Trouble rendering images uploaded with CarrierWave - ruby-on-rails

Question

I'm building a basic Rails 4 application, and seem to have hit a frustrating snag. I've been following the CarrierWave Railscast, and while I'm able to get images to show up on /image/show.html.erb, I've had some difficulties with getting any of the images I've uploaded to display in the gallery each image is associated with.
The strange thing is, there aren't any errors logged. The page loads without any Rails errors coming up in the page or the terminal; the only way I know something is wrong is that the div that images are supposed to appear in doesn't show up at all.
I'm really stumped about this. If you look, the .images div in the show action for galleries renders, but absolutely none of the sub-elements render at all. What am I doing wrong?
Source code here
app/models/image.rb
class Image < ActiveRecord::Base
belongs_to :gallery
mount_uploader :image, ImageUploader
end
app/models/gallery.rb
class Gallery < ActiveRecord::Base
has_many :images
end
app/uploaders/image_uploader.rb
class ImageUploader < 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 => [200, 200]
end
end
apps/views/images/show.html.erb
Below, we can see that images can be rendered without issue, as this is a view for their own respective controller.
<p>
<strong>Title:</strong>
<%= #image.title %>
</p>
<p>
<strong>Description:</strong>
<%= #image.description %>
</p>
<p>
<strong>Image:</strong>
<%= image_tag #image.image_url.to_s %>
</p>
/apps/views/galleries/show.html.erb
This is where everything gets tricky. First off, no matter what I change within the images div, everything within it seems to come up blank regardless. I've tried changing the "for image in #gallery.images" bit several times, but to no avail.
<div id="images">
<% for image in #gallery.images %>
<div class="image">
<%= image_tag image.image_url(:thumb) %>
<%= image.description %>
<div class="name"><%= image.title %></div>
<div class="actions">
<%= link_to "edit", edit_image_path(image) %> |
<%= link_to "remove", image, :confirm => 'Are you sure?', :method => :delete %>
</div>
</div>
<% end %>
<div class="clear"></div>
</div>
<p>
<%= link_to "Add a Painting", new_image_path(:gallery_id => #gallery) %> |
<%= link_to "Remove Gallery", #gallery, :confirm => 'Are you sure?', :method => :delete %> |
<%= link_to "View Galleries", galleries_path %>
</p>

Answer 1

You need to associate the gallery and the image. One option is to pass the gallery_id to the new action like you do now, set it in the controller on the new image, add a hidden field to transport it to the create action and whitelist the parameter there.
The other option is to nest the image routes into the gallery routes like so:
resources :galleries do
resources :images
end
This will create URLs like /galleries/123/images/234 and galleries/1233/images/new. You create links to these page for example with edit_galleries_image_path(#gallery, #image). Again you would need to set the correct gallery_id in images#new on the new image but that should then let form_for generate the right path to the create action where you then have the gallery_id parameter available. Going this way rake routes should come in as a handy tool.