When can return type of generated GraphQL queries be null?

[amaster507 (Anthony Master)]

I think this goes along the lines of my clarification for my own purpose of the !:

@amaster507

As I understand the specification:

• ids: [ID] means that the input does not have to exist, and if it is an array then it can be an empty array.
• ids: [ID]! means that the input does have to exist (single item not in list gets converted to a list of itself), and it can be an empty array
• ids: [ID!] means that the input does not have to exist, but if it does then it cannot be an empty array
• ids: [ID!]! means that the input does have to exist, and it cannot be an empty array.

But I did not take an account for null

@dpeek

when could the elements inside the array be null?

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It appears my logic may be off

GraphQL: Non-nullable array/list

and another reply:

They can all be empty arrays, but [ID] can contain elements that are null whereas [ID!] can’t.