Elasticsearch::Transport::Transport::Errors::BadRequest [400]在创建索引时

Question

在我的rails应用程序中，安装了' elasticsearch - model‘和'elasticsearch-rails’宝石，elasticsearch (v5.1.1)运行在默认端口上，模型如下所示

class Article
  include Mongoid::Document
  include Elasticsearch::Model
  include Elasticsearch::Model::Callbacks

  field :title, type: String
  field :author, type: String

  index_name "articles-#{Rails.env}"
end

初始化器是这样的

Elasticsearch::Model.client = Elasticsearch::Client.new host: ENV['ELASTICSEARCH_URL'] || "http://localhost:9200/"

当我试图导入或创建索引时

Article.import force:true
Article.__elasticsearch__.create_index! force: true 

我得到以下错误

 Elasticsearch::Transport::Transport::Errors::BadRequest: [400] No handler found for uri [//articles-development] and method [DELETE]
  from /Users/bgr/.rvm/gems/ruby-2.3.0/gems/elasticsearch-transport-1.0.17/lib/elasticsearch/transport/transport/base.rb:201:in `__raise_transport_error'
  from /Users/bgr/.rvm/gems/ruby-2.3.0/gems/elasticsearch-transport-1.0.17/lib/elasticsearch/transport/transport/base.rb:312:in `perform_request'
  from /Users/bgr/.rvm/gems/ruby-2.3.0/gems/elasticsearch-transport-1.0.17/lib/elasticsearch/transport/transport/http/faraday.rb:20:in `perform_request'
  from /Users/bgr/.rvm/gems/ruby-2.3.0/gems/elasticsearch-transport-1.0.17/lib/elasticsearch/transport/client.rb:128:in `perform_request'

Answer 1

经过一番调查，问题出在我的初始化器上。它在更换主机后起了作用。

Elasticsearch::Model.client = Elasticsearch::Client.new host: ENV['ELASTICSEARCH_URL'] || "localhost:9200"

显然，更新的配置适用于ElasticSearch2.4.x。

Answer 2

在我的场景中，更改DATABASE_URL格式、使用.env或保存它的地方：

DATABASE_URL=postgres:/myapp_development?pool=5

至：

DATABASE_URL=postgresql://user:password@localhost:5432/myapp_development