CODEWITHSUNDEEP
javascriptruby-on-rails
biagidp
biagidp

Reputation: 2185

Rendering html.erb templates in javascript

I'm running rails 4.0.4. I have a form I'm using a partial in to add a subset of fields. The user has the option to remove those fields and replace them with other fields once they're on the page. I'd like to be able to add those fields back in in the event that they want to undo their decision.

Render isn't available in javascript files (which seems odd for js.erb files). I've gotten as far as using the following to read the text of the file into a variable.

var master_quantity = "<%= data='';File.open("#{Rails.root}/app/views/shared/_a2a_master_quantity.html.erb","r").each_line{|x| data+=x};data %>";

Unfortunately escape_javascript doesn't appear to be available in the asests folder either, so I'm unable to use this string as it breaks the javascript.

Anyone have any suggestions on cleaning the string or alternate methods to get the partial into my javascript?

Upvotes: 0

Views: 1355

Answers (2)

dcorking
dcorking

Reputation: 1206

If I understand your question, and the partial never changes, you won't need to get it from the server. Just hide it in CSS (such as with JQuery's $('#selector').hide() )

On the other hand, if you need Ruby to customize your partial each time the user restores it, you can send an AJAX request from the browser to your server to request a new version of the partial.

Add a line to a suitable controller action that renders your partial:

render :partial => 'a2a_master_quantity' and return if request.xhr?

Make a suitable XML HTTP Request in your JavaScript to get this partial (such as JQuery's $.ajax().)

Then use JavaScript to add it to the DOM in the appropriate place.

Upvotes: 0

Michael De Silva
Michael De Silva

Reputation: 3818

You could try,

controller = ActionController::Base.new
controller.send(:render_to_string, '/shared/a2a_master_quantity')

Whatever you pass to render_to_string above are params for that method. You may or may not need that leading '/' for '/shared'.

Upvotes: 1

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