Allow use https://mjml.io/ in rails

Add this line to your application's Gemfile:

gem 'mjml'

And then execute:

$ bundle

Or install it yourself as:

$ gem install mjml

Mjml.configure do |config|
  config.exec_path = `which mjml`
end

You have to install mjml compiler via npm install mjml to use this gem

In case of you don't set exec_path, The exec_path will be set default as node_modules/mjml/bin/mjml. If you use heroku you can config multiple buildpacks to make it support nodejs

Mjml.render(template_path, template_variable, binding): this render method accept three parameters

• template_path: the location of your template
• template_variable: these variables which be passed to template so that you can use something like this <div><%= name %></div>
• binding: you can get something like mailer binding to support rails path helper

You can use in mailer

body = Mjml.render("#{Dir.pwd}/app/views/template.mjml", { name: 'Mjml parser' })
mail(to: xxx, subject: xxx, body: body, content_type: 'text/html')

and template.mjml

<mjml>
  <mj-body>
    <mj-container>
      <mj-section>
        <mj-column>
          <mj-image width="100" src="https://mjml.io/assets/img/logo-small.png"></mj-image>
          <mj-divider border-color="#F45E43"></mj-divider>
          <mj-text font-size="20px" color="#F45E43" font-family="helvetica">Hello <%= name %></mj-text>
        </mj-column>
      </mj-section>
    </mj-container>
  </mj-body>
</mjml>

To support render partial inside template, you have to add this into your mime types

Mime::Type.register_alias "text/plain", :mjml

and you can use in template.mjml

<%= render partial: 'xxxx', formats: [:mjml] %>

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/MQuy/mjml. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.