Question

My question is the next:

When i try parse a json params with 'json' gem on RUBY ON RAILS 3 throw this error:

 Unexpected token at 

Example

I have this object in ruby:

Then I have this html code:

<script>
        $("#selected").live('click', function(){
            jQuery.ajax({url: '<%= deselect_all_checkboxes_path %>', data: {contacts: '<%= contacts.to_json %>'}});
        });
</script>

<input type="checkbox" id="selected" value="1" >

I try this code in Rails Console

JSON.parse(json_string.gsub(/"/, "\"")) 

Works ok. However when i try this code:

JSON.parse(params[:contacts].gsub(/"/, "\"")) 

There is a problem in the gsub method. In Rails Console works ok but when i am debugging throw the error message. The problem is with “;” character.

Which could be the error?

Answer 1

Unescape the HTML first and then parse it as straight JSON:

JSON.parse(CGI.unescapeHTML(params[:contacts]))