Jbuilder renders blank body with rails 5.0

[gsmetal]

I have latest jbuilder (2.6.0) and latest rails (5.0.0).
API-controller hello:

class HelloController < ActionController::API
  def hello
    @hello = {a: 1, b: 2}
  end
end

routes:

  get '/hello', to: 'hello#hello', format: 'json'

When there is no folder views/hello it renders 204 No Content.
When I add this folder and hello.json.jbuilder inside like this:

json.hello @hello

it renders 200 OK with empty body.

With jbuilder (2.4.1) in same situation it renders as expected:

{
    "hello": {
        "a": 1,
        "b": 2
    }
}

[prathamesh-sonpatki]

I think it might be related to rails/rails#19377 which is the default behavior of Rails 5 to return with 204 no content if no response is specified.

[gsmetal]

There is no problem with 204 with missing template (espesially it logs No template found for HelloController#hello, rendering head :no_content in this case), there is problem with blank body when there is a template.

[realwol]

same problem in 2.6, log said Completed 204 No Content, any update?

[sirwolfgang]

I seem to be getting the same, or very similar issue. My controller is sending back a response with the expected status code of 200(:ok), but my body is empty. The jbuilder template files are not being hit at all, but if I use the json: @instance to by pass it I get a valid serialized response.

Only changing the version of jbuilder does not seem to impact anything. This was a rails 4 to rails 5 project non api project. And it worked pre-upgrade to rails5/jbuilder

If I force it with render 'model/action.json.jbuilder' it still does nothing, but if I point it to a different template path that doesn't exist. It will fail saying not found.

[charleyw]

I got the same problem with:
Rails 5.0.0 Api mode

when i include some gem (eg. devise, wechat)，the controller will return 200 and no content, it even not hit the jbuilder template.

And I checked the gem(wechat) which will cause the problem, if i comment these lines out in the gem https://github.com/Eric-Guo/wechat/blob/master/lib/action_controller/wechat_responder.rb.

  if defined? Base
    class << Base
      include WechatResponder
    end
  end

  if defined? API
    class << API
      include WechatResponder
    end
  end

jbuilder will work again

[yorkxin]

I got the same issue too. But I also found that, if there is a gem makes ActionController::Base to include it's own modules upon initialization (e.g. bugsnag), then jBuilder's hack won't be run, and it will send blank body.

[sirwolfgang]

My project currently uses a gem that does the including via ::ActionController::Base.send(:include, method without issue. The issue in my case that rspec does not render the views in controller tests by default.

RSpec.configure do |config|
  config.render_views = true
end

[freefishz]

It can be solved by adding include ActionView::Rendering as following:

class ApplicationController < ActionController::API
  include ActionView::Rendering
end

Hi, I am new to rails and currently developing my first app, so I am not sure what went wrong. I am using rails 5.0.1 and following steps from https://richonrails.com/articles/getting-started-with-jbuilder.

Here`s what I found: if my app is created without --api tag, then jbuilder works fine. However, when I create an api-only app, I get 204 No content response, with or without "freefishz"'s step. Let me know if you need any information. Thanks

[realwol]

@BOOOMKKK Hi, do you have jbuilder in you gemfile?

@realwol Thanks, I added in and it works!