How do you add a timestamp URI to an image_tag in Rails?

Just like the title says :

 = image_tag @organi开发者_运维知识库zation.logo.url(:cropped)

I want this to appear as

<img src="picture.jpg?23412341234" />

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Isn't this already the default in Rails?

That's called an asset timestamp and should reflect the latest time that the asset was modified.

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Check if you have something as follows in your configuration files (environment.rb, development.rb ...). This line of code disables asset timestamps.

ENV['RAILS_ASSET_ID'] = ''