Probably one if the simplest mistake I have ever done. But got stucked
with this for an hour before I would figure out what was wrong.
But with this if you will try to extract the file in your controller,
params[:model][:image].read will give an error:
NoMethodError (undefined method `read’ for “<file.jpg>”:String)
So how come the image file became a String? Well, if you have done a
silly mistake like me than you have forgotten to add the “multipart”
value in the form.
So simply add this to your form_for tag and it would work like a charm.