NoMethodError（undefined method'highlight'for＃<Elasticsearch :: Model :: Response :: Result>

Question

我打算在rails項目中使用彈性搜索，當我搜索一些單詞時出現這個錯誤。，它在我的文章中過多使用的

NoMethodError (undefined method `highlight' for #<Elasticsearch::Model::Response::Result:0x007f062ed26708>) 

我在日誌生產得到了這個，這是我做了什麼，一切：在控制器 ：

 # POST /search/article 
     def search 
     render json: Article.search(params[:query]), each_serializer: ElasticsearchResultsSerializer 
     end 

這是我article.rb模型

#default_scope { order('created_at DESC') } 
    scope :visible, -> { where(enabled: true) } 

    after_commit on: [:create] do 
    self.keywords = self.keywords.each {|str| str.force_encoding("UTF-8")} 
    __elasticsearch__.index_document if self.enabled? 
    end 

    after_commit on: [:update] do 
    self.keywords = self.keywords.each {|str| str.force_encoding("UTF-8")} 
    __elasticsearch__.update_document if self.enabled? 
    end 

    after_commit on: [:destroy] do 
    __elasticsearch__.delete_document 
    end 

    settings index: { number_of_shards: 1, number_of_replicas: 0 } 

    mappings dynamic: 'false' do 
    indexes :content, type: "string", index_options: 'offsets' 
    indexes :title, type: "string" 
    indexes :description, type: "string" 
    indexes :category, type: "string" 
    indexes :created_at, type: "date" 
    indexes :keywords, type: "string" 
    end 
    def self.search(query) 
    __elasticsearch__.search(
     { 
     query: { 
      multi_match: { 
      query: query, 
      fields: ['title^10', 'content^5', 'description^2', 'keywords', 'category'] 
      } 
     }, 
     highlight: { 
      pre_tags: ['<em>'], 
      post_tags: ['</em>'], 
      fields: { title: {}, content: {} } 
     } 
     } 
    ) 
    end 

    def as_indexed_json(options={}) 
    as_json(
     only: [:content, :title, :id, :category, :keywords, :description] 
    ) 
    end 

，也是我使用串行

class ElasticsearchResultsSerializer < ActiveModel::Serializer 
    attributes :_id, :highlight, :_score, :_source 

    def _source 
    @article = object._index.singularize.capitalize.constantize.find(object._id) 
    @serializer = "#{object._index.singularize.capitalize}Serializer".constantize 
    @serializer.new(@article) 
    end 
end 

Answer 1

也許是一個愚蠢的觀察，但是你試圖改變價值

:highlight到:_highlight？

class ElasticsearchResultsSerializer < ActiveModel::Serializer 
    attributes :_id, :_highlight, :_score, :_source 

    def _source 
    @article = object._index.singularize.capitalize.constantize.find(object._id) 
    @serializer = "#{object._index.singularize.capitalize}Serializer".constantize 
    @serializer.new(@article) 
    end 
end 

Answer 2

我會嘗試切換字段：

fields: { 
    :"*" => {} 
} 

只是爲了看看是否能擺脫錯誤的。參見以下內容：https://github.com/elastic/elasticsearch-rails/issues/446