在Rails Gemfile中指定多个gem约束的语法是什么？

Question

对于多个依赖项，Gemfile的正确语法是什么？

尝试使用Capistrano时，出现错误消息：

cap aborted!
NotImplementedError: unsupported key type `ssh-ed25519'
net-ssh requires the following gems for ed25519 support:
 * rbnacl (>= 3.2, < 5.0)
 * rbnacl-libsodium, if your system doesn't have libsodium installed.
 * bcrypt_pbkdf (>= 1.0, < 2.0)
See https://github.com/net-ssh/net-ssh/issues/478 for more information
Gem::LoadError : "can't activate rbnacl (< 5.0, >= 3.2.0), already activated rbnacl-5.0.0. Make sure all dependencies are added to Gemfile."

我将以下内容放入我的Gemfile中：

gem 'rbnacl', '>= 3.2, < 5.0', :require => false
gem 'rbnacl-libsodium', :require => false
gem 'bcrypt_pbkdf', '>= 1.0, < 2.0', :require => false

宝石（要求为false）以前在Gemfile中。

当我添加版本要求时，捆绑安装会出现以下错误：

[!] There was an error parsing `Gemfile`: Illformed requirement [">= 3.2, < 5.0"]. Bundler cannot continue.

 #  from /Users/myname/MySite/Gemfile:70
 #  -------------------------------------------
 #    gem 'capistrano-maintenance', '~> 1.0', :require => false
 >    gem 'rbnacl', '>= 3.2, < 5.0', :require => false
 #    gem 'rbnacl-libsodium', :require => false
 #  -------------------------------------------

Answer 1

使用数组或将其列出：

gem 'rbnacl', ['>= 3.2', '< 5.0']
gem 'bcrypt_pbkdf', '>= 1.0', '< 2.0'