Rails/MongoId - 使用條件標準在多個模型上連接多個查詢

我有三個模型：文化，自然和歷史。Rails/MongoId - 使用條件標準在多個模型上連接多個查詢

我也有包含用戶的搜索審覈規定陣列：

["nature", "culture", "history"]

當然，這種陣列可能只包含一個或兩個標準（例如「自然和文化」，或只是「自然」等）

根據這個數組，我想查詢相應的模型並將結果呈現在唯一的集合中。

我已經嘗試了很多東西，比如：

@sites = Culture.where(:coordinates => {"$ne" => "", "$ne" => nil}) 

if array_type_sites.include?("nature") 
     @sitesNature = Nature.where(:coordinates => {"$ne" => "", "$ne" => nil}) 
     @sites << @sitesNature 
end 
if array_type_sites.include?("culture") 
     @sitesCulture = Culture.where(:coordinates => {"$ne" => "", "$ne" => nil}) 
     @sites << @sitesCulture 
end 

return @sites

在這段代碼，@sites不與@sitesCulture實現的，只能用@sitesNature。

讓這項工作最好的方法是什麼？

來源

2014-07-18 GrégoireC

你有沒有在Mongoid中試過繼承？ http://mongoid.org/en/mongoid/docs/documents.html#inheritance

以下測試做了我認爲你想要做的事情，其中保存了文件，歷史和自然對象，並將其從保留類型的集合中存儲和提取。我希望你覺得這個有用。

應用程序/模型/興趣

class Interest 
    include Mongoid::Document 
    field :description, type: String 
    field :coordinates, type: String 
end

應用程序/模型/文化

class Culture < Interest; end

應用程序/模型/歷史

class History < Interest; end

應用程序/模型/自然

class Nature < Interest; end

測試/單元/ interest_test.rb

require 'test_helper' 
require 'pp' 

class InterestTest < ActiveSupport::TestCase 
    def setup 
    Interest.delete_all 
    Culture.delete_all 
    History.delete_all 
    Nature.delete_all 
    end 

    test "version" do 
    puts "\nMongoid::VERSION:#{Mongoid::VERSION}\nMoped::VERSION:#{Moped::VERSION}" 
    end 
    test "inheritance" do 
    Culture.create(description: "a culture site", coordinates: "40.7577° N, 73.9857° W") 
    History.create(description: "a history site", coordinates: "40.7577° N, 73.9857° W") 
    Nature.create(description: "a nature site", coordinates: "40.7577° N, 73.9857° W") 

    array_type_sites = ["nature", "culture", "history"] 
    @sites = Culture.where(:coordinates => {"$ne" => "", "$ne" => nil}).to_a 

    if array_type_sites.include?("nature") 
     @sitesNature = Nature.where(:coordinates => {"$ne" => "", "$ne" => nil}).to_a 
     @sites += @sitesNature 
    end 
    if array_type_sites.include?("culture") 
     @sitesCulture = Culture.where(:coordinates => {"$ne" => "", "$ne" => nil}).to_a 
     @sites += @sitesCulture 
    end 

    Interest.collection.insert(@sites.collect{|site|site.serializable_hash}) 
    puts 
    pp Interest.all.to_a 
    end 
end

耙測試

Run options: 

# Running tests: 

[1/2] InterestTest#test_inheritance 
[#<Culture _id: 53dfd43b7f11ba43ef000001, description: "a culture site", coordinates: "40.7577° N, 73.9857° W", _type: "Culture">, 
#<History _id: 53dfd43b7f11ba43ef000002, description: "a history site", coordinates: "40.7577° N, 73.9857° W", _type: "History">, 
#<Nature _id: 53dfd43b7f11ba43ef000003, description: "a nature site", coordinates: "40.7577° N, 73.9857° W", _type: "Nature">] 
[2/2] InterestTest#test_version 
Mongoid::VERSION:3.1.6 
Moped::VERSION:1.5.2 
Finished tests in 0.084751s, 23.5985 tests/s, 0.0000 assertions/s. 
2 tests, 0 assertions, 0 failures, 0 errors, 0 skips 

ruby -v: ruby 2.1.1p76 (2014-02-24 revision 45161) [x86_64-darwin12.0]

來源

2014-08-04 18:51:20

Rails/MongoId - 使用條件標準在多個模型上連接多個查詢

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