ruby-on-rails - 使用 Sunspot 查询具有不同属性的多个模型

Question

我正在使用 Sunspot 对 Rails 项目中的多个模型进行索引和搜索，我需要根据模型的 HABTM 关联限制结果 Department模型。这是因为用户可能无权查看所有部门的记录，因此不应返回这些部门的结果。

以下是两个模型的重要部分:

class Message < ActiveRecord::Base
  has_many :comments, dependent: :destroy
  has_and_belongs_to_many :departments

  searchable do
    text :title, :body
    text :comments do
      comments.map(&:body)
    end
    date :created_at
    integer :department_ids, using: :department_ids, references: Department, multiple: true
  end
end

class Document < ActiveRecord::Base
  has_and_belongs_to_many :departments

  searchable do
    text :name
    date :created_at
    integer :department_ids, using: :department_ids, references: Department, multiple: true
  end
end

这是搜索 Controller 代码:

class SearchController < ApplicationController
  def index
    # These arrays are created here for the sake of this example
    document_permitted_departments = [1, 2, 3]
    message_permitted_departments = [3, 4]

    search = Sunspot.search Document, Message do
      # This obviously doesn't work
      with(:department_ids, document_permitted_departments)
      with(:department_ids, message_permitted_departments)
      fulltext params[:q]
      paginate page: params[:page], per_page: SEARCH_RESULTS_PER_PAGE
      order_by :created_at, :desc
    end
    @results = search.results
    @number_of_results = search.total

    respond_to do |format|
      format.js
      format.html
    end
  end
end

问题是用户可能能够阅读部门 A 和部门 B 中的文档，但他们应该只能看到部门 B 中的消息。

有没有办法申请 with范围到多模型搜索中的特定模型？还是有另一种方法可以做到这一点，我想念？

Answer 1

经过更多的谷歌搜索和一些反复试验，我终于弄明白了。这是我最终得到的代码的大量注释版本:

class SearchController < ApplicationController
  before_filter :authenticate_user!

  def index
    # These arrays are created here for the sake of this example
    # Push 0 on to the end because empty arrays break the `with :department_ids` scopes below
    document_permitted_departments = [1, 2, 3].push(0)
    message_permitted_departments = [3, 4].push(0)

    search = Sunspot.search Document, Message do
      any_of do # Return anything that matches any of the scopes in this block
        all_of do # Return only those results that match these scopes
          with :class, Document # This limits scopes in this block to Document results
          with :department_ids, document_permitted_departments
        end

        all_of do # Return only those results that match these scopes
          with :class, Message # This limits scopes in this block to Message results
          with :department_ids, message_permitted_departments
        end
      end

      fulltext params[:q]
      paginate page: params[:page], per_page: SEARCH_RESULTS_PER_PAGE
      order_by :created_at, :desc
    end
    @results = search.results
    @number_of_results = search.total

    respond_to do |format|
      format.js # index.js.erb
      format.html # index.html.erb
    end
  end
end