耙db：迁移错误-回形针

Question

I have installed Paperclip but I have error when I try to run

rake db:migrate

after

rails generate paperclip asset photo

I get

cannot load such file -- paperclip/tasks/attachments

What is wrong? This folder exists with that file.

Answer 1

尝试使用：

bundle exec rake db:migrate

Answer 2

When I tried downloading it as a plugin (rails plugin install ... ), I saw the same problem. I deleted the plugins from vendor/plugins directory and then added the paperclip gem to gemfile ( gem "paperclip", "~> 3.0" ) and everything now works. You may want to give it a try.

Answer 3

To make sure paperclip is loaded and the version which supports attachments, do

bundle show paperclip

Open the gem in text editor and check if paperclip/tasks/attachments.rb is present. If no, then the version of the gem needs to be upgraded or uninstall all paperclip gem versions and do a fresh install. paperclip-3.5.0 works.

If the version is correct and if it still throws error, include

require 'paperclip'

in your boot.rb.

This forces rails to include the gem at boot time.