Method: Arel::SelectManager#union

Defined in:
activerecord/lib/arel/select_manager.rb

#union(operation, other = nil) ⇒ Object 



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# File 'activerecord/lib/arel/select_manager.rb', line 198

def union(operation, other = nil)
  if other
    node_class = Nodes.const_get("Union#{operation.to_s.capitalize}")
  else
    other = operation
    node_class = Nodes::Union
  end

  node_class.new self.ast, other.ast
end