How to add class to an image_tag rails helper

Your class has to be assigned inside of the brackets to be used as part of the options being passed through. Try:

<%= image_tag(iterator.image.url(:small), :class => "img_preview") %>

ruby-on-rails image helper lccs

For newbies like myself, heres a cleaner version with the newer rails syntax:

<%= image_tag iterator.image.url(:small), class:"img_preview" %>

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