我想用mongodb在rails中创建我的第一个web应用程序,但是我正在遇到一些正确集成的麻烦。首先,这里是我的database.yml文件:Rails 3.0.7和Mongodb集成
development:
adapter: mongodb
database: mongo_development
host: localhost
test:
adapter: mongodb
database: mongo_test
host: localhost
production:
adapter: mongodb
database: mongo_production
host: localhost
在几个教程之一,我看到了一个ActiveRecord的模型等效 - MongoMapper。例如我的用户模型:
class User
include MongoMapper::Document
key :name, String
key :age, Integer
many :books
end
我还添加了mongodb.rb到config /初始化:
db_config = YAML::load(File.read(RAILS_ROOT + "/config/database.yml"))
if db_config[Rails.env] &&
db_config[Rails.env]['adapter'] == 'mongodb'
mongo = db_config[Rails.env]
MongoMapper.connection = Mongo::Connection.new(mongo['hostname'])
MongoMapper.database = mongo['database']
end
我创建控制器为用户:
class UsersController < ApplicationController
def index
user = User.new(:name => 'Brandon')
user.books.build(:name => 'Programming', :started => 10.years.ago)
user.save!
puts User.where(:name => 'Brandon').first
end
end
但我m仍然出现错误:
Please install the mongodb adapter: `gem install activerecord-mongodb-adapter` (no such file to load -- active_record/connection_adapters/mongodb_adapter)
我已安装宝石:
abstract (1.0.0)
actionmailer (3.0.7)
actionpack (3.0.7)
activemodel (3.0.7)
activerecord (3.0.7)
activeresource (3.0.7)
activesupport (3.0.8, 3.0.7)
....
mongo (1.3.1)
mongo_mapper (0.9.1)
rails (3.0.7)
railties (3.0.7)
rake (0.9.2)
rubygems-update (1.8.5)
任何人都可以帮忙吗?
UPDATE
我删除mongodb.rb初始化,database.yml的和使用rails g mongo_mapper:config
。它创建的文件mongo.yml:
defaults: &defaults
host: 127.0.0.1
port: 27017
development:
<<: *defaults
database: mongo_db_app_development
test:
<<: *defaults
database: mongo_db_app_tests
# set these environment variables on your prod server
production:
<<: *defaults
database: mongo_db_app
username: <%= ENV['MONGO_USERNAME'] %>
password: <%= ENV['MONGO_PASSWORD'] %>
但我得到的错误:No such file or directory - /home/adm/NetBeansProjects/MongoDBApp/config/database.yml
所以我复制了mongo.yml文件的内容到database.yml,我得到了错误:
ActiveRecord::AdapterNotSpecified database configuration does not specify adapter