I wanted to pass the File Location to my Controller I have been using data-bind ="value: x" on each element here but to no available I can't catch the file location.
I'm using this script from Jasny Bootstrap FileUpload
<div class="fileupload fileupload-new" data-provides="fileupload">
<div class="input-append">
<div class="uneditable-input span3"><i class="icon-file fileupload-exists"></i>
<span class="fileupload-preview"></span></div><span class="btn btn-file">
<span class="fileupload-new">Select file</span><span class="fileupload-exists">Change</span>
<input type="file" /></span><a href="#" class="btn fileupload-exists" data-dismiss="fileupload">Remove</a>
</div>
</div>
It would be helpful if you posted your entire form.
I have been struggling with the setup at first only to realize that all I had to do was set :multipart => true in the form.
<%= form_for @item, :html => {:multipart => true} do |f| %>
Once you do that, you should be able to get the file path in the controller. I am not sure if that is a solution to your problem though. Again, it would help if you showed more code and what you are currently getting in the params when you submit the form.
Check out same question with some answers on a different post: jQuery Ajax File Upload
The post by @Adeel solved my needs.
来源：https://stackoverflow.com/questions/13118407/how-to-get-file-location-using-jasny-file-upload