I have a very similar address structure to the one described in this video, but when I use the MorphOne field, the address's addressable_type and addressable_id fields are listed as required. I obviously can't fill out the addressable_id because the related model doesn't exist yet. I'm stumped as to how to fix this.

The key difference between this example and my code is that a customer has many addresses, and has one primary address. and a Business has many addresses and has one primary address. So I am using the morphOne for the primary address and a morphMany for all addresses.

Customer.php nova resource:

public function fieldsForCreate(NovaRequest $request) {
    return [ 
        Select::make('Status', 'status')
            ->options(ClientStatus::getOptions())
            ->default(ClientStatus::ACTIVE->value),
        Text::make('Name')
            ->rules('required', 'max:255'),
        MorphOne::make(
            'Primary Address', 
            'primaryAddress', 
            resource: Address::class)->required(),
        //this morphmany is only on the details view, and it works as expected
        //MorphMany::make('Addresses', 'addresses', Address::class)
    ];
}

Address.php nova resource fields:

return [
    MorphTo::make('Addressable')->types([
        Business::class,
        Customer::class,
    ])->sortable(),
    Text::make('Cross Streets')->sortable()->nullable(),
    /* ... rest of address fields */
];

Using the code as is, the morphOne field on the customer requires the addressable_type and addressable_id to be filled out on creation, but like I said before, since the Customer doesn't exist yet, the fields can't be populated. Any thoughts on how to resolve this issue?

BelongsToMany And Polymorphic Relationships