Skip to main content
Hanami are officially supported. Instrumenting Hanami applications requires some manual setup. Follow the installation steps in AppSignal, starting by clicking ‘Add app’ on the accounts screen.
Is your application using a combination of Rails, Grape, Hanami, Padrino or Sinatra? Follow our guide for instrumenting multiple Rack applications.
This page describes the integration for the Hanami framework, installed via the “hanami” gem. The Hanami::API framework (from the “hanami-api” gem) is not supported.

​
Installation

After installing the AppSignal gem, add the AppSignal integration after requiring hanami/boot in the config.ru file. 
# config.ru
require "appsignal" # Add this require
require "hanami/boot"

# Load the Hanami integration
Appsignal.load(:hanami)
# Start AppSignal
Appsignal.start

run Hanami.app

# For Ruby gem 3.11 and older
require "appsignal/integrations/hanami" # Add this line

​
Exception handling

Hanami doesn’t have any exception handling by default. The web server (like Puma or Unicorn) will show a basic “internal server error” page if an error occurs in the app. These unhandled exceptions will be reported to AppSignal automatically. The Hanami exception handling guide explains how to add custom exception handling to Hanami applications to render custom error pages. Handled exceptions will not be reported to AppSignal automatically. We recommend adding the following code to the application’s base Action class found in app/action.rb to add exception handling for StandardError. This way, adding exception handling to every action class is unnecessary. In the handle_standard_error method, configured by handle_exception, call the Appsignal.report_error helper to report the exception to AppSignal and not miss any errors reported by your app. (Use the Appsignal.set_error helper when using Ruby gem version 3 or older.) 
# app/action.rb
# auto_register: false
# frozen_string_literal: true

require "hanami/action"

module MyHanamiApp
  class Action < Hanami::Action
    handle_exception StandardError => :handle_standard_error

    private

    def handle_standard_error(request, response, exception)
      # Report the error to AppSignal
      Appsignal.report_error(exception)

      # Render custom error page
      response.status = 500
      response.body = "Sorry, something went wrong handling your request"
    end
  end
end
After you add the Appsignal.report_error method to the Hanami exceptions you want to report, AppSignal will report these errors whenever they occur.