Adding strings to Rails JSON output

Question

I need to output custom JSON in order to be backwards compatible with existing software, which is written in Javascript, so I need to wrap my JSON with "parseDate(" at the beginning of it, and ");" at the end of it.

I tried doing it in controller like this

def index
@data = Data.all
@products = Product.all

respond_to do |format|
  format.html
  format.json {render :json => { :products => {:product => @data.name}}}
end

end

And then specify it in the view:

app/views/products.json.erb

<%= p "parseData(" %>
<%= render :json %>
<%= p "};" %>

But it outputs pure JSON completely skipping both "parseData(" and ");", why? How do I make JSON to be printed in the middle of the view and then append strings to the top and bottom?

Simone Carletti · Accepted Answer · 2013-05-09 12:17:29Z

1

JSON renderer supports a callback option.

format.json { render :json => { :products => {:product => @data.name }}, :callback => 'parseDate' }

You can read the implementation in the renderer.rb source code.

answered May 9, 2013 at 12:17

Simone Carletti

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