This is straight from the “file_column website”:http://www.kanthak.net/opensource/file_column/:

Just make the “image” column ready for handling uploaded files…

class Entry < ActiveRecord::Base
file_column :image
end

… generate file fields *that keep uploaded images during form redisplays to your view…

<%= file_column_field “entry”, “image” %>

… and display uploaded images in your view:

<%= image_tag url_for_file_column(”entry”, “image”) %>

However, you may want to protect against the model object having no uploaded image:

<%= image_tag url_for_file_column(”entry”, “image”) if @entry.image %>

To resize every uploaded image to a maximum size of 640×480, you just have to declare an additional option.

class Entry < ActiveRecord::Base
file_column :image, :magick => { :geometry => “640×480>” }
end

You can even automatically create versions in different sizes that have nice filenames…

class Entry < ActiveRecord::Base
file_column :image, :magick => {
:versions => { “thumb” => “50×50″, “medium” => “640×480>” }
}
end

… and display them in your view:

<%= image_tag url_for_file_column(”image”, “entry”) %>

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