Question

我正在运行bundle install

时收到以下消息

Your Gemfile lists the gem sqlite3 (= 1.3.5) more than once.
You should probably keep only one of them.
While it's not a problem now, it could cause errors if you change the version of just one of them later.

Your Gemfile lists the gem rspec-rails (= 2.10.0) more than once.
You should probably keep only one of them.
While it's not a problem now, it could cause errors if you change the version of just one of them later.

Your Gemfile lists the gem rspec-rails (= 2.10.0) more than once.
You should probably keep only one of them.
While it's not a problem now, it could cause errors if you change the version of just one of them later.

Your Gemfile lists the gem pg (= 0.12.2) more than once.
You should probably keep only one of them.
While it's not a problem now, it could cause errors if you change the version of just one of them later.

我在Heroku中使用Postgresql，我相信我在开发和测试中都使用Postgresql。我最近从sqlite迁移/切换到postgresql。

我是否还需要sqlite3 gems：development或in：development，：test？

最后，开发与开发之间是否存在差异？：开发，：测试？

的database.yml

development:
  adapter: postgresql
  encoding: unicode
  database: xxxxxx_development
  pool: 5
  username: xxxxxx
  password:

test:
  adapter: postgresql
  encoding: unicode
  database: xxxxxx_development
  pool: 5
  username: xxxxxx
  password:

的Gemfile

gem 'rails', '3.2.11'
gem "bootstrap-sass"
gem 'will_paginate'
gem 'bootstrap-will_paginate', '0.0.6'

gem 'pg', '0.12.2'
gem 'pg_search'

group :development, :test do
  gem 'sqlite3', '1.3.5'
  gem 'rspec-rails', '2.10.0'
  gem 'guard-rspec', '0.5.5'
end

group :development do
  gem 'sqlite3', '1.3.5'
  gem 'rspec-rails', '2.10.0'
end

# Test gems on Macintosh OS X
group :test do
  gem 'rspec-rails', '2.10.0'
end

group :production do
  gem 'pg', '0.12.2'
  gem 'rack-google_analytics'
end

Answer 1

您正在重复将sqlite放入开发组：

group :development, :test do
  gem 'sqlite3', '1.3.5'
  gem 'rspec-rails', '2.10.0'
  gem 'guard-rspec', '0.5.5'
end

group :development do
  gem 'sqlite3', '1.3.5'
  gem 'rspec-rails', '2.10.0'
end

您可以在此处删除您的第二个开发组列表，因为它没有添加任何内容 - 您已经在第一个语句中将它们放入开发和测试中。同样地，通过将pg放在任何组之外，它可以在所有组中使用，因此将其添加到生产中是一个重复的列表。

重写宝石文件可能是：

gem 'rails', '3.2.11'
gem "bootstrap-sass"
gem 'will_paginate'
gem 'bootstrap-will_paginate', '0.0.6'

# gem 'pg', '0.12.2'
gem 'pg_search'

group :development, :test do
  gem 'sqlite3', '1.3.5'
  gem 'rspec-rails', '2.10.0'
end

group :test do
  gem 'guard-rspec', '0.5.5'
end

group :production do
  gem 'pg', '0.12.2'
  gem 'rack-google_analytics'
end

另外，一个感受到痛苦的人的一个友好提示：尝试在开发中使用相同的db作为生产。我知道最初在本地设置postgres可能会很棘手，但是一旦它在那里它就会坚如磐石并且非常容易使用。由于PG和SQLite实现之间的差异（例如，在字段iirc中搜索文本），您将面临更少的错误风险。

没有sqlite：

gem 'rails', '3.2.11'
gem "bootstrap-sass"
gem 'will_paginate'
gem 'bootstrap-will_paginate', '0.0.6'

gem 'pg', '0.12.2'
gem 'pg_search'

group :development, :test do
  gem 'rspec-rails', '2.10.0'
end

group :test do
  gem 'guard-rspec', '0.5.5'
end

group :production do
  gem 'rack-google_analytics'
end

Answer 2

如果你在所有环境中使用pg而不是删除sqlite3 gem。

之间的区别：开发与发展：开发，：测试是：开发，：测试是针对需要包含在这两种环境中的宝石。：开发是为了：开发唯一的宝石。

Answer 3

你有宝石sqlite3，pg，respec-rails多一次在相同的环境中，你需要删除相同的宝石的重复。

按如下方式编辑您的gem文件：

gem 'rails', '3.2.11'
gem "bootstrap-sass"
gem 'will_paginate'
gem 'bootstrap-will_paginate', '0.0.6'


group :development, :test do
  gem 'sqlite3', '1.3.5'
  gem 'rspec-rails', '2.10.0'
  gem 'guard-rspec', '0.5.5'
end


group :production do
  gem 'pg', '0.12.2'
end

你的Gemfile不止一次列出了gem。可能会导致错误

3 个答案: