Question

I have searched for quite a bit on this issue and cannot seem to get it to work (stackoverflow, the Carrierwave Railscasts).

First off, I have zero issues uploading the image. That is working fine. Now the image is quite big and I would like to make it smaller. Currently my avatar_uploader.rb file is:

require 'carrierwave/orm/activerecord'
class AvatarUploader < CarrierWave::Uploader::Base
  include CarrierWave::RMagick

  storage :file

  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

  version :thumb do
    process :resize_to_limit => [50,50]
  end

  def extension_white_list
    %w(jpg jpeg gif png)
  end

end

After watching the railscasts (even though it’s from the 2011), it seems you have to pass :thumb to your view, such as:

<%= image_tag(user.avatar(:thumb).to_s) %>

This is giving me an error in the browser of:

wrong number of arguments (1 for 0)

I’m not even sure it’s necessary to have to pass :thumb into your view. Is it?

I know this is a fairly easy fix, so any help would be greatly appreciated!

Answer 1

It looks like the syntax has changed, since then. When in doubt, consult the official documentation:

uploader.url # => '/url/to/my_file.png'               # size: 800x800
uploader.thumb.url # => '/url/to/thumb_my_file.png'   # size: 200x200

or, in your case, probably:

user.avatar.thumb.url