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我正在使用 elasticsearch-rails 和 elasticsearch-model gem 在我的 rails 应用程序中搜索单词。

这是我要搜索的模型article.rb ：

require 'elasticsearch/model'

class Article < ActiveRecord::Base
  include Elasticsearch::Model
  include Elasticsearch::Model::Callbacks

  settings index: { number_of_shards: 1 } do
    mappings dynamic: 'false' do
      indexes :title, analyzer: 'english', index_options: 'offsets'
      indexes :text, analyzer: 'english'
    end
  end

  def self.search(query)
    __elasticsearch__.search(
      {
        query: {
          multi_match: {
            query: query,
            fields: ['title^10', 'text']
          }
        },
        highlight: {
          pre_tags: ['<em>'],
          post_tags: ['</em>'],
          fields: {
            title: {},
            text: {}
          }
        }
      }
    )
  end
end

# Delete the previous articles index in Elasticsearch
Article.__elasticsearch__.client.indices.delete index: Article.index_name rescue nil

# Create the new index with the new mapping
Article.__elasticsearch__.client.indices.create \
  index: Article.index_name,
  body: { settings: Article.settings.to_hash, mappings: Article.mappings.to_hash }

# Index all article records from the DB to Elasticsearch
Article.import

#Article.import force: true

这是我的search.html.erb：

<h1>Articles Search</h1>

<%= form_for search_path, method: :get do |f| %>
  <p>
    <%= f.label "Search for" %>
    <%= text_field_tag :q, params[:q] %>
    <%= submit_tag "Go", name: nil %>
  </p>
<% end %>

<ul>
  <% @articles.each do |article| %>
    <li>
      <h3>
        <%= link_to article.try(:highlight).try(:title) ? article.highlight.title[0].html_safe : article.title,
          controller: "articles",
          action: "show",
          id: article._id%>
      </h3>
      <% if article.try(:highlight).try(:text) %>
        <% article.highlight.text.each do |snippet| %>
          <p><%= snippet.html_safe %>...</p>
        <% end %>
      <% end %>
    </li>
  <% end %>
</ul>

这是我的routes.rb：

Rails.application.routes.draw do
  resources :articles
  get 'search', to: 'search#search'
end

这是我的search_controller.rb：

class SearchController < ApplicationController
  def search
    if params[:q].nil?
      @articles = []
    else
      @articles = Article.search params[:q]
    end
  end
end

现在，我得到的结果只匹配单词。我的问题是：如何进行复合匹配？我不明白这个功能是如何工作的 - 以及如何更改查询？

 def self.search(query)
            __elasticsearch__.search(
              {
                query: {
                  multi_match: {
                    query: query,
                    fields: ['title^10', 'text']
                  }
                },
                highlight: {
                  pre_tags: ['<em>'],
                  post_tags: ['</em>'],
                  fields: {
                    title: {},
                    text: {}
                  }
                }
              }
            )
          end
        end

还有如何提高复合匹配、拼写检查、部分匹配等准确性？谢谢你。

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0 回答 0