https://www.prisma.io/docs/reference/service-configuration/data-model/data-modelling-(sdl)-eiroozae8u/#required-relations

Note that a to-many relation field is always set to required. For example, a field that contains many user addresses always uses the type [Address!]! and can never be of type [Address!]. The reason is that in case the field doesn't contain any nodes, [] will be returned, which is not null.

I'd also love some clarification on this. I understand why

[Address]!

is important. I don't understand the benefits of

[Address!]!

though.

[Address]!

means you have a guarantee of an array, but that array could have null values in it

Ah. That makes perfect sense. Thanks for taking the time to respond 🙂

@Avi Block so

[Address!]!

does not mean that there's always at least one item in the array (of type

Address

? It just means that if there is an item, it must be an

Address

?

The outer ! means that value can't be null...so you're guaranteed that there will be an array. The inner ! guarantees that in the array will only be Addresses, and not also nulls

makes total sense 🙂 thanks!