尝试在Rails 4项目上安装ActiveAdmin,但遇到以下错误:
Bundler could not find compatible versions for gem "activerecord":
In Gemfile:
activeadmin (>= 0) ruby depends on
activerecord (~> 3.0) ruby
rails (= 4.0.0) ruby depends on
activerecord (4.0.0)
我已经按照这个例子进行操作:在Rails 4中安装Active admin ,并像下面这样将activeadmin添加到gemfile中:
gem 'activeadmin', github: 'gregbell/active_admin', branch: 'rails4'
但仍然无法运行,出现相同的错误。