推送到 Heroku 时，使用命令“git push heroku master”出现以下错误：
预编译资产失败。Push 被拒绝，无法编译 Ruby/Rails 应用程序。
我正在努力寻找一种方法来纠正这个问题 - 有什么想法吗？
$ git push heroku master
Counting objects: 284, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (261/261), done.
Writing objects: 100% (284/284), 62.35 KiB | 0 bytes/s, done.
Total 284 (delta 100), reused 0 (delta 0)
-----> Ruby/Rails app detected
-----> Using Ruby version: ruby-2.0.0
-----> Installing dependencies using Bundler version 1.3.2
New app detected loading default bundler cache
Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin --deployment
Fetching gem metadata from https://rubygems.org/..........
Fetching gem metadata from https://rubygems.org/..
Fetching git://github.com/thomas-mcdonald/bootstrap-sass.git
Using rake (10.1.0)
Using i18n (0.6.5)
Using minitest (4.7.5)
Installing multi_json (1.8.2)
Using atomic (1.1.14)
Using thread_safe (0.1.3)
Installing tzinfo (0.3.38)
Using activesupport (4.0.0)
Using builder (3.1.4)
Using erubis (2.7.0)
Using rack (1.5.2)
Using rack-test (0.6.2)
Using actionpack (4.0.0)
Using mime-types (1.25)
Using polyglot (0.3.3)
Using treetop (1.4.15)
Using mail (2.5.4)
Using actionmailer (4.0.0)
Using activemodel (4.0.0)
Using activerecord-deprecated_finders (1.0.3)
Using arel (4.0.0)
Using activerecord (4.0.0)
Installing bcrypt-ruby (3.1.2)
Installing sass (3.2.12)
Using bootstrap-sass (3.0.0.0) from git://github.com/thomas-mcdonald/bootstrap-sass.git (at 3)
Using coffee-script-source (1.6.3)
Installing execjs (2.0.2)
Using coffee-script (2.2.0)
Using thor (0.18.1)
Using railties (4.0.0)
Installing coffee-rails (4.0.1)
Installing orm_adapter (0.4.0)
Installing warden (1.2.3)
Installing devise (3.1.1)
Using hike (1.2.3)
Installing jbuilder (1.5.2)
Using jquery-rails (3.0.4)
Installing json (1.8.1)
Using pg (0.17.0)
Using bundler (1.3.2)
Using tilt (1.4.1)
Using sprockets (2.10.0)
Installing sprockets-rails (2.0.1)
Using rails (4.0.0)
Using rails_serve_static_assets (0.0.1)
Installing rails_stdout_logging (0.0.3)
Using rails_12factor (0.0.2)
Using rdoc (3.12.2)
Installing sass-rails (4.0.1)
Using sdoc (0.3.20)
Using turbolinks (1.3.0)
Using uglifier (2.2.1)
Your bundle is complete! It was installed into ./vendor/bundle
Bundle completed (24.92s)
Cleaning up the bundler cache.
Removing sass-rails (3.2.6)
Removing puma (2.6.0)
Removing execjs (2.0.1)
Removing arel (3.0.2)
Removing rack-ssl (1.3.3)
Removing activemodel (3.2.14)
Removing coffee-rails (3.2.2)
Removing journey (1.0.4)
Removing rails (3.2.14)
Removing coffee-rails (4.0.0)
Removing sass (3.2.10)
Removing raindrops (0.12.0)
Removing pg (0.16.0)
Removing nokogiri (1.6.0)
Removing multi_json (1.8.0)
Removing mini_portile (0.5.1)
Removing rails_stdout_logging (0.0.2)
Removing json (1.8.0)
Removing unicorn (4.6.3)
Removing tzinfo (0.3.37)
Removing actionpack (3.2.14)
Removing activeresource (3.2.14)
Removing sprockets (2.2.2)
Removing sass-rails (4.0.0)
Removing builder (3.0.4)
Removing actionmailer (3.2.14)
Removing railties (3.2.14)
Removing rack-cache (1.2)
Removing bcrypt-ruby (3.0.1)
Removing kgio (2.8.1)
Removing jbuilder (1.5.1)
Removing sprockets-rails (2.0.0)
Removing activesupport (3.2.14)
Removing rack (1.4.5)
Removing activerecord (3.2.14)
-----> Writing config/database.yml to read from DATABASE_URL
-----> Preparing app for Rails asset pipeline
Running: rake assets:precompile
rake aborted!
undefined local variable or method `config' for main:Object
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/config/environments/production.rb:83:in `<top (required)>'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:591:in `block (2 levels) in <class:Engine>'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:590:in `each'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:590:in `block in <class:Engine>'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:44:in `each'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:44:in `tsort_each_child'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/config/environment.rb:5:in `<top (required)>'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:189:in `require_environment!'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:249:in `block in run_tasks_blocks'
/tmp/build_5569ec14-f1a7-4b83-aad0-121447c4ec1c/vendor/bundle/ruby/2.0.0/gems/sprockets-rails-2.0.1/lib/sprockets/rails/task.rb:54:in `block (2 levels) in define'
Tasks: TOP => environment
(See full trace by running task with --trace)
!
! Precompiling assets failed.
!
! Push rejected, failed to compile Ruby/Rails app
To git@heroku.com:mappd.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git@heroku.com:mappd.git'
Production.rb 文件（内容）
Mappd::Application.configure do
config.cache_classes = true
config.eager_load = true
config.consider_all_requests_local = false
config.action_controller.perform_caching = true
config.serve_static_assets = false
config.assets.js_compressor = :uglifier
config.assets.compile = false
config.assets.digest = true
config.assets.version = '1.0'
config.log_level = :info
config.i18n.fallbacks = true
config.active_support.deprecation = :notify
config.log_formatter = ::Logger::Formatter.new
end
config.action_mailer.default_url_options = { :host => '#' }
development.rb的内容
Mappd::Application.configure do
# Settings specified here will take precedence over those in config/application.rb.
# In the development environment your application's code is reloaded on
# every request. This slows down response time but is perfect for development
# since you don't have to restart the web server when you make code changes.
config.cache_classes = false
# Do not eager load code on boot.
config.eager_load = false
# Show full error reports and disable caching.
config.consider_all_requests_local = true
config.action_controller.perform_caching = false
# Don't care if the mailer can't send.
config.action_mailer.raise_delivery_errors = false
# Print deprecation notices to the Rails logger.
config.active_support.deprecation = :log
# Raise an error on page load if there are pending migrations
config.active_record.migration_error = :page_load
# Debug mode disables concatenation and preprocessing of assets.
# This option may cause significant delays in view rendering with a large
# number of complex assets.
config.assets.debug = true
#Required for Heroku
config.action_mailer.default_url_options = { :host => 'localhost:3000' }
end