gistfile1.txt

  def self.search(params)
    conditions = []
    matches = []
    if params[:first_name].present?
      conditions << "first_name = ?"
      matches << params[:first_name]
    end
    if params[:last_name].present?
      conditions << "last_name = ?"
      matches << params[:last_name]
    end
    if params[:email].present?
      conditions << "email = ?"
      matches << params[:email]
    end    
    User.select("first_name, last_name, email").where([conditions.join(" AND ")].concat matches).where(:active => true)
  end