autosave options in Ruby on Rails

Is there a way to turn OFF autosave in Rails? I don't want modifications to an association to automatically save to the database UNTIL I call save on the parent object.

some_parent.some_children << child #should not save, just adds to the association!

some_parent.save #now parent and children 开发者_如何学运维are saved!

It this possible or am I barking up the wrong tree?

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I think this may be close enough to provide some help.

some_parent.some_children.build({:child_attr1 => 'child_val1'})
some_parent.save # should save the new child as well

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I think you simply need to declare the some_children association with autosave: false