Pass Rails variable through AJAX to partial?

Question

In my Rails app I'm passing a variable to this call: $.get("/parent_submissions/", {submission: d.id}, null, "script");, and I'd like the submission variable to pass through to the partial that is loaded through the controller. The controller action that is routed through /parent_submissions/ is:

def parent
    @submission = Submission.find(params[:submission])
end

That action loads parent.js.erb, which looks like this:

$("body").append( "<%=j render :partial => 'parent', :locals => {:submission => @submission } %>" );

And _parent.html.erb simply looks like this:

<h1>@submission.title</h1>

I checked in my console to see what happens when the get request is called, and it looks like this:

Processing by SubmissionsController#parent as JS
Parameters: {"submission"=>"190", "_"=>"1378443591336"}

This means that the submission value is not null, and is passing the correct submission id through the request correctly. But when the partial is rendered, it just looks like @submission.title.

I assume something is wrong in the controller. Any ideas?

It's ERB. Didn't you miss something? It should be <%= @submission.title %>. — Casper
– Casper, Commented Sep 6, 2013 at 5:38

saihgala · Accepted Answer · 2013-09-06 05:37:48Z

3

You need to change <h1>@submission.title</h1> to <h1><%= @submission.title %></h1> in your partial.

answered Sep 6, 2013 at 5:37

saihgala

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Comments

Anobik · Accepted Answer · 2013-09-06 18:20:47Z

1

if your going to use the instance variable there is not reason for you to pass it in the locals hash.

So this line:

$("body").append( "<%=j render :partial => 'parent', :locals => {:submission => @submission } %>" );

Could just be:

$("body").append( "<%=j render :partial => 'parent' %>" );

If you want to use the locals your partial needs to be the following:

<h1><%= submission.title %></h1>

edited Sep 6, 2013 at 18:20

Anobik

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answered Sep 6, 2013 at 17:13

Camway

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3 Comments

Anobik Over a year ago

Please ear reputation points so by answering in proper places.

Paul Richter Over a year ago

Carnway, I don't believe the last part is necessarily correct; if he is not using the :locals hash, then he would still need the @. Unless I am missing something? If he did use :local, then yes he could access it as you've described.

Camway Over a year ago

The last part is assuming he is going to pass the variable via the locals hash which means inside the partial the submission variable refers to @submission defined in the controller.

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