Check if an API is valid and present into the db and update the number of request made by the client

is_valid_api?(api_key).rb

  def self.valid_api?(api_key)
    if api_key and Apikey.where(:api_key => api_key).present?
      api = Apikey.where(:api_key => api_key).first
      if !api.requests.nil?
        api.requests = api.requests + 1
      else
        api.requests = 1
      end
      api.save
      true
    else
      false
    end
  end