How to display image pointed by URL in Rails

Put the URL into an img tag inside the view for the page that should display the image.

<%= link_to image_tag post.image %>

You can also use the action view image_tag helper:

<%= image_tag 'http://power.itp.ac.cn/~jmyang/funny/fun4.jpg' %>

Alternatively you can just use the regular HTML tags:

ERB:

<img src="http://power.itp.ac.cn/~jmyang/funny/fun4.jpg">

Haml:

%img{ src: "http://power.itp.ac.cn/~jmyang/funny/fun4.jpg" }

Slim:

img src="http://power.itp.ac.cn/~jmyang/funny/fun4.jpg"

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