Databases
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PO
 

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    <p>Have you tried overwriting create/save and their destructive versions? ActiveRecord::Base.create, ActiveRecord::Base.save and their destructive versions are wrapped in a transaction, they're also what trigger callbacks and validations. If you're overriding it, only the stuff done by super will be part of a transaction. If you need yo run validations before then you can explicitly call valid to run them all.</p> <p>Example:</p> <pre><code>before_create :before_create_actions_that_can_be_rolled_back def create if valid? &amp;&amp; before_create_actions_that_wont_be_rolled_back super end end def before_create_actions_that_wont_be_rolled_back # exactly what it sounds like end def before_create_actions_that_can_be_rolled_back # exactly what it sounds like end </code></pre> <p>Caveat: With these modifications the methods will be called in this order:</p> <ol start="2"> <li>before validation (on_create)</li> <li>validate</li> <li>after validation (on_create)</li> <li>before_create_actions_that_wont_be_rolled_back</li> <li>before validation (on_create)</li> <li>validate</li> <li>after validation (on_create)</li> <li>before save callbacks</li> <li>before create callbacks</li> <li>record is created</li> <li>after create callbacks</li> <li>after save callbacks</li> </ol> <p>If any validations fail or if any callback returns false in steps 5-12 the database will be rolled back to the state it was in before step 5. </p> <p>If valid? fails, or before_create_actions_that_wont_be_rolled_back fails than the whole chain will be halted.</p>
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    1. POHow do you prevent database changes inside a Rails ActiveRecord before_create filter from getting rolled back when it returns false?
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    1. COThat's clever and might make a great Plan B but I really need to apply the updates at the before_create step (#6 in your list) after validation. Thanks.
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      1. USTeflon Ted
    2. COThere's no reason you can't call valid? explicitly. That will ensure all validations pass before doing your actions that should not be rolled back. Of course it means validations will be run twice. Regardless the solution has been updated to address your concern.
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