Getting undefined method `react_component' for...

[odk211]

How to reproduce

Install webpacker and webpacker-react.
https://github.com/rails/webpacker#installation
https://github.com/renchap/webpacker-react#installation

Gemfile

gem 'webpacker', git: 'https://github.com/rails/webpacker.git'
gem 'webpacker-react'

Install Commands

rails webpacker:install
rails webpacker:install:react
./bin/yarn add webpacker-react

Write some install stuff.
And when open page with <%= react_component 'SomeComponent' %>
I got this error.

ActionView::Template::Error (undefined method `react_component' for .....

Other info

Add Helper manually in ApplicationController and everything is fine.

class ApplicationController < ActionController::Base
  helper Webpacker::Helper
end

I find related issue in webpacker.
rails/webpacker#172
That issue is closed with this PR
https://github.com/rails/webpacker/pull/288/files

I think the following hook is needed, but I'm not sure.

ActiveSupport.on_load :action_view do
   include ::Webpacker::React::Helpers
end

react-rails has same code.
https://github.com/reactjs/react-rails/blob/master/lib/react/rails/railtie.rb#L60...L62

[renchap]

Are you using Active Admin too?

[odk211]

No, I do not use. But I use another rails engine blazer and health_check.

It seems health_check gem use ActionController::Base
https://github.com/ianheggie/health_check/blob/master/lib/health_check/health_check_controller.rb#L5
blazer use ApplicationController
https://github.com/ankane/blazer/blob/master/app/controllers/blazer/base_controller.rb#L2

[philayres]

@odk211 is gem webpacker in your Gemfile in the production section, or just in a development and test block? I just struggled with this for hours, before realising that my issues were related to the gem not being available when I moved to production.

[odk211]

@philayres When I use this gem, I use webpacker-react , webpacker in all environment.

[renchap]

This should be fixed in the latest (0.3.2) release.