Elastic Search/Tire: How to map to association attribute?

问题

I'm using Tire for Elastic Search. In my application I have 2 models; Price and Product.

I'm trying to search my Price class and use the Product it belongs to's :name attribute for the search field. Right now if I had a product called Product 1 and type in "pro", "prod" or "duct", no results come up. But typing "product" or "Product" shows the results. I believe the problem lies in my mapping. I looked at the query and its:

...localhost:3000/search/results?utf8=%E2%9C%93&query=product

When I think it should be:

...localhost:3000/search/results?utf8=%E2%9C%93&query:product=product

Judging by this question: ElasticSearch mapping doesn't work

I don't know how to make my params[:query] to take the product.name only though. I tried to use: string params[:query], default_field: "product.name" but that didn't work.

I don't want to use the _all field.

Here is my code:

Price.rb

  include Tire::Model::Search
  include Tire::Model::Callbacks

  def self.search(params)
    tire.search(load: true, page: params[:page], per_page: 20) do
       query do
         boolean do
            must { string params[:query] } if params[:query].present?
            must { term :private, false }
         end
       end
       sort do
         by :date, "desc"
         by :amount, "asc"
       end
    end
  end

  def to_indexed_json
    to_json( include: { product: { only: [:name] } } )
  end

  mapping do
    indexes :id,        type: "integer"
    indexes :amount,    type: "string", index: "not_analyzed"
    indexes :date,      type: "date",   index: "not_analyzed"
    indexes :private,   type: "boolean"
    indexes :product do
      indexes :name, type: "string", analyzer: "custom_analyzer"
    end
  end

  settings analysis: {
    analyzer: {
      custom_analyzer: {
        tokenizer: [ "whitespace", "lowercase" ],
        filter: [ "ngram_filter", "word_delimiter_filter" ],
        type: "custom"
      }
    },
    filter: {
      ngram_filter: {
        type: "nGram",
        min_gram: 2,
        max_gram: 15
      }
    },
    filter: {
      word_delimiter_filter: {
        type: "word_delimiter",
        generate_word_parts: true,
        generate_number_parts: true,
        preserve_original: true,
        stem_english_possessive: true
      }
    }
  }

So does anyone have any suggestions or know how to set the query field to use the Product name only?

Thank you.

回答1:

When you do

 query   { string params[:query] } 

and the query doesn't specify a field, you're searching the magic _all field. This field has its own analyzer settings - it's won't be using the one you've setup for your name field.

You can either configure the _all field to use your analyser, change the default analyser or change your query to query the name field specifically, for example

 query { string params[:query], :default_field => 'name'}

回答2:

This was to much of a headache so I ended going to Ransack which was insanely much easier to figure out and use.

来源：https://stackoverflow.com/questions/12072319/elastic-search-tire-how-to-map-to-association-attribute