fix(zod): DateTime, Bytes, and Decimal field inference for z.input

[sanny-io]

Closes #2673

Summary by CodeRabbit

• Bug Fixes

  • DateTime fields now validate and infer as actual Date values for correct runtime/input handling.

• New Features

  • Added concrete validators for decimal and binary (bytes) scalars for stricter validation and clearer inputs.

• Tests

  • Added type-level tests covering input types for date, decimal, and binary fields.

[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: 8602e6a8-3d07-40e0-89ee-300b45f03eca

📥 Commits

Reviewing files that changed from the base of the PR and between 3e80f6a and f61fb77.

📒 Files selected for processing (2)

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

🚧 Files skipped from review as they are similar to previous changes (2)

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

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📝 Walkthrough

Walkthrough

Adds exported Zod helper schemas decimalSchema and bytesSchema, updates FieldTypeZodMap to use concrete Zod types (DateTime -> z.ZodDate, Decimal/Bytes -> typeof decimalSchema/typeof bytesSchema), and adds a type-level test asserting refined input types.

Changes

Zod scalar schema updates

Layer / File(s)	Summary
Add decimalSchema and bytesSchema packages/zod/src/utils.ts	Exports decimalSchema (custom Decimal predicate) and bytesSchema (Uint8Array instanceof check).
FieldTypeZodMap uses concrete schemas packages/zod/src/types.ts	Imports decimalSchema/bytesSchema; FieldTypeZodMap.DateTime maps to z.ZodDate, Decimal/Bytes map to typeof decimalSchema/typeof bytesSchema.
Refine tests for input types packages/zod/test/factory.test.ts	Adds a type-level test asserting z.input<typeof _userSchema> for birthdate, balance, and avatar input types.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

🐇 I hopped through schemas, neat and small,
I shaped the bytes and decimals all,
DateTime now answers clear and straight,
Inputs align — no unknown state,
A tiny hop for types, a joyful call.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title directly describes the main fix: improving DateTime, Bytes, and Decimal field inference for z.input, which matches the core changes and objectives.
Linked Issues check	✅ Passed	The PR addresses issue #2673 by updating FieldTypeZodMap to use concrete Zod types (z.ZodDate, decimalSchema, bytesSchema) enabling correct z.input inference for DateTime, Bytes, and Decimal fields.
Out of Scope Changes check	✅ Passed	All changes are directly scoped to fixing DateTime, Bytes, and Decimal field type mappings; the type test addition validates the fix without introducing unrelated changes.

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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/utils.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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[sanny-io]

The cast for bytesSchema is because otherwise the underlying value is inferred as uint8Array<ArrayBuffer> rather than uint8Array<ArrayBufferLike>, which is the default generic parameter of uint8Array and is the one present in the existing tests.