Module: ActiveRecord::Relation::RecordFetchWarning
- Defined in:
- activerecord/lib/active_record/relation/record_fetch_warning.rb
Defined Under Namespace
Classes: QueryRegistry
Instance Method Summary collapse
-
#exec_queries ⇒ Object
When this module is prepended to ActiveRecord::Relation and
config.active_record.warn_on_records_fetched_greater_than
is set to an integer, if the number of records a query returns is greater than the value ofwarn_on_records_fetched_greater_than
, a warning is logged.
Instance Method Details
#exec_queries ⇒ Object
When this module is prepended to ActiveRecord::Relation and config.active_record.warn_on_records_fetched_greater_than
is set to an integer, if the number of records a query returns is greater than the value of warn_on_records_fetched_greater_than
, a warning is logged. This allows for the detection of queries that return a large number of records, which could cause memory bloat.
In most cases, fetching large number of records can be performed efficiently using the ActiveRecord::Batches methods. See ActiveRecord::Batches for more information.
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# File 'activerecord/lib/active_record/relation/record_fetch_warning.rb', line 16 def exec_queries QueryRegistry.reset super.tap do |records| if logger && warn_on_records_fetched_greater_than if records.length > warn_on_records_fetched_greater_than logger.warn "Query fetched #{records.size} #{@klass} records: #{QueryRegistry.queries.join(";")}" end end end end |