铁路宝石档案编辑
原标题：Rails gemfile editing
I m starting a Rails tutorial that tells me to edit the gemfile when creating a new demo app:
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
When I try to bundle install the file, using bundle install --without production, as per the instructions, I get this error:
You need to specify gem names as Strings. Use gem "development" instead.
When I return to the file and change gem :development into gem "development" I m instead told:
Could not find gem development (>= 0) ruby in the gems available on this machine.
I m new to this and really have no idea what to do when one set of clear instructions seems to clash with another and neither works, especially because I don t really understand what any of these terms mean.
Help would be very much appreciated,
最佳回答
:development should be a group, not a gem. Try with this:
group :development do
gem sqlite3 , 1.3.5
end
This means that all the gems inside the development group should be loaded in the development environment. In this case, you won t have the sqlite gem when running in production or test.
The same applies to the production group.
The assets group is loaded only when compiling the assets for the Asset Pipeline.
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