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体验新版 GitCode,发现更多精彩内容 >>
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253259f3
编写于
9月 16, 2008
作者:
H
Hongli Lai (Phusion)
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差异文件
Add more information about transactions.
上级
86a0e98a
变更
1
隐藏空白更改
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并排
Showing
1 changed file
with
16 addition
and
2 deletion
+16
-2
activerecord/lib/active_record/transactions.rb
activerecord/lib/active_record/transactions.rb
+16
-2
未找到文件。
activerecord/lib/active_record/transactions.rb
浏览文件 @
253259f3
...
...
@@ -25,7 +25,7 @@ def self.included(base)
# have a number of statements that must be executed together or not at all.
# Example:
#
# transaction do
#
ActiveRecord::Base.
transaction do
# david.withdrawal(100)
# mary.deposit(100)
# end
...
...
@@ -40,7 +40,9 @@ def self.included(base)
#
# Though the transaction class method is called on some Active Record class,
# the objects within the transaction block need not all be instances of
# that class.
# that class. This is because transactions are per-database connection, not
# per-model.
#
# In this example a <tt>Balance</tt> record is transactionally saved even
# though <tt>transaction</tt> is called on the <tt>Account</tt> class:
#
...
...
@@ -49,6 +51,14 @@ def self.included(base)
# account.save!
# end
#
# Note that the +transaction+ method is also available as a model instance
# method. For example, you can also do this:
#
# balance.transaction do
# balance.save!
# account.save!
# end
#
# == Transactions are not distributed across database connections
#
# A transaction acts on a single database connection. If you have
...
...
@@ -95,6 +105,7 @@ def transaction(&block)
end
end
# See ActiveRecord::Transactions::ClassMethods for detailed documentation.
def
transaction
(
&
block
)
self
.
class
.
transaction
(
&
block
)
end
...
...
@@ -131,6 +142,9 @@ def rollback_active_record_state!
# Executes +method+ within a transaction and captures its return value as a
# status flag. If the status is true the transaction is committed, otherwise
# a ROLLBACK is issued. In any case the status flag is returned.
#
# This method is available within the context of an ActiveRecord::Base
# instance.
def
with_transaction_returning_status
(
method
,
*
args
)
status
=
nil
transaction
do
...
...
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