MongoMapper使用10gen Ruby驅動程序,而MongoMapper :: Document提供對底層驅動程序對象的訪問。
以下工作測試顯示您可以使用Model.collection.update來執行您想要的操作,以便爲模型「模型」重命名一個字段。如果要更新/重命名多個文檔,請確保使用:multi => true選項進行更新。
應用程序/模型/ model.rb
class Model
include MongoMapper::Document
end
測試/單位/ model_test.rb
require 'test_helper'
class ModelTest < ActiveSupport::TestCase
def setup
Model.remove
end
test "rename" do
puts "Model.collection.class: #{Model.collection.class}"
puts "Model.database.class: #{Model.database.class}"
Model.create('old_name' => 'name value 0', 'another_key' => 'another value 0')
Model.create('old_name' => 'name value 1', 'another_key' => 'another value 1')
assert_equal(2, Model.where('old_name' => { '$exists' => true }).count)
Model.collection.update({}, { '$rename' => { 'old_name' => 'new_name' } }, :multi => true)
assert_equal(0, Model.where('old_name' => { '$exists' => true }).count)
p Model.all
end
end
$耙測試
Rack::File headers parameter replaces cache_control after Rack 1.5.
Run options:
# Running tests:
Model.collection.class: Mongo::Collection
Model.database.class: Mongo::DB
[DEPRECATED] The 'safe' write concern option has been deprecated in favor of 'w'.
[#<Model _id: BSON::ObjectId('5101809d7f11ba1256000001'), another_key: "another value 0", new_name: "name value 0">, #<Model _id: BSON::ObjectId('5101809d7f11ba1256000002'), another_key: "another value 1", new_name: "name value 1">]
.
Finished tests in 0.s, 81.0110 tests/s, 162.0220 assertions/s.
1 tests, 2 assertions, 0 failures, 0 errors, 0 skips