field.move causes an error when applied to two objects with different fields

[dekhanov]

Bug report

What is the current behavior?

field.move causes an error at the getValidators function when applied to two objects with different fields

See the demo: https://codesandbox.io/s/x94j811oj4
Click a swap button

What is the expected behavior?

To swap objects with no error

What's your environment?

See the CodeSandBox link

[luishdz1010]

Any workaround]? I'm hitting this with nested array fields...

[HawiCaesar]

I managed to make a simple workaround borrowing from @dekhanov example. I think it can be made better though I still find it readable. Here is the demo.

This came with the inspiration of this blog. Credits to Erik Rasmussen for explaining the mutator concept to detail.

[dekhanov]

Hi, @HawiCaesar! I,m afraid that what you have implemented is a swap mutator, not move.
There is no difference between them in the case of two elements, but it will not work correctly if the number of elements more then two.

@luishdz1010
To workaround the issue you can try the first implementation of the move mutator from here: final-form/final-form-arrays@4750506#diff-2dda6a27cd50646eb66a941de8781bcf

In this case you will face this issue: final-form/final-form-arrays#10
It's just a lesser of two evils.