync_out];[sync_out]sequence=0)
DELETE SELECTION([sync_out])
READ ONLY([sync_out])
// create a record with known ID with lowest possible sequence
CREATE RECORD([sync_out])
[sync_out]ID:="AAAA" // UUID key field
[sync_out]sequence:=0 // Integer
SAVE RECORD([sync_out])
// create ordered entity selection, with new record as the first one
$esSyncOuts:=ds.sync_out.all().orderBy("sequence")
ALERT($esSyncOuts[0].ID) // AAAA as expected
// delete the newly added record - $esSyncOuts[0] becomes undefined
READ WRITE([sync_out])
QUERY([sync_out];[sync_out]sequence=0)
DELETE RECORD([sync_out])
READ ONLY([sync_out])
// create another new record with different known ID with lowest
possible sequence
CREATE RECORD([sync_out])
[sync_out]ID:="BBBB"
[sync_out]sequence:=0
SAVE RECORD([sync_out])
ALERT($esSyncOuts[0].ID) // this is now BBBB!
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