Mongodb in rails：無法連接到副本的主節點

Question

我是rails和mongodb的新手。我已經產生mongod的模式在我的Rails項目名稱爲論壇 當我試圖添加使用下面的命令記錄在軌控制檯

f = Forum.new 
f.topic_name = "my_topic" 
f.save 

我收到以下錯誤

Moped::Errors::ConnectionFailure: Could not connect to a primary node for replic 
a set #<Moped::Cluster:25470936 @seeds=[<Moped::Node resolved_address=nil>]> 

我運行的mongod服務器在端口27017 以下是我mongoid.yml文件

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: local 
     # Provides the hosts the default session can connect to. Must be an array 
     # of host:port pairs. (required) 
     hosts: 
     - localhost:27017 
     options: 
     # Change the default write concern. (default = { w: 1 }) 
     # write: 
     # w: 1 

     # Change the default consistency model to primary, secondary. 
     # 'secondary' will send reads to secondaries, 'primary' sends everything 
     # to master. (default: primary) 
     # read: secondary_preferred 

     # 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: 
    # 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 

    # 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: local 
     hosts: 
     - localhost:27017 
     options: 
     read: primary 
     # In the test environment we lower the retries and retry interval to 
     # low amounts for fast failures. 
     max_retries: 1 
     retry_interval: 0 

該怎麼辦？

Answer 1

查看您的主機文件中的本地主機映射或嘗試主機爲0.0.0.0:27017。

有關主機文件的信息：http://en.wikipedia.org/wiki/Hosts_(file)