.js.erb file is not executing although rendered in rails

Question

I use rails and haml. I send data via Ajax post to a controller in rails:

$.ajax({
type: 'POST',
url: '/preview-image-upload',
processData: false,
contentType: false,
dataType : 'json',
data: data
});

Then I execute the data and render js in the controller:

respond_to do |format|
 if @previewupload.save
  format.js
 end

The object is saved correctly. Also the .js.erb file is correctly rendered according to the server log:

Rendered path/preview_image_upload.js.erb (0.2ms)
Completed 200 OK in 603ms (Views: 8.1ms | ActiveRecord: 8.5ms)

For testing reasons, I put an alert into the preview_image_upload.js.erb file:

alert("Hello World");

but nothing happens. It looks like the .js.erb file is rendered but not executed.

{ render layout: false, content_type: 'text/javascript' }

But that did not work.

Check net tab in google/chrome or firefox for response from server. — Roman Kiselenko
– Roman Kiselenko, Commented Jul 3, 2015 at 12:47
The response visible in FF Developer is "alert("Hello World");" - no errors are raised. — DonMB
– DonMB, Commented Jul 3, 2015 at 13:34

fylooi · Accepted Answer · 2015-07-03 14:10:34Z

3

The datatype to execute a Rails javascript response from a jQuery AJAX call is script

answered Jul 3, 2015 at 14:10

fylooi

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Comments

DonMB · Accepted Answer · 2015-07-03 13:38:15Z

0

I found the solution. I simply have to remove the dataType attribute in the Ajax request. Makes it look like this:

$.ajax({
type: 'POST',
url: '/preview-image-upload',
processData: false,
contentType: false,
data: data
});

answered Jul 3, 2015 at 13:38

DonMB

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