導軌 - Mongoid生產，rake命令錯誤：

我mongoid.yml：導軌 - Mongoid生產，rake命令錯誤：

production: 
    sessions: 
    default: 
     database: kvallspressen_production 
     hosts: 
     - localhost:27017 
     options: 
    options: 

development: 
    # Configure available database sessions. (required) 
    sessions: 
    # Defines the default session. (required) 
    default: 
     # Defines the name of the default database that Mongoid can connect to. 
     # (required). 
     database: kvallspressen_development 
     # Provides the hosts the default session can connect to. Must be an array 
     # of host:port pairs. (required) 
     hosts: 
     - localhost:27017 
     options: 
     # Change whether the session persists in safe mode by default. 
     # (default: false) 
     # safe: false 

     # Change the default consistency model to :eventual or :strong. 
     # :eventual will send reads to secondaries, :strong sends everything 
     # to master. (default: :eventual) 
     # consistency: :eventual 

     # How many times Moped should attempt to retry an operation after 
     # failure. (default: 30) 
     # max_retries: 30 

     # The time in seconds that Moped should wait before retrying an 
     # operation on failure. (default: 1) 
     # retry_interval: 1 
    # Configure Mongoid specific options. (optional) 
    options: 
    # Configuration for whether or not to allow access to fields that do 
    # not have a field definition on the model. (default: true) 
    # allow_dynamic_fields: true 

    # Enable the identity map, needed for eager loading. (default: false) 
    # identity_map_enabled: false 

    # Includes the root model name in json serialization. (default: false) 
    # include_root_in_json: false 

    # Include the _type field in serializaion. (default: false) 
    # include_type_for_serialization: false 

    # Preload all models in development, needed when models use 
    # inheritance. (default: false) 
    # preload_models: false 

    # Protect id and type from mass assignment. (default: true) 
    # protect_sensitive_fields: true 

    # Raise an error when performing a #find and the document is not found. 
    # (default: true) 
    # raise_not_found_error: true 

    # Raise an error when defining a scope with the same name as an 
    # existing method. (default: false) 
    # scope_overwrite_exception: false 

    # Skip the database version check, used when connecting to a db without 
    # admin access. (default: false) 
    # skip_version_check: false 

    # User Active Support's time zone in conversions. (default: true) 
    # use_activesupport_time_zone: true 

    # Ensure all times are UTC in the app side. (default: false) 
    # use_utc: false 
test: 
    sessions: 
    default: 
     database: kvallspressen_test 
     hosts: 
     - localhost:27017 
     options: 
     consistency: :strong 
     # In the test environment we lower the retries and retry interval to 
     # low amounts for fast failures. 
     max_retries: 1 
     retry_interval: 0

當我運行RAILS_ENV=production rake db:create

我收到此錯誤：

** Invoke db:create (first_time) 
** Invoke environment (first_time) 
** Execute environment 
rake aborted! 
undefined method `has_key?' for nil:NilClass 
/usr/local/lib/ruby/gems/2.0.0/gems/mongoid-3.0.23/lib/mongoid/config/validators/session.rb:99:in `no_database_or_uri?' 
/usr/local/lib/ruby/gems/2.0.0/gems/mongoid-3.0.23/lib/mongoid/config/validators/session.rb:45:in `validate_session_database' 
/usr/local/lib/ruby/gems/2.0.0/gems/mongoid-3.0.23/lib/mongoid/config/validators/session.rb:25:in `block in validate' 
/usr/local/lib/ruby/gems/2.0.0/gems/mongoid-3.0.23/lib/mongoid/config/validators/session.rb:24:in `each_pair' 
/usr/local/lib/ruby/gems/2.0.0/gems/mongoid-3.0.23/lib/mongoid/config/validators/session.rb:24:in `validate' 
/usr/local/lib/ruby/gems/2.0.0/gems/mongoid-3.0.23/lib/mongoid/config.rb:183:in `sessions=' 
/usr/local/lib/ruby/gems/2.0.0/gems/mongoid-3.0.23/lib/mongoid/config.rb:213:in `load_configuration' 
/usr/local/lib/ruby/gems/2.0.0/gems/mongoid-3.0.23/lib/mongoid/config.rb:85:in `load!' 
/usr/local/lib/ruby/gems/2.0.0/gems/mongoid-3.0.23/lib/mongoid.rb:146:in `load!' 
/usr/local/lib/ruby/gems/2.0.0/gems/mongoid-3.0.23/lib/mongoid/railtie.rb:67:in `block in <class:Railtie>' 
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.12/lib/rails/initializable.rb:30:in `instance_exec' 
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.12/lib/rails/initializable.rb:30:in `run' 
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.12/lib/rails/initializable.rb:55:in `block in run_initializers' 
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.12/lib/rails/initializable.rb:54:in `each' 
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.12/lib/rails/initializable.rb:54:in `run_initializers' 
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.12/lib/rails/application.rb:136:in `initialize!' 
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.12/lib/rails/railtie/configurable.rb:30:in `method_missing' 
/var/www/kvallspressen/config/environment.rb:5:in `<top (required)>' 
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.12/lib/rails/application.rb:103:in `require' 
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.12/lib/rails/application.rb:103:in `require_environment!' 
/usr/local/lib/ruby/gems/2.0.0/gems/railties-3.2.12/lib/rails/application.rb:297:in `block (2 levels) in initialize_tasks' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/task.rb:228:in `call' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/task.rb:228:in `block in execute' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/task.rb:223:in `each' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/task.rb:223:in `execute' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/task.rb:166:in `block in invoke_with_call_chain' 
/usr/local/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/task.rb:159:in `invoke_with_call_chain' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/task.rb:187:in `block in invoke_prerequisites' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/task.rb:185:in `each' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/task.rb:185:in `invoke_prerequisites' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/task.rb:165:in `block in invoke_with_call_chain' 
/usr/local/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/task.rb:159:in `invoke_with_call_chain' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/task.rb:152:in `invoke' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/application.rb:143:in `invoke_task' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/application.rb:101:in `block (2 levels) in top_level' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/application.rb:101:in `each' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/application.rb:101:in `block in top_level' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/application.rb:110:in `run_with_threads' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/application.rb:95:in `top_level' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/application.rb:73:in `block in run' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/application.rb:160:in `standard_exception_handling' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/lib/rake/application.rb:70:in `run' 
/usr/local/lib/ruby/gems/2.0.0/gems/rake-10.0.3/bin/rake:33:in `<top (required)>' 
/usr/local/bin/rake:23:in `load' 
/usr/local/bin/rake:23:in `<main>' 
Tasks: TOP => db:create => environment

的Gemfile：

source 'http://rubygems.org' 

gem 'rails', '3.2.12' 

# Bundle edge Rails instead: 
# gem 'rails', :git => 'git://github.com/rails/rails.git' 



# Gems used only for assets and not required 
# in production environments by default. 
group :assets do 
    gem "less-rails", "~> 2.2.6" 
    gem 'coffee-rails', '~> 3.2.1' 

    # See https://github.com/sstephenson/execjs#readme for more supported runtimes 
    gem 'therubyracer', :platforms => :ruby 
    gem "sass-rails", "~> 3.2.6" 
    gem "twitter-bootstrap-rails", '2.1.4' 
    gem 'bootstrap-sass', '~> 2.3.0.1' 
    gem 'uglifier', '>= 1.0.3' 
end 

gem 'jquery-rails' 

# To use ActiveModel has_secure_password 
# gem 'bcrypt-ruby', '~> 3.0.0' 

# To use Jbuilder templates for JSON 
# gem 'jbuilder' 

# Use unicorn as the app server 
gem 'unicorn' 

# Deploy with Capistrano 
# gem 'capistrano' 

# To use debugger 
# gem 'debugger' 

gem "mongoid", "~> 3.0.0"

我是在Ubuntu 10.04.4 LTS上，使用rails 3.2.12，ruby 2.0.0p0（2013-02-24 revision 39474）[i686-linux]

剛剛在我的本地環境中測試過這個。 OSX 10.8.x並出現相同的錯誤。

我錯過了什麼？

來源

2013-03-14 Philip

堆棧跟蹤加載它一般都是無益，除了前幾行之外。你的mongoid.yml開發部分是否也有空的'options'鍵？看起來你應該把這些留在外面。 – 2013-03-14 17:11:51

我的發展環境。完美的作品。我用mongoid.yml的完整配置更新 – Philip 2013-03-14 17:12:57

然後讓我們看看gemfile。 – 2013-03-14 17:20:36

我剛剛發現這個在Mongoid home page：

db:create: Exists only for dependency purposes, does not actually do anything.

因此，當耙試圖訪問你的數據庫（它爲什麼這樣做，我不知道），因爲它不存在拋出一個錯誤。

相反，mongoid提供這樣的：

db:seed: Seeds the database from db/seeds.rb

db:setup: Creates indexes and seeds the database.

因此，您的基本DB設置應以dB/seeds.rb定義，你可以用

rake db:setup

來源

2013-03-14 19:39:55

我得到的問題是，我得到上述命令相同的錯誤。 – Philip 2013-03-15 08:39:57

導軌 - Mongoid生產，rake命令錯誤：

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