我遵循了这些升级说明：http ://railscasts.com/episodes/318-upgrading-to-rails-3-2
这是我的三个小的升级更改：
(1) 宝石文件
-gem 'rails', '3.1.0'
+gem 'rails', '3.2.0'
-gem 'rack', '1.3.3'
+#gem 'rack', '1.3.3'
group :assets do
- gem 'sass-rails', ' ~> 3.1.0'
- gem 'coffee-rails', '~> 3.1.0'
- gem 'uglifier'
+ gem 'sass-rails', ' ~> 3.2.3'
+ gem 'coffee-rails', '~> 3.2.1'
+ gem 'uglifier', ' >=1.0.3'
gem 'asset_sync'
end
(2) config/environments/development.rb
+ config.active_record.mass_assignment_sanitizer = :strict
+ config.active_record.auto_explain_threshold_in_seconds = 0.5
(3) 配置/环境/test.rb
- config.assets.allow_debugging = true
+ config.active_record.mass_assignment_sanitizer = :strict
在升级之前，我的测试如下所示（每个测试不到一秒）：
...
StockroomTest:
PASS stockroom must have a name (0.03s)
PASS stockroom name must be unique (0.01s)
PASS stockroom with name is valid (0.00s)
...
Finished in 1.604118 seconds.
29 tests, 90 assertions, 0 failures, 0 errors, 0 skips
...
StockroomsControllerTest:
PASS should create stockroom (0.04s)
PASS should destroy stockroom (0.02s)
PASS should get edit (0.14s)
PASS should get index (0.11s)
PASS should get new (0.03s)
PASS should not destroy stockroom (0.04s)
PASS should show stockroom (0.13s)
PASS should update stockroom (0.02s)
...
Finished in 12.572911 seconds.
115 tests, 166 assertions, 0 failures, 0 errors, 0 skips
...
MiscellaneousTest:
PASS get campaigns#index should redirect to newsletters#index (1.83s)
PASS get /campaigns should redirect to / when logged out (0.06s)
Finished in 1.793070 seconds.
2 tests, 3 assertions, 0 failures, 0 errors, 0 skips
之后（每次测试需要超过 1 秒）：
StockroomTest:
PASS stockroom must have a name (1.29s)
PASS stockroom name must be unique (1.30s)
PASS stockroom with name is valid (1.27s)
...
Finished in 41.135808 seconds.
29 tests, 90 assertions, 0 failures, 0 errors, 0 skips
...
StockroomsControllerTest:
PASS should create stockroom (1.30s)
PASS should destroy stockroom (1.29s)
PASS should get edit (1.33s)
PASS should get index (1.43s)
PASS should get new (1.41s)
PASS should not destroy stockroom (1.31s)
PASS should show stockroom (1.36s)
PASS should update stockroom (1.31s)
...
Finished in 161.803235 seconds.
115 tests, 166 assertions, 0 failures, 0 errors, 0 skips
...
MiscellaneousTest:
PASS get /campaigns should redirect to /newsletters when logged in (5.27s)
PASS get /campaigns should redirect to / when logged out (1.67s)
Finished in 7.034593 seconds.
2 tests, 3 assertions, 0 failures, 0 errors, 0 skips
以下是上述单元测试之一的示例。现在（升级后）运行大约需要 1.3s，而之前不到 0.01s。
测试/单元/stockroom_test.rb
require 'test_helper'
class StockroomTest < ActiveSupport::TestCase
fixtures :stockrooms
test "stockroom with name is valid" do
assert stockrooms(:wine_cellar).valid?, 'tried new wine_cellar'
end
我知道固定装置不受欢迎，我确实打算认真研究工厂，但目前这是我的困境。这是相关的夹具：
测试/夹具/stockrooms.yml
wine_cellar:
id: 1
name: wine cellar
仅有的两个验证Stockroom是presence和uniqueness。
注意：我在同一台机器上运行另一个 rails 应用程序，尽管它正在运行 rails 3.2.5，并且几乎相同的单元测试（相同的两个验证上的相同断言）在 0.465489 秒（不到半秒）内完成。
以下是上述“具有名称的库房有效”测试的测试日志的相关部分：
(0.9ms) SET FOREIGN_KEY_CHECKS = 1
(0.2ms) BEGIN
(84.8ms) BEGIN
(82.3ms) BEGIN
(83.4ms) BEGIN
(79.2ms) BEGIN
(82.1ms) BEGIN
Stockroom Load (0.4ms) SELECT `stockrooms`.* FROM `stockrooms` WHERE `stockrooms`.`id` = 1 LIMIT 1
Stockroom Exists (0.6ms) SELECT 1 AS one FROM `stockrooms` WHERE (`stockrooms`.`name` = BINARY 'wine cellar' AND `stockrooms`.`id` != 1) LIMIT 1
(0.1ms) ROLLBACK
(90.9ms) ROLLBACK
(85.7ms) ROLLBACK
(90.7ms) ROLLBACK
(81.4ms) ROLLBACK
(85.4ms) ROLLBACK
为了比较，这是我的 rails3.2.5应用程序中的“等效”测试：
(0.2ms) SET FOREIGN_KEY_CHECKS = 1
(0.1ms) BEGIN
Email Load (0.4ms) SELECT `emails`.* FROM `emails` WHERE `emails`.`id` = 980190962 LIMIT 1
Email Exists (2.8ms) SELECT 1 FROM `emails` WHERE (`emails`.`email` = BINARY 'MyString' AND `emails`.`id` != 980190962) LIMIT 1
(0.2ms) ROLLBACK