Capistrano 3,Rails 4,数据库配置没有指定适配器

Question

当我开始

上限生产部署

它失败了:

DEBUG [4ee8fa7a] Command: cd /home/deploy/myapp/releases/releases/20131025212110 && (RVM_BIN_PATH=~/.rvm/bin RAILS_ENV= ~/.rvm/bin/myapp_rake assets:precompile )
DEBUG [4ee8fa7a]        rake aborted!
DEBUG [4ee8fa7a]        database configuration does not specify adapter

您可以看到"RAILS_ENV ="实际上是空的,我想知道为什么会发生这种情况？我假设这是后一个错误的原因,我没有数据库配置.

deploy.rb文件如下:

set :application, 'myapp'
set :repo_url, 'git@github.com:developer/myapp.git'
set :branch, :master
set :deploy_to, '/home/deploy/myapp/releases'
set :scm, :git
set :devpath, "/home/deploy/myapp_development"
set :user, "deploy"
set :use_sudo, false
set :default_env, { rvm_bin_path: '~/.rvm/bin' }

set :keep_releases, 5

namespace :deploy do
  desc 'Restart application'
  task :restart do
    on roles(:app), in: :sequence, wait: 5 do
      # Your restart mechanism here, for example:
      within release_path do
        execute " bundle exec thin restart -O -C config/thin/production.yml"
      end
    end
  end

  after :restart, :clear_cache do
    on roles(:web), in: :groups, limit: 3, wait: 10 do
      within release_path do

      end
    end
  end

  after :finishing, 'deploy:cleanup'
end

database.yml的:

production:
  adapter: mysql2
  encoding: utf8
  database: myapp_production
  pool: 5
  username: user
  password: pass
  host: localhost

development:
  adapter: mysql2
  encoding: utf8
  database: myapp_development
  pool: 5
  username: user
  password: pass
  host: localhost

如果我添加,问题就解决了

set :rails_env, "production"

到我的deploy.rb,但这看起来像硬编码给我,我相信有一个更好的解决方案.

Answer 1

编辑:每本拉入请求,它现在固定版本1.1.0的capistrano-rails.

根据这个Github问题,另一个修复是编辑你的Capfile.评论这两行

#require 'capistrano/rails/assets'
#require 'capistrano/rails/migrations'

把这一行放进去

require 'capistrano/rails'

这将正确设置您的RAILS_ENV变量.

Answer 2

使用Cap 3和capistrano_railsrails 4我得到了同样的错误; 在我正在部署的环境文件中,我设置了

set :stage, :production
set :rails_env, 'production' # even though doc says only need to do this if it's different

Doc在这里:https://github.com/capistrano/rails

Answer 3

似乎是capistrano-rails中的一个错误.

有一个任务(rails.rake)可以从rails_env或stage设置环境:

namespace :deploy do
  before :starting, :set_rails_env do
    set :rails_env, (fetch(:rails_env) || fetch(:stage))
  end
end

但是之前没有调用此任务,即资产:预编译.所以这:

namespace :assets do
  task :precompile do
    on roles :web do
      within release_path do
        with rails_env: fetch(:rails_env) do
          execute :rake, "assets:precompile"
        end
      end
    end
  end
end

失败,因为如果未明确设置rails_env为nil.

如果我有时间深入挖掘,我会提交错误报告.

Answer 4

根据Marc的答案,肯定是正确的答案,

你可以通过将它添加到"namespace:deploy"块中的config/deploy.rb来解决此问题,直到它被修复为上游:

  desc 'Provision env before assets:precompile'
  task :fix_bug_env do
    set :rails_env, (fetch(:rails_env) || fetch(:stage))
  end

  before "deploy:assets:precompile", "deploy:fix_bug_env"

这将强制在资产:precompile被调用之前加载env和配置RAILS_ENV.