当我尝试运行时， heroku run rake db:migrate出现此错误：
can't activate bcrypt-ruby (~> 3.0.0), already activated bcrypt-ruby-3.1.2. Make sure all dependencies are added to Gemfile.
我已经更新了我的 Gemfile 并指定了 bcrypt 的版本，但没有奏效。一切都在正确的分支上。
宝石文件：
source 'https://rubygems.org'
ruby '2.0.0'
#ruby-gemset=railstutorial_rails_4_0
gem 'rails', '4.0.0'
gem 'sass-rails', '4.0.1'
gem 'uglifier', '2.1.1'
gem 'coffee-rails', '4.0.1'
gem 'jquery-rails', '3.0.4'
gem 'turbolinks', '1.1.1'
gem 'jbuilder', '1.0.2'
gem 'bootstrap-sass', github: 'thomas-mcdonald/bootstrap-sass', branch: '3'
gem 'bcrypt-ruby', '~> 3.1.2'
group :development, :test do
gem 'sqlite3', '1.3.8'
gem 'rspec-rails', '2.13.1'
end
group :test do
gem 'selenium-webdriver', '2.35.1'
gem 'capybara', '2.1.0'
gem 'factory_girl_rails', '4.2.1'
end
group :doc do
gem 'sdoc', '0.3.20', require: false
end
group :production do
gem 'pg', '0.15.1'
gem 'rails_12factor', '0.0.2'
end
Gemfile.lock:
GIT
remote: git://github.com/thomas-mcdonald/bootstrap-sass.git
revision: 9c6c07f74ff515cf38380b014cfede14a4f0eae4
branch: 3
specs:
bootstrap-sass (3.0.0.0)
sass (~> 3.2)
GEM
remote: https://rubygems.org/
specs:
actionmailer (4.0.0)
actionpack (= 4.0.0)
mail (~> 2.5.3)
actionpack (4.0.0)
activesupport (= 4.0.0)
builder (~> 3.1.0)
erubis (~> 2.7.0)
rack (~> 1.5.2)
rack-test (~> 0.6.2)
activemodel (4.0.0)
activesupport (= 4.0.0)
builder (~> 3.1.0)
activerecord (4.0.0)
activemodel (= 4.0.0)
activerecord-deprecated_finders (~> 1.0.2)
activesupport (= 4.0.0)
arel (~> 4.0.0)
activerecord-deprecated_finders (1.0.3)
activesupport (4.0.0)
i18n (~> 0.6, >= 0.6.4)
minitest (~> 4.2)
multi_json (~> 1.3)
thread_safe (~> 0.1)
tzinfo (~> 0.3.37)
arel (4.0.1)
atomic (1.1.14)
bcrypt-ruby (3.1.2-x86-mingw32)
builder (3.1.4)
capybara (2.1.0)
mime-types (>= 1.16)
nokogiri (>= 1.3.3)
rack (>= 1.0.0)
rack-test (>= 0.5.4)
xpath (~> 2.0)
childprocess (0.3.9)
ffi (~> 1.0, >= 1.0.11)
coffee-rails (4.0.1)
coffee-script (>= 2.2.0)
railties (>= 4.0.0, < 5.0)
coffee-script (2.2.0)
coffee-script-source
execjs
coffee-script-source (1.6.3)
diff-lcs (1.2.5)
erubis (2.7.0)
execjs (2.0.2)
factory_girl (4.2.0)
activesupport (>= 3.0.0)
factory_girl_rails (4.2.1)
factory_girl (~> 4.2.0)
railties (>= 3.0.0)
ffi (1.9.3-x86-mingw32)
hike (1.2.3)
i18n (0.6.5)
jbuilder (1.0.2)
activesupport (>= 3.0.0)
jquery-rails (3.0.4)
railties (>= 3.0, < 5.0)
thor (>= 0.14, < 2.0)
json (1.8.1)
mail (2.5.4)
mime-types (~> 1.16)
treetop (~> 1.4.8)
mime-types (1.25)
mini_portile (0.5.2)
minitest (4.7.5)
multi_json (1.8.2)
nokogiri (1.6.0-x86-mingw32)
mini_portile (~> 0.5.0)
pg (0.15.1-x86-mingw32)
polyglot (0.3.3)
rack (1.5.2)
rack-test (0.6.2)
rack (>= 1.0)
rails (4.0.0)
actionmailer (= 4.0.0)
actionpack (= 4.0.0)
activerecord (= 4.0.0)
activesupport (= 4.0.0)
bundler (>= 1.3.0, < 2.0)
railties (= 4.0.0)
sprockets-rails (~> 2.0.0)
rails_12factor (0.0.2)
rails_serve_static_assets
rails_stdout_logging
rails_serve_static_assets (0.0.1)
rails_stdout_logging (0.0.3)
railties (4.0.0)
actionpack (= 4.0.0)
activesupport (= 4.0.0)
rake (>= 0.8.7)
thor (>= 0.18.1, < 2.0)
rake (10.1.0)
rdoc (3.12.2)
json (~> 1.4)
rspec-core (2.13.1)
rspec-expectations (2.13.0)
diff-lcs (>= 1.1.3, < 2.0)
rspec-mocks (2.13.1)
rspec-rails (2.13.1)
actionpack (>= 3.0)
activesupport (>= 3.0)
railties (>= 3.0)
rspec-core (~> 2.13.0)
rspec-expectations (~> 2.13.0)
rspec-mocks (~> 2.13.0)
rubyzip (0.9.9)
sass (3.2.12)
sass-rails (4.0.1)
railties (>= 4.0.0, < 5.0)
sass (>= 3.1.10)
sprockets-rails (~> 2.0.0)
sdoc (0.3.20)
json (>= 1.1.3)
rdoc (~> 3.10)
selenium-webdriver (2.35.1)
childprocess (>= 0.2.5)
multi_json (~> 1.0)
rubyzip (< 1.0.0)
websocket (~> 1.0.4)
sprockets (2.10.0)
hike (~> 1.2)
multi_json (~> 1.0)
rack (~> 1.0)
tilt (~> 1.1, != 1.3.0)
sprockets-rails (2.0.1)
actionpack (>= 3.0)
activesupport (>= 3.0)
sprockets (~> 2.8)
sqlite3 (1.3.8-x86-mingw32)
thor (0.18.1)
thread_safe (0.1.3)
atomic
tilt (1.4.1)
treetop (1.4.15)
polyglot
polyglot (>= 0.3.1)
turbolinks (1.1.1)
coffee-rails
tzinfo (0.3.38)
uglifier (2.1.1)
execjs (>= 0.3.0)
multi_json (~> 1.0, >= 1.0.2)
websocket (1.0.7)
xpath (2.0.0)
nokogiri (~> 1.3)
PLATFORMS
x86-mingw32
DEPENDENCIES
bcrypt-ruby (~> 3.1.2)
bootstrap-sass!
capybara (= 2.1.0)
coffee-rails (= 4.0.1)
factory_girl_rails (= 4.2.1)
jbuilder (= 1.0.2)
jquery-rails (= 3.0.4)
pg (= 0.15.1)
rails (= 4.0.0)
rails_12factor (= 0.0.2)
rspec-rails (= 2.13.1)
sass-rails (= 4.0.1)
sdoc (= 0.3.20)
selenium-webdriver (= 2.35.1)
sqlite3 (= 1.3.8)
turbolinks (= 1.1.1)
uglifier (= 2.1.1)
这是一些无用的文本，因为堆栈溢出不会让我发布少量文本。