rake assets:precompile, rake aborted - 错误推送到 heroku - ruby​​ on rails

Question

我一直在尝试将我的 Ruby on Rails 应用程序部署到 Heroku，但遇到了错误。非常感谢您提前提供的帮助！

我一直按照此链接中的说明部署我的应用程序：http://curriculum.railsbridge.org/intro-to-rails/deploying_to_heroku

我将 gemfile 更改为以下内容，然后运行 ​​

bundle install --without production

宝石文件：

source 'https://rubygems.org'

git_source(:github) do |repo_name|
  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
  "https://github.com/#{repo_name}.git"
end
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.0.3'

# Use Puma as the app server
gem 'puma', '~> 3.0'
# 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', '~> 4.2'
# 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 navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 3.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# 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', platform: :mri
  gem 'sqlite3'
end

group :development do
  # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '~> 3.0.5'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

group :production do
  gem 'pg'
  gem 'rails_12factor'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

gem 'bootstrap-sass', '~> 3.3.7'
gem 'devise', '~> 4.2'

gem 'toastr-rails', "~> 1.0"

gem 'omniauth', '~> 1.6'
gem 'omniauth-facebook', '~> 4.0'
gem 'paperclip', '~> 5.1.0'
gem 'geocoder', '~> 1.4'

gem 'jquery-ui-rails', '~> 5.0'
gem 'momentjs-rails', '~> 2.17'

以下是 Heroku 的构建日志。它抱怨在 gemfile 中没有 gem 'pg'，但我确实添加了它并且也做了捆绑安装。

Running: rake assets:precompile
       rake aborted!
       Gem::LoadError: Specified 'postgresql' for database adapter, but the gem is not loaded. Add `gem 'pg'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).

从heroku构建日志

-----> Ruby app detected
-----> Compiling Ruby/Rails
-----> Using Ruby version: ruby-2.3.4
###### WARNING:
       You have the `.bundle/config` file checked into your repository
       It contains local state like the location of the installed bundle
       as well as configured git local gems, and other settings that should
       not be shared between multiple checkouts of a single repo. Please
       remove the `.bundle/` folder from your repo and add it to your `.gitignore` file.
       https://devcenter.heroku.com/articles/bundler-configuration
-----> Installing dependencies using bundler 1.15.2
       Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment
       Warning: the running version of Bundler (1.15.2) is older than the version that created the lockfile (1.16.1). We suggest you upgrade to the latest version of Bundler by running `gem install bundler`.
       <Fetching a ton of things.....>
       Bundle complete! 25 Gemfile dependencies, 82 gems now installed.
       Gems in the groups development, test and production were not installed.
       Bundled gems are installed into ./vendor/bundle.
       Post-install message from paperclip:
       ##################################################
       #  NOTE FOR UPGRADING FROM 4.3.0 OR EARLIER       #
       ##################################################
       Paperclip is now compatible with aws-sdk >= 2.0.0.
       If you are using S3 storage, aws-sdk >= 2.0.0 requires you to make a few small
       changes:
       * You must set the `s3_region`
       * If you are explicitly setting permissions anywhere, such as in an initializer,
       note that the format of the permissions changed from using an underscore to
       using a hyphen. For example, `:public_read` needs to be changed to
       `public-read`.
       For a walkthrough of upgrading from 4 to 5 and aws-sdk >= 2.0 you can watch
       http://rubythursday.com/episodes/ruby-snack-27-upgrade-paperclip-and-aws-sdk-in-prep-for-rails-5
       Bundle completed (25.24s)
       Cleaning up the bundler cache.
-----> Installing node-v6.11.1-linux-x64
-----> Detecting rake tasks
-----> Preparing app for Rails asset pipeline
       Running: rake assets:precompile
       rake aborted!
       Gem::LoadError: Specified 'postgresql' for database adapter, but the gem is not loaded. Add `gem 'pg'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).
       /tmp/build_b5def35a67e05bc1af4c0bb3931868f9/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.6/lib/active_record/connection_adapters/connection_specification.rb:176:in `rescue in spec'
       
<more errors here>
       /tmp/build_b5def35a67e05bc1af4c0bb3931868f9/vendor/bundle/ruby/2.3.0/gems/rake-12.3.0/exe/rake:27:in `<top (required)>'
       Tasks: TOP => environment
       (See full trace by running task with --trace)
 !
 !     Precompiling assets failed.
 !
 !     Push rejected, failed to compile Ruby app.
 !     Push failed

Answer 1

这可能不是您想要的答案，但您应该避免使用 sqlite3 进行开发，然后切换到 pg 进行生产，因为可移植性问题和一般的头痛问题。

我建议您按照以下方式重新创建您的应用：

rails new name-of-app --database=postgresql

在开发过程中，您总是要考虑到最终产品。如果您知道要将其部署到 Heroku，那么您就知道您将需要 PostgreSQL，或者如果您不知道，现在就需要。

您总是希望您的开发环境尽可能地类似于您的生产环境。