已经初始化的常量 APP PATH rails

Question

在我的应用程序中安装 devise 3.4.0 gem 后，我收到了这个错误。当我在终端中输入rails s 时，出现以下错误..

[kmartin@localhost register]$ rails s
=> Booting WEBrick
=> Rails 4.2.1 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
bin/rails:6: warning: already initialized constant APP_PATH
/home/kmartin/work/register/bin/rails:6: warning: previous definition of APP_PATH was here
Usage: rails COMMAND [ARGS]

The most common rails commands are:
 generate    Generate new code (short-cut alias: "g")
 console     Start the Rails console (short-cut alias: "c")
 server      Start the Rails server (short-cut alias: "s")
 dbconsole   Start a console for the database specified in config/database.yml
             (short-cut alias: "db")
 new         Create a new Rails application. "rails new my_app" creates a
             new application called MyApp in "./my_app"

In addition to those, there are:
 destroy      Undo code generated with "generate" (short-cut alias: "d")
 plugin new   Generates skeleton for developing a Rails plugin
 runner       Run a piece of code in the application environment (short-cut alias: "r")

All commands can be run with -h (or --help) for more information.

Answer 1

我实际上只是从 3.1 更改了我的设计 gem。只需 gem 'devise' 然后安装捆绑包，我的问题就解决了......似乎 rails 4 不支持 devise 的版本。