编辑12-21-16：
使用rails generate或destroy时，错误类型为：
Expected string default value for '--jbuilder'; got true (boolean)
Expected string default value for '--helper'; got true (boolean)
Expected string default value for '--assets'; got true (boolean)
rails g --help也会发生这种情况。输出可能是提供信息的：
C:\Sites\freshApp> rails g --help
Expected string default value for '--jbuilder'; got true (boolean)
Usage: rails generate GENERATOR [args] [options]
General options:
-h, [--help] # Print generator's options and usage
-p, [--pretend] # Run but do not make any changes
-f, [--force] # Overwrite files that already exist
-s, [--skip] # Skip files that already exist
-q, [--quiet] # Suppress status output
Please choose a generator below.
Expected string default value for '--helper'; got true (boolean)
Expected string default value for '--assets'; got true (boolean)
Rails:
assets
channel
controller
generator
helper
integration_test
jbuilder
job
mailer
migration
model
resource
scaffold
scaffold_controller
task
Coffee:
coffee:assets
Js:
js:assets
TestUnit:
test_unit:generator
test_unit:plugin
我还没有注意到我的应用程序有任何问题。我在新的Windows和Ubuntu环境中看到过它。稍后将使用我的Ubuntu环境（类似）进行更新。
Ruby： ruby 2.3.3p222 (2016-11-21 revision 56859) [x64-mingw32]
RubyDevKit： DevKit-mingw64-64-4.7.2-20130224-1432-sfx
Gemfile.lock的：
GEM
remote: https://rubygems.org/
specs:
actioncable (5.0.1)
actionpack (= 5.0.1)
nio4r (~> 1.2)
websocket-driver (~> 0.6.1)
actionmailer (5.0.1)
actionpack (= 5.0.1)
actionview (= 5.0.1)
activejob (= 5.0.1)
mail (~> 2.5, >= 2.5.4)
rails-dom-testing (~> 2.0)
actionpack (5.0.1)
actionview (= 5.0.1)
activesupport (= 5.0.1)
rack (~> 2.0)
rack-test (~> 0.6.3)
rails-dom-testing (~> 2.0)
rails-html-sanitizer (~> 1.0, >= 1.0.2)
actionview (5.0.1)
activesupport (= 5.0.1)
builder (~> 3.1)
erubis (~> 2.7.0)
rails-dom-testing (~> 2.0)
rails-html-sanitizer (~> 1.0, >= 1.0.2)
activejob (5.0.1)
activesupport (= 5.0.1)
globalid (>= 0.3.6)
activemodel (5.0.1)
activesupport (= 5.0.1)
activerecord (5.0.1)
activemodel (= 5.0.1)
activesupport (= 5.0.1)
arel (~> 7.0)
activesupport (5.0.1)
concurrent-ruby (~> 1.0, >= 1.0.2)
i18n (~> 0.7)
minitest (~> 5.1)
tzinfo (~> 1.1)
arel (7.1.4)
builder (3.2.2)
coffee-rails (4.2.1)
coffee-script (>= 2.2.0)
railties (>= 4.0.0, < 5.2.x)
coffee-script (2.4.1)
coffee-script-source
execjs
coffee-script-source (1.12.2)
concurrent-ruby (1.0.3)
debug_inspector (0.0.2)
erubis (2.7.0)
execjs (2.7.0)
globalid (0.3.7)
activesupport (>= 4.1.0)
i18n (0.7.0)
jbuilder (2.6.1)
activesupport (>= 3.0.0, < 5.1)
multi_json (~> 1.2)
jquery-rails (4.2.1)
rails-dom-testing (>= 1, < 3)
railties (>= 4.2.0)
thor (>= 0.14, < 2.0)
loofah (2.0.3)
nokogiri (>= 1.5.9)
mail (2.6.4)
mime-types (>= 1.16, < 4)
materialize-sass (0.97.8)
sass (~> 3.3)
method_source (0.8.2)
mime-types (3.1)
mime-types-data (~> 3.2015)
mime-types-data (3.2016.0521)
mini_portile2 (2.1.0)
minitest (5.10.1)
multi_json (1.12.1)
nio4r (1.2.1)
nokogiri (1.6.8.1-x64-mingw32)
mini_portile2 (~> 2.1.0)
puma (3.6.2)
rack (2.0.1)
rack-test (0.6.3)
rack (>= 1.0)
rails (5.0.1)
actioncable (= 5.0.1)
actionmailer (= 5.0.1)
actionpack (= 5.0.1)
actionview (= 5.0.1)
activejob (= 5.0.1)
activemodel (= 5.0.1)
activerecord (= 5.0.1)
activesupport (= 5.0.1)
bundler (>= 1.3.0, < 2.0)
railties (= 5.0.1)
sprockets-rails (>= 2.0.0)
rails-dom-testing (2.0.1)
activesupport (>= 4.2.0, < 6.0)
nokogiri (~> 1.6.0)
rails-html-sanitizer (1.0.3)
loofah (~> 2.0)
railties (5.0.1)
actionpack (= 5.0.1)
activesupport (= 5.0.1)
method_source
rake (>= 0.8.7)
thor (>= 0.18.1, < 2.0)
rake (12.0.0)
sass (3.4.23)
sass-rails (5.0.6)
railties (>= 4.0.0, < 6)
sass (~> 3.1)
sprockets (>= 2.8, < 4.0)
sprockets-rails (>= 2.0, < 4.0)
tilt (>= 1.1, < 3)
sprockets (3.7.1)
concurrent-ruby (~> 1.0)
rack (> 1, < 3)
sprockets-rails (3.2.0)
actionpack (>= 4.0)
activesupport (>= 4.0)
sprockets (>= 3.0.0)
sqlite3 (1.3.12-x64-mingw32)
thor (0.19.4)
thread_safe (0.3.5)
tilt (2.0.5)
turbolinks (5.0.1)
turbolinks-source (~> 5)
turbolinks-source (5.0.0)
tzinfo (1.2.2)
thread_safe (~> 0.1)
tzinfo-data (1.2016.10)
tzinfo (>= 1.0.0)
uglifier (3.0.4)
execjs (>= 0.3.0, < 3)
web-console (3.4.0)
actionview (>= 5.0)
activemodel (>= 5.0)
debug_inspector
railties (>= 5.0)
websocket-driver (0.6.4)
websocket-extensions (>= 0.1.0)
websocket-extensions (0.1.2)
PLATFORMS
x64-mingw32
DEPENDENCIES
byebug
coffee-rails (~> 4.2)
jbuilder (~> 2.5)
jquery-rails
materialize-sass
puma (~> 3.0)
rails (~> 5.0.0, >= 5.0.0.1)
sass-rails (~> 5.0)
sqlite3
turbolinks (~> 5)
tzinfo-data
uglifier (>= 1.3.0)
web-console
BUNDLED WITH
1.13.6
原始问题： 我正在
Expected string default value for '--helper'; got true (boolean)
Expected string default value for '--jbuilder'; got true (boolean)
使用下面的dockerfile在新安装的rails上运行“rails g scaffold Link”。现在已经过了一天，我搜索了警告，没有在谷歌上找到任何记录。我不记得过去曾遇到过这些问题（尽管我对rails和docker的经验并不是很大）。
FROM ruby:2.2.0
RUN apt-get update -qq && apt-get install -y build-essential
# for postgres
RUN apt-get install -y libpq-dev
# for nokogiri
RUN apt-get install -y libxml2-dev libxslt1-dev
# for capybara-webkit
RUN apt-get install -y libqt4-webkit libqt4-dev xvfb
# for a JS runtime
RUN apt-get install -y nodejs
RUN gem install rails -v 4.1.5
RUN gem install bundler
RUN rails new railsapp
RUN cd /railsapp/; rails g scaffold Link
我得到类似的错误没有“rails g controller test”