How to override a file that is causing trouble in Ruby on Rails Spree Commerce App?

问题

After having updated from Rails 3 to Rails 4 and installing the Bootstrap gem for Spree I get an error in app/views/spree/products/_image.html.erb. The page looks as follows after I click on a image of a product on the main page:

 NameError in Spree::Products#show 

 Showing []/ruby/1.9.1/bundler
/gems/spree_bootstrap-a529d6bb6db0/app/views/spree/products/_image.html.erb where line 
#1 raised:

undefined local variable or method `image' for 
#<#<Class:0x000000070139c8>:0x000000068d7da8>

Extracted source (around line #1):

1
2
3
4

    <% if image %>
    <%= image_tag image.attachment.url(:product), :itemprop => "image" %>
    <% else %>
    <%= product_image(@product, :itemprop => "image") %>

Trace of template inclusion: []app/views/spree/products/show.html.erb

Rails.root: []/rails/releases/20140118194836

I know that this can be fixed by changing the file that is ruining it to only contain <%= product_image(@product, :itemprop => "image") %>. And I learned that I need to override files if I want them to change.

So I want to change the code there so locally I added a file with the same path and name (app/views/spree/products/_image.html.erb) with the desired new code. Then I deployed it and when I ssh into the server I see the file. But on the website I still get the same error. Since trace of template inclusion said it came from app/views/spree/products/show.html.erb I also changed that file to it, but I still see the same code on the server.

How do I fix this?

回答1:

Create this file in your project folder, then replace the contents with:

<%= product_image(@product, :itemprop => "image") %>

Or with this:

<% if local_assigns[:image].present? && image %>
  <%= image_tag image.attachment.url(:product), :itemprop => "image" %>
<% else %>
  <%= product_image(@product, :itemprop => "image") %>
<% end %>

And btw, I don't see any need to overwrite app/views/spree/products/show.html.erb if you're only doing it to get rid of the error. The error is within the _image partial, as stated in the GitHub issue.

来源：https://stackoverflow.com/questions/21209138/how-to-override-a-file-that-is-causing-trouble-in-ruby-on-rails-spree-commerce-a