无法让mongoid使用Rails 4
我按照官方教程 。
我在我的Gemfile中注释了sqlite3以及以下行：
gem 'mongoid', '~> 4', github: 'mongoid/mongoid' gem 'bson_ext' 但是，我一直收到Specified 'sqlite3' for database adapter, but the gem is not loaded. Add gem "sqlite3" to your Gemfile. Specified 'sqlite3' for database adapter, but the gem is not loaded. Add gem "sqlite3" to your Gemfile.
原因似乎是database.yml仍然将sqlite列为数据库。 我怎么能让Rails使用生成的mongoid.yml？ 用mongoid.yml替换database.yml的内容似乎没有办法 – 我得到了
ActiveRecord::AdapterNotSpecified: database configuration does not specify adapter错误。
它与Rails 4不兼容还是我错过了一些简单的东西？
编辑：我想我变暖了。 我已将适配器添加为’mongoid’。 这是我的database.yml的内容：
development: adapter: 'mongoid' # 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: xboxie # 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: # test: sessions: default: database: xboxie_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 # # SQLite version 3.x # # gem install sqlite3 # # # # Ensure the SQLite 3 gem is defined in your Gemfile # # gem 'sqlite3' # development: # adapter: sqlite3 # database: db/development.sqlite3 # pool: 5 # timeout: 5000 # # Warning: The database defined as "test" will be erased and # # re-generated from your development database when you run "rake". # # Do not set this db to the same as development or production. # test: # adapter: sqlite3 # database: db/test.sqlite3 # pool: 5 # timeout: 5000 # production: # adapter: sqlite3 # database: db/production.sqlite3 # pool: 5 # timeout: 5000
产生错误：
LoadError: Could not load 'active_record/connection_adapters/mongoid_adapter'. Make sure that the adapter in config/database.yml is valid. If you use an adapter other than 'mysql', 'mysql2', 'postgresql' or 'sqlite3' add the necessary adapter gem to the Gemfile.
我通过添加以下内容解决了这个问题
Mongoid.load!(Rails.root.join("/config/mongoid.yml"))
根据教程， config/intializers/mongoid.rb 。
此外，您还需要在config / application.rb文件中更改以下行：
require 'rails/all'
到（在Rails 3.x中）：
require "action_controller/railtie" require "action_mailer/railtie" require "active_resource/railtie" require "rails/test_unit/railtie" # require "sprockets/railtie" # Uncomment this line for Rails 3.1+
或（在Rails 4.x中）：
# Pick the frameworks you want: # require "active_record/railtie" require "action_controller/railtie" require "action_mailer/railtie" require "sprockets/railtie" require "rails/test_unit/railtie"
我有类似的问题。 通过重新创建没有ActiveRecord的应用程序解决了所有问题…
rails new app_name --skip-active-record
如上所述添加Gems并使我的mongoid.yml正确…
检查你的config/database.yml 。 你可能在那里指定了sqlite3。
使用mongo时会发生此问题。 基本上mongo与积极的记录并不顺利。 所以使用命令生成应用程序，
rails g myApp –skip-active-record
在我的情况下运作良好
在我的情况下，我收到了来自美洲狮的类似错误。 我意识到在config / puma.rb上我有：
on_worker_boot do # worker specific setup ActiveSupport.on_load(:active_record) do config = ActiveRecord::Base.configurations[Rails.env] || Rails.application.config.database_configuration[Rails.env] config['pool'] = ENV['MAX_THREADS'] || 16 ActiveRecord::Base.establish_connection(config) end end
我必须使用config / initializers / mongoid.rb的内容替换on_worker_boot中的所有内容
一般来说，我认为调试它的一个好方法是在代码上搜索对active_record的任何引用。
我也得到了同样的错误
"Could not load active_record/connection_adapters/mongoid_adapter".
我可以通过在deveopment.rb中注释“config.active_record.migration_error =：page_load”并在application.rb中注释“config.active_record.raise_in_transactional_callbacks = true”来解决它。 还要确保在database.yml中，未在sqlite3中指定数据库，而是指定mongoid。 您还需要从application.rb中删除“require’trail / all’”并将其替换为
require "action_controller/railtie" require "action_mailer/railtie" require "sprockets/railtie" require "rails/test_unit/railtie"
如上述评论中所述。