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Size: 1015 Bytes
Versions: 5
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Stored size: 1015 Bytes
Contents
module DbMod
# Module which provides transaction blocks for db_mod
# enabled classes.
module Transaction
protected
# Create a transaction on the db_mod database connection.
# Calls +BEGIN+ then yields to the given block. Calls
# +COMMIT+ once the block yields, or +ROLLBACK+ if the
# block raises an exception.
#
# Not thread safe. May not be called from inside another
# transaction.
# @return [Object] the result of +yield+
def transaction
start_transaction!
result = yield
query 'COMMIT'
result
rescue
query 'ROLLBACK'
raise
ensure
end_transaction!
end
private
# Start the database transaction, or fail if
# one is already open.
def start_transaction!
fail DbMod::Exceptions::AlreadyInTransaction if @in_transaction
@in_transaction = true
query 'BEGIN'
end
# End the database transaction
def end_transaction!
@in_transaction = false
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems