Wicked pdf image problem

Hello Everyone,

I am using Wicked Pdf to generate pdf file.

In my model, i have method to generate pdf file.

I also need to show image in my pdf file from amazon s3.

Case 1:

i tried using

While i am running that method image not displaying, just a small box only appearing insteat of image.

Case 2:

i tried <%= image_tag(@image.avatar)%>

While i run this, i am getting "rake aborted!

undefined method `image_tag’ for main:Object"

i googled this problem but no clear answer… any help…