Display properly formatted JSON data in a Rails view without any escaping needed

After exhausting all options, trying out various helper combinations like raw, html_safe, and to_json along with attempts using ::JSON.encode and CGI.unescape, I still can't seem to properly display well-formed JSON in my view. No matter what I try, it always ends up being HTML escaped.

This is the code snippet from my view:

var campaignData<%= "=" + (raw @campaign.to_json) if @campaign %>;

In my scenario, it's consistently the double quotes that are getting escaped as ". While I could perform a gsub on the quotes, I consider this to be a suboptimal solution for what should be a straightforward and well-documented use case.

Answer №1

The issue lies in the use of the "=" character within the string, which is deemed unsafe and can contaminate other parts of the code.

To address this problem, you have a couple of options:

raw("=" + @campaign.to_json)

or

"= #{@campaign.to_json}".html_safe

Both solutions essentially achieve the same result.

Answer №2

Starting with ActiveSupport version 2.3.3, developers have the ability to use the method .as_json

Answer №3

Have you experimented with the escape_javascript function?

Check out this snippet from the *.haml file that I recently included to validate my response.

:javascript
  var bar=$.parseJSON("#{j @albums.to_json}")

In this code, j serves as a concise substitute for escape_javascript.

Answer №4

Experiment with this helpful function

var campaignData<%=h " =#{raw @campaign.to_json}" if @campaign %>;

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