Rails 4 - MissingTemplate/Missing Partial Error, Only in Production

Question

We just secured our application with an SSL certificate. Moving to HTTPS is proved more complex than we thought and we're currently sorting through a few of the resulting bugs.

We have an AJAX call in CoffeeScript, where rails responds by rendering the html of a partial. This is working perfectly in development.

CoffeeScript:

coffee_method: (pos, uid) =>

  $.ajax '/contoller/test/',
    type: 'POST'
    data:
      pos: pos
      uid: uid
    success: (data) ->
      $('#result-div').html(data) #Populates side menu with _next_destination_menu content
    error: ->
      alert 'How embarassing! Something went wrong - please try your search again. '

Controller:

def test
  ... #do some stuff

  puts "format requested: #{request.format}"
  puts "format url_encodeded: #{request.format.url_encoded_form?}"

  render partial: 'trips/_test' #app/views/trips/_test.html.erb

end

However, in production, we get the following error: ActionView::MissingTemplate (Missing partial trips/_test with {:locale=>[:en], :formats=>[:url_encoded_form], :variants=>[], :handlers=>[:erb, :builder, :raw, :ruby, :coffee, :jbuilder]}.

After some digging, I figured out the request in production was a different format. Using those puts lines in the controller to debug, here are the results:

Production:

format requested: application/x-www-form-urlencoded
format url_encodeded: true

Development:

format requested: */*
format url_encodeded: false

What is the best way to handle this issue. Do I:

• Change the content type of every AJAX call in the CoffeeScript?
• Add a respond_to...format.url_encoded_form {render partial: trips/test} to the controller?

The latter seems like I would be duplicating code, because I want to render the same partial, regardless of the format the request comes in. I tried format.all {...} but encountered the same issue. Any best practices are appreciated!

Update:

Specifying the response type directly gives me the same missing template error:

respond_to do |format|
  format.html  {render partial: 'trips/test'}
  format.json  {render partial: 'trips/test' }
  format.url_encoded_form {render partial: 'trips/test'}
end

Update 2:

The Request headers for both localhost and production are the same, the content type is application/x-www-form-urlencoded, even though format.url_encoded_form? returns false.

Accept:*/*
Accept-Encoding:gzip, deflate, br
Accept-Language:en-US,en;q=0.8,zh-CN;q=0.6,zh;q=0.4
Connection:keep-alive
Content-Length:37
Content-Type:application/x-www-form-urlencoded; charset=UTF-8

Answer 1

You could try passing in the format, locale, and handlers exactly as requested:

render(
     partial: 'trips/test',
     formats: [:html, :js, :json, :url_encoded_form],
     locale: [:en],
     handlers: [:erb, :builder, :raw, :ruby, :coffee, :jbuilder])