当我尝试从4.2.1-> 4.2.5更新我的宝石以及Rails时，Rails决定给我一个错误：
Sass::SyntaxError (Undefined variable: "$btn-default-color".):
app/uploaders/avatar_uploader.rb:26:in `default_url'
app/controllers/dashboards_controller.rb:79:in `block in dashboard'
app/controllers/dashboards_controller.rb:68:in `dashboard'
我不明白在升级之前它是否正常工作。
我在源代码中跟踪了这一行，它似乎源于：
# Provide a default URL as a default if there hasn't been a file uploaded:
def default_url
# For Rails 3.1+ asset pipeline compatibility:
ActionController::Base.helpers.asset_path("avatar/" + [version_name, "default.gif"].compact.join('_'))
end
这是来自gem carrierwave的代码，而afaik，这行代码与bootstrap无关。
我尝试评论该行，但undefined variable $btn-default-color只是弹出另一行代码。
我不太确定究竟是什么导致了这个问题。 $btn-default-color似乎是bootstrap的sass变量，但我看不到代码是如何相关的。
我不确定如何将我的宝石还原到以前的版本，因为我的GEMFILE中没有精确的宝石版本。
这是我的GEMFILE
source 'https://rubygems.org'
############## Non-default gems
# COMPULSORY to run on Windows
gem 'tzinfo-data'
# some nice GUI components
gem 'bootstrap-sass', '~> 3.3.4'
# add-on to bootstrap; even nicer GUI components
gem 'flat-ui-sass', '~> 2.1.3'
# rename gem (allows you to rename JUST THE APPLICATION NAME with ease)
gem 'rename', '~> 1.0.2'
# login/logout, email confirmation, etc. for tutors/students
gem 'devise', '~> 3.5.1'
# allow image/attachment/file uploads
gem 'carrierwave', '~> 0.10.0'
# handle image resizing for carrierwave
gem 'mini_magick', '~> 4.2.7'
# calendar gem
gem 'fullcalendar-rails', '~> 2.3.1.0'
# required for calendar gem (time and date formatter)
gem 'momentjs-rails', '~> 2.10.3'
# Bootstrap date and time picker UI element
gem 'bootstrap3-datetimepicker-rails', '~> 4.15.35'
# enable jquery ui (e.g. tooltips and datepicker)
gem 'jquery-ui-rails', '~> 5.0.5'
# search functionality for ActiveRecord
gem 'ransack', '~> 1.6.6'
# pagination for tutor_profiles#index
gem 'will_paginate', '~> 3.0.6'
# enable custom configuration/styling of select elements
gem 'select2-rails', '~> 3.5.9.3'
# enable tagsinput UI element
gem 'bootstrap-tagsinput-rails', '~> 0.4.2.1'
# enable typeahead for tagsinput UI element
gem 'twitter-typeahead-rails', '~> 0.11.1'
# distance computation and coordinate conversion
gem 'geocoder', '~> 1.2.9'
# Payment system
gem 'braintree'
# Handle ENV variables to keep secret keys away from version control
gem 'figaro', '~> 1.1.1'
# Allow passing of variables from rails to JS
gem 'gon', '~> 5.2.3'
#Mailboxer for instant messaging
gem 'mailboxer'
# Calculate distance between 2 geocoordinates using Haversine formula
gem 'haversine', '~> 0.3.0'
# Websockets for duplex real-time communication (chat, notifs)
gem 'websocket-rails'
# Resque for ActiveJob (automates and queues emails)
gem 'resque'
gem 'resque-scheduler'
############## Default gems
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.2.1'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
gem 'therubyracer', platforms: :ruby
# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0', group: :doc
# Use ActiveModel has_secure_password
gem 'bcrypt', '~> 3.1.7'
# AngularJS
gem 'angularjs-rails'
# Fontawesome (includes glyphs)
gem 'font-awesome-sass'
# Use Unicorn as the app server
# gem 'unicorn'
# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development
group :development, :test do
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug'
# Access an IRB console on exception pages or by using <%= console %> in views
gem 'web-console', '~> 2.0'
# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring'
#Entity Relationship Diagram, generates visual representation of models
gem "rails-erd"
# Auto task/rule runner (for livereload for example)
gem 'guard'
# Enables live reload of view files
gem 'guard-livereload', '~> 2.4', require: false
# Add middleware to enable live reload
gem "rack-livereload"
# Format print out of database in rails console
# do:
# require 'hirb'
# Hirb.enable
# in rails console
gem 'hirb'
end
这是我的gemfile.lock
GEM
remote: https://rubygems.org/
specs:
actionmailer (4.2.1)
actionpack (= 4.2.1)
actionview (= 4.2.1)
activejob (= 4.2.1)
mail (~> 2.5, >= 2.5.4)
rails-dom-testing (~> 1.0, >= 1.0.5)
actionpack (4.2.1)
actionview (= 4.2.1)
activesupport (= 4.2.1)
rack (~> 1.6)
rack-test (~> 0.6.2)
rails-dom-testing (~> 1.0, >= 1.0.5)
rails-html-sanitizer (~> 1.0, >= 1.0.1)
actionview (4.2.1)
activesupport (= 4.2.1)
builder (~> 3.1)
erubis (~> 2.7.0)
rails-dom-testing (~> 1.0, >= 1.0.5)
rails-html-sanitizer (~> 1.0, >= 1.0.1)
activejob (4.2.1)
activesupport (= 4.2.1)
globalid (>= 0.3.0)
activemodel (4.2.1)
activesupport (= 4.2.1)
builder (~> 3.1)
activerecord (4.2.1)
activemodel (= 4.2.1)
activesupport (= 4.2.1)
arel (~> 6.0)
activesupport (4.2.1)
i18n (~> 0.7)
json (~> 1.7, >= 1.7.7)
minitest (~> 5.1)
thread_safe (~> 0.3, >= 0.3.4)
tzinfo (~> 1.1)
angularjs-rails (1.4.8)
arel (6.0.3)
autoprefixer-rails (6.2.3)
execjs
json
bcrypt (3.1.10)
binding_of_caller (0.7.2)
debug_inspector (>= 0.0.1)
bootstrap-sass (3.3.6)
autoprefixer-rails (>= 5.2.1)
sass (>= 3.3.4)
bootstrap-tagsinput-rails (0.4.2.1)
railties (>= 3.1)
bootstrap3-datetimepicker-rails (4.15.35)
momentjs-rails (>= 2.8.1)
braintree (2.56.0)
builder (>= 2.0.0)
builder (3.2.2)
byebug (8.2.1)
carrierwave (0.10.0)
activemodel (>= 3.2.0)
activesupport (>= 3.2.0)
json (>= 1.7)
mime-types (>= 1.16)
choice (0.2.0)
coderay (1.1.0)
coffee-rails (4.1.1)
coffee-script (>= 2.2.0)
railties (>= 4.0.0, < 5.1.x)
coffee-script (2.4.1)
coffee-script-source
execjs
coffee-script-source (1.10.0)
concurrent-ruby (1.0.0)
daemons (1.2.3)
debug_inspector (0.0.2)
devise (3.5.3)
bcrypt (~> 3.0)
orm_adapter (~> 0.1)
railties (>= 3.2.6, < 5)
responders
thread_safe (~> 0.1)
warden (~> 1.2.3)
em-synchrony (1.0.4)
eventmachine (>= 1.0.0.beta.1)
em-websocket (0.5.1)
eventmachine (>= 0.12.9)
http_parser.rb (~> 0.6.0)
erubis (2.7.0)
eventmachine (1.0.8)
execjs (2.6.0)
faye-websocket (0.10.2)
eventmachine (>= 0.12.0)
websocket-driver (>= 0.5.1)
ffi (1.9.10)
figaro (1.1.1)
thor (~> 0.14)
flat-ui-sass (2.1.3)
bootstrap-sass (>= 3.1)
sass (>= 3.2.0)
font-awesome-sass (4.5.0)
sass (>= 3.2)
foreigner (1.7.4)
activerecord (>= 3.0.0)
formatador (0.2.5)
fullcalendar-rails (2.3.1.0)
jquery-rails (>= 3.1.1, < 5.0.0)
momentjs-rails (~> 2.8, >= 2.8.4)
geocoder (1.2.14)
globalid (0.3.6)
activesupport (>= 4.1.0)
gon (5.2.3)
actionpack (>= 2.3.0)
json
multi_json
request_store (>= 1.0.5)
guard (2.13.0)
formatador (>= 0.2.4)
listen (>= 2.7, <= 4.0)
lumberjack (~> 1.0)
nenv (~> 0.1)
notiffany (~> 0.0)
pry (>= 0.9.12)
shellany (~> 0.0)
thor (>= 0.18.1)
guard-compat (1.2.1)
guard-livereload (2.5.1)
em-websocket (~> 0.5)
guard (~> 2.8)
guard-compat (~> 1.0)
multi_json (~> 1.8)
haversine (0.3.0)
hirb (0.7.3)
hiredis (0.6.1)
http_parser.rb (0.6.0)
i18n (0.7.0)
jbuilder (2.4.0)
activesupport (>= 3.0.0, < 5.1)
multi_json (~> 1.2)
jquery-rails (4.0.5)
rails-dom-testing (~> 1.0)
railties (>= 4.2.0)
thor (>= 0.14, < 2.0)
jquery-ui-rails (5.0.5)
railties (>= 3.2.16)
json (1.8.3)
libv8 (3.16.14.13)
listen (3.0.5)
rb-fsevent (>= 0.9.3)
rb-inotify (>= 0.9)
loofah (2.0.3)
nokogiri (>= 1.5.9)
lumberjack (1.0.10)
mail (2.6.3)
mime-types (>= 1.16, < 3)
mailboxer (0.13.0)
carrierwave (>= 0.5.8)
foreigner (>= 0.9.1)
rails (>= 3.2.0)
method_source (0.8.2)
mime-types (2.99)
mini_magick (4.2.10)
mini_portile2 (2.0.0)
minitest (5.8.3)
momentjs-rails (2.10.6)
railties (>= 3.1)
mono_logger (1.1.0)
multi_json (1.11.2)
nenv (0.2.0)
nokogiri (1.6.7.1)
mini_portile2 (~> 2.0.0.rc2)
notiffany (0.0.8)
nenv (~> 0.1)
shellany (~> 0.0)
orm_adapter (0.5.0)
polyamorous (1.3.0)
activerecord (>= 3.0)
pry (0.10.3)
coderay (~> 1.1.0)
method_source (~> 0.8.1)
slop (~> 3.4)
rack (1.6.4)
rack-livereload (0.3.16)
rack
rack-protection (1.5.3)
rack
rack-test (0.6.3)
rack (>= 1.0)
rails (4.2.1)
actionmailer (= 4.2.1)
actionpack (= 4.2.1)
actionview (= 4.2.1)
activejob (= 4.2.1)
activemodel (= 4.2.1)
activerecord (= 4.2.1)
activesupport (= 4.2.1)
bundler (>= 1.3.0, < 2.0)
railties (= 4.2.1)
sprockets-rails
rails-deprecated_sanitizer (1.0.3)
activesupport (>= 4.2.0.alpha)
rails-dom-testing (1.0.7)
activesupport (>= 4.2.0.beta, < 5.0)
nokogiri (~> 1.6.0)
rails-deprecated_sanitizer (>= 1.0.1)
rails-erd (1.4.4)
activerecord (>= 3.2)
activesupport (>= 3.2)
choice (~> 0.2.0)
ruby-graphviz (~> 1.2)
rails-html-sanitizer (1.0.2)
loofah (~> 2.0)
railties (4.2.1)
actionpack (= 4.2.1)
activesupport (= 4.2.1)
rake (>= 0.8.7)
thor (>= 0.18.1, < 2.0)
rake (10.4.2)
ransack (1.6.6)
actionpack (>= 3.0)
activerecord (>= 3.0)
activesupport (>= 3.0)
i18n
polyamorous (~> 1.2)
rb-fsevent (0.9.7)
rb-inotify (0.9.5)
ffi (>= 0.5.0)
rdoc (4.2.1)
json (~> 1.4)
redis (3.2.2)
redis-namespace (1.5.2)
redis (~> 3.0, >= 3.0.4)
redis-objects (1.2.1)
redis (>= 3.0.2)
ref (2.0.0)
rename (1.0.2)
rails (>= 3.0.0)
request_store (1.2.1)
responders (2.1.1)
railties (>= 4.2.0, < 5.1)
resque (1.25.2)
mono_logger (~> 1.0)
multi_json (~> 1.0)
redis-namespace (~> 1.3)
sinatra (>= 0.9.2)
vegas (~> 0.1.2)
resque-scheduler (4.0.0)
mono_logger (~> 1.0)
redis (~> 3.0)
resque (~> 1.25)
rufus-scheduler (~> 3.0)
ruby-graphviz (1.2.2)
rufus-scheduler (3.2.0)
sass (3.4.20)
sass-rails (5.0.4)
railties (>= 4.0.0, < 5.0)
sass (~> 3.1)
sprockets (>= 2.8, < 4.0)
sprockets-rails (>= 2.0, < 4.0)
tilt (>= 1.1, < 3)
sdoc (0.4.1)
json (~> 1.7, >= 1.7.7)
rdoc (~> 4.0)
select2-rails (3.5.9.3)
thor (~> 0.14)
shellany (0.0.1)
sinatra (1.4.6)
rack (~> 1.4)
rack-protection (~> 1.4)
tilt (>= 1.3, < 3)
slop (3.6.0)
spring (1.6.1)
sprockets (3.5.2)
concurrent-ruby (~> 1.0)
rack (> 1, < 3)
sprockets-rails (3.0.0)
actionpack (>= 4.0)
activesupport (>= 4.0)
sprockets (>= 3.0.0)
sqlite3 (1.3.11)
therubyracer (0.12.2)
libv8 (~> 3.16.14.0)
ref
thin (1.6.4)
daemons (~> 1.0, >= 1.0.9)
eventmachine (~> 1.0, >= 1.0.4)
rack (~> 1.0)
thor (0.19.1)
thread_safe (0.3.5)
tilt (2.0.1)
turbolinks (2.5.3)
coffee-rails
twitter-typeahead-rails (0.11.1)
actionpack (>= 3.1)
jquery-rails
railties (>= 3.1)
tzinfo (1.2.2)
thread_safe (~> 0.1)
tzinfo-data (1.2015.7)
tzinfo (>= 1.0.0)
uglifier (2.7.2)
execjs (>= 0.3.0)
json (>= 1.8.0)
vegas (0.1.11)
rack (>= 1.0.0)
warden (1.2.4)
rack (>= 1.0)
web-console (2.2.1)
activemodel (>= 4.0)
binding_of_caller (>= 0.7.2)
railties (>= 4.0)
sprockets-rails (>= 2.0, < 4.0)
websocket-driver (0.6.3)
websocket-extensions (>= 0.1.0)
websocket-extensions (0.1.2)
websocket-rails (0.7.0)
em-synchrony
faye-websocket
hiredis
rack
rails
redis
redis-objects
thin
will_paginate (3.0.7)
PLATFORMS
ruby
DEPENDENCIES
angularjs-rails
bcrypt (~> 3.1.7)
bootstrap-sass (~> 3.3.4)
bootstrap-tagsinput-rails (~> 0.4.2.1)
bootstrap3-datetimepicker-rails (~> 4.15.35)
braintree
byebug
carrierwave (~> 0.10.0)
coffee-rails (~> 4.1.0)
devise (~> 3.5.1)
figaro (~> 1.1.1)
flat-ui-sass (~> 2.1.3)
font-awesome-sass
fullcalendar-rails (~> 2.3.1.0)
geocoder (~> 1.2.9)
gon (~> 5.2.3)
guard
guard-livereload (~> 2.4)
haversine (~> 0.3.0)
hirb
jbuilder (~> 2.0)
jquery-rails
jquery-ui-rails (~> 5.0.5)
mailboxer
mini_magick (~> 4.2.7)
momentjs-rails (~> 2.10.3)
rack-livereload
rails (= 4.2.1)
rails-erd
ransack (~> 1.6.6)
rename (~> 1.0.2)
resque
resque-scheduler
sass-rails (~> 5.0)
sdoc (~> 0.4.0)
select2-rails (~> 3.5.9.3)
spring
sqlite3
therubyracer
turbolinks
twitter-typeahead-rails (~> 0.11.1)
tzinfo-data
uglifier (>= 1.3.0)
web-console (~> 2.0)
websocket-rails
will_paginate (~> 3.0.6)
BUNDLED WITH
1.10.6
答案 0 :(得分：0)
我仍然不知道更新我的宝石如何触发这个，但显然我忘了删除这一行（我不再使用flat-ui）
config.assets.precompile += ['flat-ui/**/*']
在我的application.rb文件中。
通配符显然与导致问题的部分匹配rails bootstrap-sass assets compilation error - undefined variable alert-padding