我关注了this tutorial使用 Mongoid 和 Mongodb 设置基本的 Rails 4 应用程序。

我在服务器上设置了 Passenger 以进行部署。当我访问 domain.com:3000 时，应用程序可以正常工作。此外，当我访问 domain.com:28017 时，它显示 mongodb 正在运行。

在所有示例/教程中，我可以找到该应用程序托管在 localhost:3000，而我正在尝试部署到我的实际域。

当我访问 domain.com 时，我收到以下错误消息:

Problem:
  No sessions configuration provided.
Summary:
  Mongoid's configuration requires that you provide details about each session that can be     connected to, and requires in the sessions config at least 1 default session to exist.
Resolution:
  Double check your mongoid.yml to make sure that you have a top-level sessions key with at least      1 default session configuration for it. You can regenerate a new mongoid.yml for assistance via     `rails g mongoid:config`.

 Example:
   development:
     sessions:
       default:
         database: mongoid_dev
         hosts:
           - localhost:27017

 (Mongoid::Errors::NoSessionsConfig)

问题似乎是我的 mongoid.yml 文件，如下所示:

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: myapp_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:
    # 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

    # Use 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: myapp_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

这个问题通常是如何解决的？提前致谢

最佳答案

Passenger作为部署工具，默认运行在生产环境。

您的 mongoid.yml 文件目前仅包含用于开发和测试的设置。您需要为生产添加配置。

类似于:

production:
  sessions:
    default:
      database: myapp_production
      hosts:
        - localhost

关于mongodb - 如何将 rails + mongodb 应用程序部署到实际域？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/18903142/