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SetNonNullable<BaseType, Keys>

SetNonNullable<BaseType, Keys> = { [Key in keyof BaseType]: Key extends Keys ? NonNullable<BaseType[Key]> : BaseType[Key] }

Defined in: packages/react-querybuilder/src/types/type-fest/set-non-nullable.ts:35

Create a type that makes the given keys non-nullable, where the remaining keys are kept as is.

If no keys are given, all keys will be made non-nullable.

Use-case: You want to define a single model where the only thing that changes is whether or not some or all of the keys are non-nullable.

Type Parameters​

Type ParameterDefault type
BaseType-
Keys extends keyof BaseTypekeyof BaseType

Example​

import type {SetNonNullable} from 'type-fest';

type Foo = {
	a: number | null;
	b: string | undefined;
	c?: boolean | null;
}

type SomeNonNullable = SetNonNullable<Foo, 'b' | 'c'>;
// type SomeNonNullable = {
// 	a: number | null;
// 	b: string; // Can no longer be undefined.
// 	c?: boolean; // Can no longer be null, but is still optional.
// }

type AllNonNullable = SetNonNullable<Foo>;
// type AllNonNullable = {
// 	a: number; // Can no longer be null.
// 	b: string; // Can no longer be undefined.
// 	c?: boolean; // Can no longer be null, but is still optional.
// }
caution

API documentation is generated from the latest commit on the main branch. It may be somewhat inconsistent with official releases of React Query Builder.