Rails render JSON using <%= not working as expected

Question

I'm currently trying to return multiple JSON objects in one of my controllers as such.

  @chromosomes = @organism.chromosomes.to_json
  @file_data = current_user.files.to_json
  respond_to do |format|
    format.html
  end

However, on the front end when I do:

 <%= @chromosomes %>

or

  <%= @file_data %>

I don't get a JSON object, instead I get the data as a string with things such as &quote, etc. I've tried parsing the string such as

console.log($.parseJSON("<%= @chromosomes %>"));

but it still isn't working. Is this is because the request being sent back is html?

Thanks!

You've edited the question, but the answer is still the same, see below... — Snips
– Snips, Commented Apr 9, 2012 at 14:31

Snips · Accepted Answer · 2012-04-09 14:06:56Z

2

Your code should look something like this,

respond_to do |format|
    format.html index.html.erb
    format.xml  { render :xml => @organism.chromosomes) }
    format.json { render :json => @organism.chromosomes) }
end

answered Apr 9, 2012 at 14:06

Snips

6,8238 gold badges45 silver badges67 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

xdazz · Accepted Answer · 2012-04-09 14:43:59Z

0

You just need

render :json => @organism.chromosomes

By looked at you edit, I think what you want is below:

console.log($.parseJSON("<%= raw @chromosomes %>"));

edited Apr 9, 2012 at 14:43

answered Apr 9, 2012 at 14:04

xdazz

161k38 gold badges255 silver badges278 bronze badges

1 Comment

Phillip Whisenhunt Over a year ago

Thanks, but, I'm still not getting a json object on the front end when I output it. I've updated the question with further details. Thanks again!

Community · Accepted Answer · 2017-05-23 10:08:50Z

0

The problem ended up lying in the fact that Rails encoded the json data as a string, which is the default. To fix the issue I used

 <%= @chromosomes.html_safe %>

on the front end. Further info about this can be found here:

Weird JSON Javascript problem in Rails

edited May 23, 2017 at 10:08

CommunityBot

11 silver badge

answered Apr 9, 2012 at 14:53

Phillip Whisenhunt

1,3152 gold badges18 silver badges30 bronze badges

Comments

Yanhao · Accepted Answer · 2012-04-09 15:06:06Z

0

This should work, for Rails 2,

console.log($.parseJSON(<%= @chromosomes.dump %>));

for Rails 3,

console.log($.parseJSON(<%= @chromosomes.dump.html_safe %>));

String#dump escapes the characters and makes parseJSON() work. Notice that no quotation marks needed.

answered Apr 9, 2012 at 15:06

Yanhao

5,3021 gold badge24 silver badges15 bronze badges

Collectives™ on Stack Overflow

Rails render JSON using <%= not working as expected

4 Answers 4

Comments

1 Comment

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

Comments

1 Comment

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related