Set action input default values from zod if FormData key is not present

[billy-le]

Changes

• What does this change?

Resolves #11659

This changes formDataToObject to allow default values to be set from zod.

Testing

Add tests to capture changes. I ran unit tests for this specific change and it passes. Not sure if the whole project tests are working correctly since I was getting some failures.

Docs

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[billy-le]

Adding some context on why I added this:

I was working on server actions and I have a file input that accepts multiple files. I'm using zod with a property of z.array(z.instanceOf(File)).default([]) Whenever I submitted the FormData to my action, I kept getting an error because the formDataToObject validator skipped over instances of z.ZodDefault and where it was expecting an array, it converted to an object by going to handleFormDataGet.

It looks like the z.ZodDefault wasn't accounted for so I thought I would add this bit.

There might be a case when someone could chain a bunch of z...default('').default('') and it will produce the same error that I had but it seems minor at the moment.

[bholmesdev]

Sorry, that was my (de)fault for not checking against default validators. Great fix! Just a couple comments

[billy-le]

Hey @bholmesdev, I've updated my code. Let me know if there's anything you think I might have missed!