ruby-on-rails - 为Rails模型创建Elasticsearch索引时如何修复 “Illegal Argument Exception”？

Question

我正在尝试将Elasticsearch集成到我的Rails应用程序中。当我尝试对模型进行导入时，问题就来了。 视频。__elasticsearch __。import。

因此，在Rails控制台中，我运行了 Video .__ elasticsearch __。import 。我收到此错误:
myflix_development不存在要导入到其中。使用create_index!或:force选项创建它。

然后，我运行了 Video .__ elasticsearch __。create_index! 和 Video .__ elasticsearch __。create_index!(force:true)，它们都返回相同的非法参数异常错误:

 PUT http://localhost:9200/myflix_development [status:400, request:0.027s, query:N/A]
2019-06-08 11:18:29 +0800: > {"settings":{},"mappings":{"_doc":{"properties":{}}}}
2019-06-08 11:18:29 +0800: < {"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true."}],"type":"illegal_argument_exception","reason":"The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true."},"status":400}

我了解我在尝试进行导入时应该创建一个Elasticsearch索引，但是我收到了这个让我感到困惑的非法参数异常

这是我所做的设置工作:

1)在我的gemfile中包含了这些 gem :

gem 'elasticsearch-model'
gem 'elasticsearch-rails'

2)包含一个初始化程序:app / config / initializers / elasticsearch.rb

Elasticsearch::Model.client =
  if Rails.env.staging? || Rails.env.production?
    Elasticsearch::Client.new url: ENV['SEARCHBOX_URL']
  elsif Rails.env.development?
    Elasticsearch::Client.new log: true
  else
    Elasticsearch::Client.new
  end

3)在我的视频模型中包含了elasticsearch

class Video < ActiveRecord::Base
  include Elasticsearch::Model
  index_name ["myflix", Rails.env].join("_")
  ...
end

4)Gemfile.lock

 elasticsearch (7.1.0)
      elasticsearch-api (= 7.1.0)
      elasticsearch-transport (= 7.1.0)
    elasticsearch-api (7.1.0)
      multi_json
    elasticsearch-model (6.0.0)
      activesupport (> 3)
      elasticsearch (> 1)
      hashie
    elasticsearch-rails (6.0.0)
    elasticsearch-transport (7.1.0)
      faraday
      multi_json

任何帮助将不胜感激!

编辑
1)尝试在模型中进行手动映射

class Video < ActiveRecord::Base
    include Elasticsearch::Model

    settings index: { number_of_shards: 1 } do
    mappings dynamic: 'false' do
      indexes :title, type: 'text'
      indexes :description, type: 'text'
    end
  end
...
end

Answer 1

您可以通过设置elasticsearch-model来明确定义document_type传递给Elasticsearch的文档类型。例如:

class Video < ActiveRecord::Base
  include Elasticsearch::Model
  index_name ["myflix", Rails.env].join("_")
  document_type "video"
  ...
end

您使用的名称是任意的。只要不是 _doc，就不应在v7及更高版本上遇到此错误。