我正在启动一个Rails教程,告诉我在创建一个新的演示应用程序时编辑gemfile:
source 'https://rubygems.org'
gem 'rails', '3.2.3'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
gem :development do
gem 'sqlite3', '1.3.5'
end
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '3.2.4'
gem 'coffee-rails', '3.2.2'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', :platform => :ruby
gem 'uglifier', '1.2.3'
end
gem 'jquery-rails', '2.0.0'
group :production do
gem 'pg', '0.12.2'
end
# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'
# To use Jbuilder templates for JSON
# gem 'jbuilder'
# Use unicorn as the app server
# gem 'unicorn'
# Deploy with Capistrano
# gem 'capistrano'
# To use debugger
# gem 'ruby-debug19', :require => 'ruby-debug'
当我按照说明使用bundle install
尝试bundle install --without production
文件时,出现此错误:
You need to specify gem names as Strings. Use 'gem "development"' instead.
当我返回文件并将gem :development
更改为gem "development"
时,我被告知:
Could not find gem 'development (>= 0) ruby' in the gems available on this machine.
我是新手,并且当一套清晰的指令似乎与另一套明显冲突并且都不起作用时,我真的不知道该怎么做,特别是因为我并不真正理解这些术语的含义。
非常感谢帮助,
答案 0 :(得分:8)
:development
应该是一个群体,而不是宝石。试试这个:
group :development do
gem 'sqlite3', '1.3.5'
end
这意味着开发组内的所有gem都应该加载到开发环境中。在这种情况下,在生产或测试中运行时,您将没有sqlite gem。
同样适用于制作组。
仅在编译Asset Pipeline的资产时加载资产组。