在 Ruby 中查询 DynamoDB

Question

在我的应用中，我创建了以下 模型：

class User
   include Dynamoid::Document
   # fields
   field :user_id, type: Integer
   field :name, type: String
   field :age, type: Integer
end

然后在我的路线上：

# try search
get '/user/:user_name' do
    user = User.where(name: params[:user_name])
    if user
        json success: true, user: user
    else
        json success: false, message: 'User does not exist'
    end
end

但我得到了这个：2016-06-14 16:43:14 - NoMethodError - undefined method 'match' for nil:NilClass:

我做错了什么？我想使用 ActiveRecords

添加更多细节：

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Answer 1

堆栈跟踪中的错误似乎暗示 AWS 区域为零。您是否按照此处的文档配置了 Aws 库：

https://github.com/Dynamoid/Dynamoid

例如：

Aws.config.update({
    region: 'us-west-2',
    credentials: Aws::Credentials.new('REPLACE_WITH_ACCESS_KEY_ID', 'REPLACE_WITH_SECRET_ACCESS_KEY'),
  })

如果是这样，您能否发布 Dynamoid.configure 调用和 Aws.config.update 调用的代码。