MongoDB无法使用Mongoid连接到MongoHQ [英] MongoDB won't connect to MongoHQ using Mongoid

问题描述

我刚刚开始一个全新的Rails项目，而我要完成的第一个任务是创建一个对象并将其保存在数据库中.我经历了一种自动生成对象的方法，在这种情况下，它是一个URL对象，如下所示:

I've just started a brand new rails project and the first task I'm trying to complete is creating an object and having it save within my database. I went through the automated way of generating an object, in this case a URL object as follows:

rails generate scaffold Url domain:string

我还测试了两个单独的mongoid.yml配置设置.第一个如下:

I've also tested out two separate mongoid.yml configuration settings. The first is as follows:

development:
  sessions:
    default:
      # Defines the name of the default database that Mongoid can connect to.
      # (required).
      uri: mongodb://[username]:[password]@flame.mongohq.com:27046/[database]

      options:
        consistency: :strong 

此配置的结果是，发生查询时，出现以下错误:

The result of this configuration is that when a query takes place, I get the following error:

The operation: #<Moped::Protocol::Query
  @length=39
  @request_id=5
  @response_to=0
  @op_code=2004
  @flags=[]
  @full_collection_name=".urls"
  @skip=0
  @limit=0
  @selector={}
  @fields=nil>
 failed with error 13075: "db name can't be empty"

我还使用以下配置进行了测试:

I also tested with the following configuration:

development:
  uri: mongodb://[username]:[password]@flame.mongohq.com:27046/[database]

当代码到达urls_controller的create方法时，它在@ url.save失败，并显示以下错误:

When the code gets to the create method of the urls_controller it fails at @url.save with the following error:

mongoid (3.0.0.rc) lib/mongoid/sessions/factory.rb:100:in `parse'
mongoid (3.0.0.rc) lib/mongoid/sessions/factory.rb:61:in `create_session'
mongoid (3.0.0.rc) lib/mongoid/sessions/factory.rb:43:in `default'
mongoid (3.0.0.rc) lib/mongoid/sessions.rb:109:in `default'
mongoid (3.0.0.rc) lib/mongoid/sessions.rb:354:in `__session__'
mongoid (3.0.0.rc) lib/mongoid/sessions.rb:199:in `mongo_session'
mongoid (3.0.0.rc) lib/mongoid/sessions.rb:157:in `collection'
mongoid (3.0.0.rc) lib/mongoid/sessions.rb:25:in `collection'
mongoid (3.0.0.rc) lib/mongoid/persistence/operations.rb:26:in `collection'
mongoid (3.0.0.rc) lib/mongoid/persistence/operations/insert.rb:27:in `block in persist'
mongoid (3.0.0.rc) lib/mongoid/persistence/insertion.rb:25:in `block (2 levels) in  prepare'
activesupport (3.2.3) lib/active_support/callbacks.rb:403:in `_run__2492706777632263523__create__3276423133299307975__callbacks'
activesupport (3.2.3) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.3) lib/active_support/callbacks.rb:385:in `_run_create_callbacks'
activesupport (3.2.3) lib/active_support/callbacks.rb:81:in `run_callbacks'
mongoid (3.0.0.rc) lib/mongoid/callbacks.rb:95:in `run_callbacks'
mongoid (3.0.0.rc) lib/mongoid/persistence/insertion.rb:24:in `block in prepare'
activesupport (3.2.3) lib/active_support/callbacks.rb:403:in  `_run__2492706777632263523__save__3276423133299307975__callbacks'
activesupport (3.2.3) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.3) lib/active_support/callbacks.rb:385:in `_run_save_callbacks'
activesupport (3.2.3) lib/active_support/callbacks.rb:81:in `run_callbacks'
mongoid (3.0.0.rc) lib/mongoid/callbacks.rb:95:in `run_callbacks'
mongoid (3.0.0.rc) lib/mongoid/persistence/insertion.rb:23:in `prepare'
mongoid (3.0.0.rc) lib/mongoid/persistence/operations/insert.rb:26:in `persist'
mongoid (3.0.0.rc) lib/mongoid/persistence.rb:49:in `insert'
mongoid (3.0.0.rc) lib/mongoid/persistence.rb:188:in `upsert'
app/controllers/urls_controller.rb:46:in `block in create'

我的假设是我的mongoid.yml文件不正确，但是我不确定如何使它工作.有什么想法吗?

My assumption is that my mongoid.yml file is incorrect but I'm not sure how to get this to work. Any thoughts?

推荐答案

这就是我制作的mongoid.yml的样子

This is how my production mongoid.yml looks like

<% if ENV['MONGOLAB_URI'] %>
  <% uri = URI.parse(ENV['MONGOLAB_URI']) %>
production:
  <<: *defaults
  sessions:
    default:
      <<: *default_session
      database: <%= uri.path.sub('/','') %>
      username: <%= uri.user %>
      password: <%= uri.password %>
      hosts:
        - <%= uri.host %>:<%= uri.port %>
<% end %>

这对我有用

这篇关于MongoDB无法使用Mongoid连接到MongoHQ的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！