Schema with Lists and Non-Null
Learn what’s Lists and Non-null type modifiers in GraphQL.
The only types we can define in GraphQL are object, scalars, and enums. But when we use the non-null modifier in our query or fields, we can also register additional type modifiers that affect the validation of the values. Let’s look at an example:
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type Pizza {id: Int!pizza: String!stock: Int!toppings: [Topping!]!}
Non-null modifier type
In the example above, pizza is a field with a String type. If we mark it as non-null by adding an exclamation mark (!) after the type name, our server will return a non-null value. If, for some reason, the ...