user search method

def user_search
    params[:user] ||= {}
    if !params[:user].empty?
      username ="%" +params[:user][:username] +"%"
      email = "%" +params[:user][:email] +"%"
    end
    params[:user].delete_if {|key, value| value.blank? }
    @users = params[:user].empty? ? [] : User.user_search(username, email)
end

#and added in User model
#scope :user_search, lambda { |username, email| where("username LIKE ? and email LIKE ?", username, email) }