为什么捆绑器无法解决与预发布版本的依赖关系？
Why bundler can't resolve dependencies with prerelease versions?
这样：
source 'https://rubygems.org'
gem 'rspec-rails', '~> 3.5.0.beta'
gem 'json_spec'
没用：
Bundler could not find compatible versions for gem "rspec-core":
In Gemfile:
json_spec was resolved to 0.1.0, which depends on
rspec (~> 2.0) was resolved to 2.0.0, which depends on
rspec-core (= 2.0.0)
rspec-rails (~> 3.5.0.beta) was resolved to 3.5.0.beta1, which depends on
rspec-core (= 3.5.0.beta1)
这样：
source 'https://rubygems.org'
gem 'rspec-rails', '~> 3.5.0.beta'
gem 'rspec', '~> 3.5.0.beta'
gem 'json_spec'
有效。为什么会这样？
This is deliberate. Rubygems explicitly excludes prereleases unless the version requirement has an alphabetical number in it. So your version requirements, as stated, are actually in conflict. If you want a prerelease, use '>= 2.2a'.
我知道预发行版本是多么复杂，我要说的可能会导致问题，但我预计“>=2.2”的意思是 a)“任何 2.2 或更高版本的版本”和 b)“不要”我的帐户无法获得预发布版本，但如果其他 gem 想要一个，只要高于 2.2"，我愿意。好像只有(a)的意思。
当依赖项不在我的 Gemfile 中而是在我使用的 gem 中并且我无法将版本更改为“>=2.2a”时，问题变得更加困难。
这样：
source 'https://rubygems.org'
gem 'rspec-rails', '~> 3.5.0.beta'
gem 'json_spec'
没用：
Bundler could not find compatible versions for gem "rspec-core":
In Gemfile:
json_spec was resolved to 0.1.0, which depends on
rspec (~> 2.0) was resolved to 2.0.0, which depends on
rspec-core (= 2.0.0)
rspec-rails (~> 3.5.0.beta) was resolved to 3.5.0.beta1, which depends on
rspec-core (= 3.5.0.beta1)
这样：
source 'https://rubygems.org'
gem 'rspec-rails', '~> 3.5.0.beta'
gem 'rspec', '~> 3.5.0.beta'
gem 'json_spec'
有效。为什么会这样？
This is deliberate. Rubygems explicitly excludes prereleases unless the version requirement has an alphabetical number in it. So your version requirements, as stated, are actually in conflict. If you want a prerelease, use '>= 2.2a'.
我知道预发行版本是多么复杂，我要说的可能会导致问题，但我预计“>=2.2”的意思是 a)“任何 2.2 或更高版本的版本”和 b)“不要”我的帐户无法获得预发布版本，但如果其他 gem 想要一个，只要高于 2.2"，我愿意。好像只有(a)的意思。
当依赖项不在我的 Gemfile 中而是在我使用的 gem 中并且我无法将版本更改为“>=2.2a”时，问题变得更加困难。