Trouble parsing bundler's conflict output mess

问题:

I'm getting

Bundler could not find compatible versions for gem "railties":
  In Gemfile:
  some_gem was resolved to 0.0.1, which depends on
    devise (>= 3.2.4, < 4.0.0) was resolved to 3.5.10, which depends on
      railties (>= 3.2.6, < 5)

  some_gem was resolved to 0.0.1, which depends on
    rails (~> 4.0.13) was resolved to 4.0.13, which depends on
      railties (= 4.0.13)

  rspec-rails (~> 3.8) was resolved to 3.8.2, which depends on
    railties (>= 3.0)

Doesn't railties = 4.0.13 satisfy all 3 railties version conditions?

回答1:

At least, Devise requires railties (">= 4.1.0", "< 6.0"), as you can see here. https://raw.githubusercontent.com/plataformatec/devise/master/devise.gemspec

So you can try specifying the version in your Gemfile: gem 'railties', '~> 4.1.0'