pass params to mailer preview

[equivalent]

ability to pass Rails::MailersControlle params to ActionMailer::Preview instances (e.g. MyMailerPreview)

...sounds stupid but hear me out

Imagine you need create a feature where you need to preview different email types for different clients, which has some different states. you don't want to replicate my MyMailerPreview in several classes (MyMailerPreviewClientTypeA, MyMailerPreviewClientTypeB, ...) you want it to be dynamic:

class MyMailerPreview < ActionMailer::Preview 

   def good_news
     MyMailer.good_news(client)
   end

   def bad news
     MyMailer.bad_news(client)
   end

   private

     def client
        Client.find(params['client_id']) || Client.find_by email: 'default@client.test'
     end
end

[equivalent]

reference that this may be related to more people https://stackoverflow.com/questions/26068629/passing-params-into-mailview-or-actionmailerpreview-in-ruby-on-rails/26100448#26100448

[mszyndel]

👍 for getting this merged into Rails!

[equivalent]

I've created alternative PR that may be better solution

• Mailer preview request model #20646
• Mailer preview request model #21702

[equivalent]

meanwhile I've created patch-gem that is similar functionality if anyone is interested https://github.com/equivalent/mailer_preview_request_model (I'm using it in one application)

[thinkclay]

I found a more elegant way (I think) to handle this. TL;DR just use an initializer to extend ActionMailer::Preview from ActionController::Base