Class: ElasticGraph::Indexer::IndexingPreparers::DateTime

Inherits:
Object
  • Object
show all
Defined in:
lib/elastic_graph/indexer/indexing_preparers/date_time.rb

Class Method Summary collapse

Class Method Details

.prepare_for_indexing(value) ⇒ Object

Here we normalize DateTime strings to consistent 3-digit millisecond precision. This is critical for min/max value tracking which uses string comparison via Painless’s ‘.compareTo()` method.

Without consistent precision, string comparison produces incorrect results:

"2025-12-19T04:15:47.53Z" vs "2025-12-19T04:15:47.531Z"
                     ^                              ^
                    'Z' (ASCII 90)  >  '1' (ASCII 49)

This would incorrectly determine that ‘.53Z > .531Z`.

By normalizing all DateTime values to 3-digit precision, we ensure:

"2025-12-19T04:15:47.530Z" < "2025-12-19T04:15:47.531Z"



29
30
31
32
33
34
35
36
37
 
# File 'lib/elastic_graph/indexer/indexing_preparers/date_time.rb', line 29

def self.prepare_for_indexing(value)
  return value if value.nil?
  time = ::Time.iso8601(value)
  time.getutc.iso8601(DATE_TIME_PRECISION)
rescue ::ArgumentError, ::TypeError
  # If the value is not a valid ISO8601 string, return it as-is
  # and let the datastore reject it if necessary.
  value
end