Switching from null to string field with onUpdate or onEdit validation can fail

[zcr1]

Background - I have a field that accepts null or the string YYYY-MM-DD

If you have a field with ['null', 'string'] and an initial value of null then changing the type to string both onUpdate and onEdit are called with the string value "null". If this fails the field validation then an error will be shown and editing is exited and returns the field back to null. Which means the user is not able to change the type.

I guess one solution is onEdit should not be called when the type changes, only when a user is done editing. I can also probably figure out a workaround to set a valid value instead when currentValue === null && newValue === 'null'. Is there anything else I am missing?

Thanks!

[CarlosNZ]

You should be able to specify a valid value using the defaultValue prop. It can also be a function so it can return a different value depending on type.

Another option is to use one of the available "Custom components" for Date, or just use it as a reference to create your own: #193

This will allow you to specify an appropriate default for dates or date strings.

Hope that helps, thanks for the comment.

[zcr1]

Thanks for the suggestions. I tried using the defaultValue prop but it is not being called when changing the data type, only when adding new keys. I'll try custom component or add some special handling inside onEdit.

Cheers

[CarlosNZ]

I tried using the defaultValue prop but it is not being called when changing the data type

Ah interesting, I think it should be -- I'll look into it.