Unable to display remote images in rails - ruby-on-rails

Question

I am using Carrier wave to upload images. But with the default store_dir in the image_uploader.rb file, it is appending the store_dir to my image path. So I am successful in displaying the images that I have uploaded. However, I have a database with remote image urls that are already existing. These remote image urls are not displayed, as it is appending the store_dir to the image path and they are not found.
For eg:
It is taking "http://myapp.com/images/I/51oYEfb%2B0WL.SL160.jpg" as "/uploads/product/productimage/1/http%3A/myapp.com/images/I/51oYEfb%252B0WL.SL160.jpg"
Here is my code:
_product.html.erb
<% #products.each do |product| %>
<li>
<%= image_tag(product.productimage_url) if product.productimage? %>
</li>
<% end %>
Product.rb
class Product < ActiveRecord::Base
mount_uploader :productimage, ProductimageUploader
end
productimage_uploader.rb
class ProductimageUploader < CarrierWave::Uploader::Base
include CarrierWave::MiniMagick
storage :file
def store_dir
"uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
end
end
I even tried nil as below and it still appends / to the image url:
def store_dir
nil
end

Answer 1

I'm assuming you must have loaded the remote urls into your products' table's productimage column.
Perhaps the simplest way to accomplish your goal would to be add something like a remote_url column to the products table and not put remote URLs in the productimage column. Then you could do something like:
Class Product < ActiveRecord::Base
def image_url
productimage.present? ? productimage_url : remote_url
end
end
Then change your view to:
<%= image_tag(product.image_url) if product.image_url.present? %>
If your products table is already populated with remote urls from your app previously using something other than carrierwave, another option that might be better would be to write a rake task to download and re-save them with carrierwave. That might look something like:
Product.all.each do |product|
temp_location = Rails.root.join('tmp', File.basename(product.attributes['productimage']))
uri = URI(product.attributes['productimage'])
Net::HTTP.start(uri.host, uri.port, :use_ssl => uri.scheme == 'https') do |http|
request = Net::HTTP::Get.new uri
http.request request do |response|
File.open(temp_location, 'w') do |file|
response.read_body do |chunk|
file.write chunk
end
end
end
end
product.productimage = File.open(temp_location)
product.save!
File.unlink(temp_location)
end