rails中的语义版本控制:被认为大于5.2的是6.1.0.alpha

Question

这里有什么问题? 6.1.0.alpha大于5.2，所以我不知道为什么我的捆绑包/构建在travis ci上失败。

Bundler could not find compatible versions for gem "activemodel":
  In Gemfile:
    rails was resolved to 6.1.0.alpha, which depends on
      activemodel (= 6.1.0.alpha)
    web-console was resolved to 3.7.0, which depends on
      activemodel (>= 5.2)

Answer 1

你可以这样检查它：

Gem::Version.new('6.1.0.alpha') >= Gem::Version.new('5.2') # => true
Gem::Requirement.new(">= 5.2").satisfied_by?(Gem::Version.new('6.1.0.alpha')) # => true

Bundler倾向于输出它无法匹配的gem的所有版本要求，即使是那些满足的gem，很可能还有另一个gem具有不匹配的要求。