What is the right way to embed image into email using Rails?

Question

What is the right way to embed an image into email using Rails?

Answer 1

Adding onto Oksana and tdubs' answers

The module tdubs wrote works on desktop, but for the mobile gmail client, the images appeared as attachments. To fix this, do this for the

app/helpers/email_helper.rb

module EmailHelper
    def email_image_tag(image, **options)
        attachments[image] = {
            :data => File.read(Rails.root.join("app/assets/images/emails/#{image}")),
            :mime_type => "image/png",
            :encoding => "base64"
        }
        image_tag attachments[image].url, **options
    end
end

For the rest, follow tdubs's answer.