Ruby on Rails: How do you check if a file is an image?

Question

How would you check if a file is an image? I\'m thinking you could use an method like so:

def image?(file)
  file.to_s.include?(\".gif\") or file.to_s.includ         


        

Answer 1

Please check it once

MIME::Types.type_for('tmp/img1.jpg').first.try(:media_type)
=> "image"

MIME::Types.type_for('tmp/img1.jpeg').first.try(:media_type)
=> "image"

MIME::Types.type_for('tmp/img1.gif').first.try(:media_type)
=> "image"

MIME::Types.type_for('tmp/ima1.png').first.try(:media_type)
=> "image"