Rails如何处理gem依赖项

Question

用不相容的宝石解决问题有什么规则吗？

举个例子，我在添加gem 'google-cloud-speech'之后显示了当前存在的问题

我有错误：

Bundler could not find compatible versions for gem
"activesupport":   In Gemfile:
  gcloud_storage was resolved to 0.0.3, which depends on
    gcloud (= 0.7.2) was resolved to 0.7.2, which depends on
      google-api-client (~> 0.8.3) was resolved to 0.8.7, which depends on
        activesupport (< 5.0, >= 3.2)

  jbuilder (~> 2.5) was resolved to 2.7.0, which depends on
    activesupport (>= 4.2.0)

  jbuilder (~> 2.5) was resolved to 2.7.0, which depends on
    activesupport (>= 4.2.0)

  jbuilder (~> 2.5) was resolved to 2.7.0, which depends on
    activesupport (>= 4.2.0)

  rails (~> 5.1.6) was resolved to 5.1.6, which depends on
    activesupport (= 5.1.6)

  rails (~> 5.1.6) was resolved to 5.1.6, which depends on
    activesupport (= 5.1.6)

  rails (~> 5.1.6) was resolved to 5.1.6, which depends on
    activesupport (= 5.1.6)

  rails (~> 5.1.6) was resolved to 5.1.6, which depends on
    activesupport (= 5.1.6)

  rails (~> 5.1.6) was resolved to 5.1.6, which depends on
    activesupport (= 5.1.6)

  rails (~> 5.1.6) was resolved to 5.1.6, which depends on
    activesupport (= 5.1.6)

  rails (~> 5.1.6) was resolved to 5.1.6, which depends on
    activesupport (= 5.1.6)

  rails (~> 5.1.6) was resolved to 5.1.6, which depends on
    sprockets-rails (>= 2.0.0) was resolved to 3.2.1, which depends on
      activesupport (>= 4.0) Bundler could not find compatible versions for gem "faraday":   In Gemfile:
  gcloud_storage was resolved to 0.0.3, which depends on
    faraday (= 0.9.0)

  gcloud_storage was resolved to 0.0.3, which depends on
    gcloud (= 0.7.2) was resolved to 0.7.2, which depends on
      grpc (~> 0.13.1) was resolved to 0.13.1, which depends on
        googleauth (~> 0.5.1) was resolved to 0.5.2, which depends on
          faraday (~> 0.12) Bundler could not find compatible versions for gem "grpc":   In Gemfile:
  gcloud_storage was resolved to 0.0.3, which depends on
    gcloud (= 0.7.2) was resolved to 0.7.2, which depends on
      grpc (~> 0.13.1)

  google-cloud-speech was resolved to 0.20.0, which depends on
    grpc (~> 1.0)

Answer 1

您的gem尚未准备好用于rails 5.x，因为它需要激活端口(< 5.0，>= 3.2)，通常类似的内容在gems上说明(如果不再维护，则可能不会)