bundle satisfy 在语义上就正确了...

alias bs='bundle update'

哈...之前写 railsgirls 那网站的时候 我也遇到这个坑了...bundle update 之后好好的程序跑不了了，发现 slim 被降级掉 - -

If you run bundle update with no parameters, bundler will ignore any previously installed gems and resolve all dependencies again based on the latest versions of all gems available in the sources.

http://gembundler.com/v1.3/bundle_update.html

这咋回事。

To do this, run bundle update, which will ignore the Gemfile.lock, and resolve all the dependencies again. Keep in mind that this process can result in a significantly different set of the 25 gems, based on the requirements of new gems that the gem authors released since the last time you ran bundle update.

我觉得我没理解错啊，update 不是升级到满足依赖的最新版的意思吗？

表示中招 >_<

啊，这个坑我也掉进去过。以后 Gemfile 里面还是得写好版本号啊。

一般是跑完 bundle update 后有冲突或跑不过测试再去解决，此时再填上确切版本 (or git repo)，这样一直下来也没遇到多大问题啊...难道是自己用得 Gem 太少...