# module ActiveRecord::Relation::RecordFetchWarning

### Public Instance Methods

exec_queries() click to toggle source

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.

Calls superclass method

    # File lib/active_record/relation/record_fetch_warning.rb, line 14
    def exec_queries
      QueryRegistry.reset

      super.tap do
        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