fix(zod): DateTime field inference for z.input

[sanny-io]

Closes #2673

Summary by CodeRabbit

• Bug Fixes

  • Improved type checking accuracy for DateTime fields in generated schemas, ensuring correct type inference during schema generation.

• Tests

  • Added type-level validation tests for DateTime field type inference to extend coverage of scalar type handling.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 1922d702-6b7c-4207-b591-98277578c317

📥 Commits

Reviewing files that changed from the base of the PR and between a43dff5 and 3c9b946.

📒 Files selected for processing (2)

• packages/zod/src/types.ts
• packages/zod/test/factory.test.ts

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📝 Walkthrough

Walkthrough

DateTime scalar type mapping changed from generic z.ZodType<Date> to concrete z.ZodDate to enable proper z.input type inference. A test added to validate the birthdate field correctly infers input type as Date | null | undefined.

Changes

DateTime Type Inference Fix

Layer / File(s)	Summary
DateTime scalar type mapping specification packages/zod/src/types.ts	FieldTypeZodMap.DateTime now maps to z.ZodDate instead of generic z.ZodType<Date>, providing concrete type information for z.input inference.
Input type inference validation packages/zod/test/factory.test.ts	New test verifies makeModelSchema('User') correctly infers the birthdate field input type as Date | null | undefined using z.input<typeof _userSchema>.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A Zod type tweak, oh what a sight!
From generic woes to concrete light,
DateTime now speaks with clarity true,
Input types shine, no more "unknown" hue—
React Hook Form dances, our types align right! 🎉

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the main change: fixing DateTime field inference for z.input by updating the Zod type mapping from z.ZodType to z.ZodDate.
Linked Issues check	✅ Passed	The PR directly addresses issue #2673 by updating FieldTypeZodMap to use z.ZodDate instead of z.ZodType, enabling correct z.input inference for DateTime fields, and adds tests to verify the fix.
Out of Scope Changes check	✅ Passed	All changes are scoped to addressing issue #2673: updating the DateTime type mapping and adding corresponding test coverage, with no unrelated modifications.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

Warning

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🔧 ESLint

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packages/zod/src/types.ts

ESLint skipped: missing config or dependency (missing-dependency). The ESLint configuration references a package that is not available in the sandbox.

packages/zod/test/factory.test.ts

ESLint skipped: the ESLint configuration for this file references a package that is not available in the sandbox.

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