build_count_subquery?(operation, column_name, distinct) — ActiveRecord::Calculations

build_count_subquery?(operation, column_name, distinct)

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Parameters

operation req
column_name req
distinct req

Source

# File activerecord/lib/active_record/relation/calculations.rb, line 657
      def build_count_subquery?(operation, column_name, distinct)
        # SQLite and older MySQL does not support `COUNT DISTINCT` with `*` or
        # multiple columns, so we need to use subquery for this.
        operation == "count" &&
          (((column_name == :all || select_values.many?) && distinct) || has_limit_or_offset?)
      end

Defined in activerecord/lib/active_record/relation/calculations.rb line 657 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::Calculations

Signature

Parameters