Type inference for validation errors didn't include _errors for objects, only for arrays.

Author: ciscoheat

CHANGELOG.md

@@ -5,6 +5,12 @@ Headlines: Added, Changed, Deprecated, Removed, Fixed, Security
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- Type inference for validation errors didn't include `_errors` for objects, only for arrays.
+
 ## [2.15.2] - 2024-06-26
 
 ### Changed

src/lib/superStruct.ts

@@ -4,7 +4,7 @@ export type SuperStructArray<T extends Record<string, unknown>, Data, ArrayData
 	// eslint-disable-next-line @typescript-eslint/no-explicit-any
 	[Property in AllKeys<T>]?: [T] extends [any]
 		? NonNullable<T[Property]> extends Record<string, unknown>
-			? SuperStructArray<MergeUnion<NonNullable<T[Property]>>, Data, ArrayData>
+			? ArrayData & SuperStructArray<MergeUnion<NonNullable<T[Property]>>, Data, ArrayData>
 			: NonNullable<T[Property]> extends (infer A)[]
 				? ArrayData &
 						Record<

src/tests/errors.test.ts

@@ -113,10 +113,29 @@ describe('Mapping defaults to invalid data', () => {
 
 describe('The ValidationErrors type', () => {
 	it('should work as expected', () => {
-		const data = { name: '' };
-		const name = 'name' as keyof typeof data;
+		const schema = z.object({
+			name: z.string().min(1),
+			birthDate: z
+				.object({
+					year: z.number(),
+					month: z.number(),
+					day: z.number()
+				})
+				.refine(() => {
+					// Custom validation logic for the date
+					return false; // Assuming the validation fails
+				}, 'Invalid Date')
+		});
+
+		const data: z.infer<typeof schema> = { name: '', birthDate: { year: 0, month: 0, day: 0 } };
 		const errors: ValidationErrors<typeof data> = {};
-		const test: string[] = errors[name] ?? [];
-		expect(test).toEqual([]);
+
+		const birthErrors: string[] | undefined = errors.birthDate?._errors;
+		const name: string[] = errors['name'] ?? [];
+		const year: string[] | undefined = errors.birthDate?.year;
+
+		expect(name).toEqual([]);
+		expect(year).toBeUndefined();
+		expect(birthErrors).toBeUndefined();
 	});
 });