Ruby on Rails

I am using Carrierwave to upload images in rails4.

In the view page the uploaded image is showing. But, when generating the
pdf,
from this view, the image is not showing.Instead , a blank box is
showing.from many from frorums i got a suggestion that use the absolute
url to display images in pdf

From the view, while inspecting the path is showing as below:

<img alt="Small images" src=" http://127.0.0.1:3000/upload_
files/6/student/image/1/small_images.jpg">

The code i used is:

<%=image_tag Student.find(id).image_url(:small) %>

Can u pls help...

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