Create a custom node on Arel

arel_nodes_trgm.rb

# frozen_string_literal: true

module ArelNodesTrgm
  class Arel::Nodes::Trgm < Arel::Nodes::InfixOperation
    def initialize(left, right)
      super(:"%", left, right)
    end
  end

  class Arel::Visitors::PostgreSQL < Arel::Visitors::ToSql
    alias_method(
      :visit_Arel_Nodes_Trgm,
      :visit_Arel_Nodes_InfixOperation
    )
  end
end

# to use, just "include ArelNodesTrgm"