firstOrCreate() vs createOrFirst()

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firstOrCreate() vs createOrFirst() image

Laravel v10.20 came out with a brand-new method called createOrFirst(), contributed by Tony Messias, which might be a little confusing because Laravel already had a firstOrCreate(). What are the differences? Why do we need two methods for this? Let's take a look...

createOrFirst()

The new createOrFirst() method is designed to do better in highly concurrent environments and helps reduce race conditions, but requires a unique constraint on the database.

With createOrFirst, we invert this flow and rely on the tables having a UNIQUE constraint. So, first, we attempt to create the record, and if we get an exception back from the database and identify that it's a unique constraint violation, we attempt to find the matching record instead. This way, concurrent processes may rely on the ACID characteristics of the database and never have to worry about that race condition again.

You can find out more details on the pull request.

firstOrCreate()

firstOrCreate was the original method, and here is how it's currently defined in the docs:

The firstOrCreate method will attempt to locate a database record using the given column/value pairs. If the model can not be found in the database, a record will be inserted with the attributes resulting from merging the first array argument with the optional second array argument

What is also cool about this new method is that now the original firstOrCreate method uses the new createOrFirst one under the hood. So it goes by:

  1. attempts to find
  2. if missing, attempts to create
  3. if UNIQUE violation happens, attempt another find because we ran into that race condition

Which to use?

I would say in most apps, the original firstOrCreate is fine, and you'd really only want to use createOrFirst when you are in a concurrent environment with tons of traffic.

Related: Laravel firstOrNew, firstOrCreate, firstOr, and updateOrCreate methods.

Eric L. Barnes photo

Eric is the creator of Laravel News and has been covering Laravel since 2012.

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