CODEWITHSUNDEEP
ruby-on-railsajax
Cjmarkham
Cjmarkham

Reputation: 9681

Rails render partial with data from params in controller

I am trying to render a partial from the controller (ajax request to controller which renders partial so JS can insert into DOM).

Code for the partial is simple. It requires an object

View

= render "partials/foo", object: @bar

Partial

= object.name

This works fine from the view. But when I try this from the controller (passing params in as the object) I get the error undefined variable object

Controller

render "partials/foo", object: params[:data]

params[:data] is just a hash

Upvotes: 0

Views: 1521

Answers (1)

gabrielhilal
gabrielhilal

Reputation: 10769

Be careful with :object, as it will expect a variable with the same name as the partial (minus the underscore). You can rename the variable using the :as option.

if you set render partial: "foo", object: @foo you will have a variable foo in the partial.

It is the same as render partial: "foo", locals: { foo: @foo }

You can use :locals, so you can set a hash of objects in your partial. Assuming that params[:data] is a hash:

params[:data] = {a: 'something', b: 'another thing'}
render "partials/foo", locals: params[:data]

In your partial you will be able to use the variables a and b.

Or, you can define your own variable if params[:data] has a simple value: 

params[:data] = 'something'
render "partials/foo", my_variable: params[:data]

In your partial you will be able to use my_variable.

Upvotes: 2

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