Ruby-on-rails 多个数据库的测试和database_cleaner

tests and database_cleaner for multiple databases

提问by HannesFostie

We have a Mailbox model which uses a secondary DB to which another mail app also connects. This is called using

我们有一个邮箱模型，它使用另一个邮件应用程序也连接到的辅助数据库。这称为使用

establish_connection :mail_database

Now, I suppose I could attempt to wrap that in an ifstatement so it uses a different connection for the test environment, but I'm wondering how I could keep this database clean, preferably using database_cleaner which we already use for the 'regular' database.

现在，我想我可以尝试将它包装在一个if语句中，以便它为测试环境使用不同的连接，但我想知道如何保持这个数据库干净，最好使用我们已经用于“常规”数据库的 database_cleaner .

I hope someone can nudge me in the right direction.

我希望有人能将我推向正确的方向。

采纳答案by Lars Schirrmeister

I have a rails3.2.10 application tested with rspec (2.12.0) and using database_cleaner (0.9.1 f4b44bb) having two database connections for mysql.

我有一个使用 rspec (2.12.0) 和使用 database_cleaner (0.9.1 f4b44bb) 测试的 rails3.2.10 应用程序，它有两个用于 mysql 的数据库连接。

These are set in the database.ymlsomething like:

这些在database.yml中设置如下：

test:
  ...
  database: my_app_test

test_my_second_connection:
  ...
  database: my_second_connection_test

The second database is connected in the model class with establish connection.

第二个数据库通过建立连接在模型类中连接。

I was able to use the following settings in my spec/spec_helper.rbfile according to the manual of database_cleaner:

根据database_cleaner的手册，我能够在我的spec/spec_helper.rb文件中使用以下设置：

require 'database_cleaner'

RSpec.configure do |config|

  config.before(:suite) do
    DatabaseCleaner.strategy = :transaction
    DatabaseCleaner[:active_record,{:connection => :test_my_second_connection}].strategy = :transaction
  end

  config.before(:each) do
    DatabaseCleaner.start
    DatabaseCleaner[:active_record,{:connection => :test_my_second_connection}].start
  end

  config.after(:each) do
    DatabaseCleaner.clean
    DatabaseCleaner[:active_record,{:connection => :test_my_second_connection}].clean
  end

end

Additionally I have to use for some parts of the test suite non-transactional fixtures. So I had to add the meta information :db_truncate => truein my specs and the settings like this in order to change the strategy in test run:

此外，我必须使用测试套件的某些部分非事务性装置。所以我不得不在我的规范和这样的设置中添加元信息:db_truncate => true以更改测试运行中的策略：

config.before(:suite) do
  DatabaseCleaner.strategy = :transaction
  DatabaseCleaner[:active_record,{:connection => :test_my_second_connection}].strategy = :transaction
end

config.before(:each) do
  if example.metadata[:db_truncation]
    DatabaseCleaner.strategy = :truncation
    DatabaseCleaner[:active_record,{:connection => :test_my_second_connection}].strategy = :truncation
  else
    DatabaseCleaner.start
    DatabaseCleaner[:active_record,{:connection => :test_my_second_connection}].start
  end
end

config.after(:each) do
  DatabaseCleaner.clean
  DatabaseCleaner[:active_record,{:connection => :test_my_second_connection}].clean
  if example.metadata[:db_truncation]
    DatabaseCleaner.strategy = :transaction
    DatabaseCleaner[:active_record,{:connection => :test_my_second_connection}].strategy = :transaction
  end
end

回答by Ganesh Shrivas

****set database to clean by database cleaner in rails:-****
config.before(:suite) do
   DatabaseCleaner[:active_record, :connection => :test].clean_with(:truncation)
end

config.before(:each) do
  DatabaseCleaner[:active_record, :connection => :test].strategy = :transaction
end

config.before(:each) do
  DatabaseCleaner[:active_record, :connection => :test].start
end

config.after(:each) do
  DatabaseCleaner[:active_record, :connection => :test].clean
end