Rails4 - How to pass image_tag as a parameter in Rails app?

Question

I am trying to pass image tag as a parameter.

When I try to hardcode it like below, it works perfectly.

messages_controller.rb

class MessagesController < ApplicationController      

  def create
  .
  .
  Pusher['private-'+pushid.id.to_s].trigger('new_message', 
  {:subject => "You have received a new message from <b>John</b>. 
  <img class=\"img-rounded\" 
  src=\"http://mywebsite.com/images/mini/missing.png\"  />" })
  .
  end

end

I tried the following to make it dynamic but I get syntax errors. I am not able to pass image tag.

class MessagesController < ApplicationController      

  def create
  .
  .
  Pusher['private-'+pushid.id.to_s].trigger('new_message', 
  {:subject => "You have received a new message from <b>"+
  current_user.name.capitalize+"</b>." + 
  <%= image_tag(current_user.avatar.url(:mini)).gsub("\"", "'") %>  })
  .
  end

end

Could someone share how to do it correctly?
Kindly help. Thanks

Answer 1

This should work:

subject = "You have received a new message from "+
"<b>#{current_user.name.capitalize}</b>."+
"#{ActionController::Base.helpers.image_tag(current_user.avatar.url(:mini)).gsub('"', '\'')}"
Pusher['private-'+pushid.id.to_s].trigger('new_message',{:subject => subject})

Within a string you can use #{RUBY_CODE_HERE} to insert ruby.

Edit: I pulled the subject out as a variable and made the string multi-line just so it's easier to see within the width of the stackoverflow answer, you can of course keep it as one line in your program.