Ruby on Rails 2.3，form_tag提交给Rails控制器，未调用JS函数

Question

Current setup: Ruby on Rails 2.3 with Ruby 1.8.7 (don't ask...we're working on it).

form_tag helper is used in a Bootstrap modal to call action in Rails controller. Here's the view (.haml)

- form_tag({:action => 'update_logins'},
{:method => :post, :multipart => true, :id => 'upload_form', :target => 'upload_target', :class=>'form-horizontal' })

The controller action is properly called, but I am returning a call to a Javascript function, and despite numerous attempts, it is not calling the function, but instead appears to be rendering text. Even a simple render statement in the controller doesn't work: render :js => "alert('hello');"

I have a feeling this has to do with how the request header doesn't seem to accept javascript:

Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8

The response header indicates Javascript: Content-Type:text/javascript; charset=utf-8 Content-Type:text/javascript; charset=utf-8

And the response is received properly: alert('hello');

But no success in getting it to actually call any functions.

Any ideas?

Answer 1

I assume you are using SLIM/HAML for templating engine. check if you are generating a <form> tag in your HTML

you can try replacing

- form_tag({:action => 'update_logins'},{:method => :post, :multipart => true, :id => 'upload_form', :target => 'upload_target', :class=>'form-horizontal' })

to

= form_tag({:action => 'update_logins'},{:method => :post, :multipart => true, :id => 'upload_form', :target => 'upload_target', :class=>'form-horizontal' })

this way, it will create a <form> in your html.