feat: delegate client typing

[ymc9]

No description provided.

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

✨ Finishing Touches

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/delegate-typing

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

🪧 Tips

Chat

There are 3 ways to chat with CodeRabbit:

• Review comments: Directly reply to a review comment made by CodeRabbit. Example:
  • I pushed a fix in commit <commit_id>, please review it.
  • Explain this complex logic.
  • Open a follow-up GitHub issue for this discussion.
• Files and specific lines of code (under the "Files changed" tab): Tag @coderabbitai in a new review comment at the desired location with your query. Examples:
  • @coderabbitai explain this code block.
  • @coderabbitai modularize this function.
• PR comments: Tag @coderabbitai in a new PR comment to ask questions about the PR branch. For the best results, please provide a very specific query, as very limited context is provided in this mode. Examples:
  • @coderabbitai gather interesting stats about this repository and render them as a table. Additionally, render a pie chart showing the language distribution in the codebase.
  • @coderabbitai read src/utils.ts and explain its main purpose.
  • @coderabbitai read the files in the src/scheduler package and generate a class diagram using mermaid and a README in the markdown format.
  • @coderabbitai help me debug CodeRabbit configuration file.

Support

Need help? Create a ticket on our support page for assistance with any issues or questions.

Note: Be mindful of the bot's finite context window. It's strongly recommended to break down tasks such as reading entire modules into smaller chunks. For a focused discussion, use review comments to chat about specific files and their changes, instead of using the PR comments.

CodeRabbit Commands (Invoked using PR comments)

• @coderabbitai pause to pause the reviews on a PR.
• @coderabbitai resume to resume the paused reviews.
• @coderabbitai review to trigger an incremental review. This is useful when automatic reviews are disabled for the repository.
• @coderabbitai full review to do a full review from scratch and review all the files again.
• @coderabbitai summary to regenerate the summary of the PR.
• @coderabbitai generate docstrings to generate docstrings for this PR.
• @coderabbitai generate sequence diagram to generate a sequence diagram of the changes in this PR.
• @coderabbitai generate unit tests to generate unit tests for this PR.
• @coderabbitai resolve resolve all the CodeRabbit review comments.
• @coderabbitai configuration to show the current CodeRabbit configuration for the repository.
• @coderabbitai help to get help.

Other keywords and placeholders

• Add @coderabbitai ignore anywhere in the PR description to prevent this PR from being reviewed.
• Add @coderabbitai summary to generate the high-level summary at a specific location in the PR description.
• Add @coderabbitai anywhere in the PR title to generate the title automatically.

Documentation and Community

• Visit our Documentation for detailed information on how to use CodeRabbit.
• Join our Discord Community to get help, request features, and share feedback.
• Follow us on X/Twitter for updates and announcements.

[claude]

Claude finished @ymc9's task —— View job

---

PR Review: Delegate Client Typing

This PR implements delegate model typing with discriminated unions - a sophisticated feature that allows model inheritance with proper TypeScript type safety.

Review Progress

• Examine core implementation changes
• Analyze client contract modifications
• Review CRUD types updates
• Check test coverage and quality
• Assess performance and security implications
• Provide comprehensive feedback

✅ Strengths

1. Excellent Type Safety Implementation

• Discriminated Union Types: The implementation correctly generates discriminated union types for delegate models (packages/runtime/src/client/crud-types.ts:58-79)
• Proper Type Guards: TypeScript can correctly narrow types using discriminator fields (e.g., assetType === 'Video')
• Compile-Time Restrictions: Prevents creation of abstract delegate models and assignment to discriminator fields

2. Comprehensive Test Coverage

• Type Checking Tests: Excellent compile-time verification in packages/runtime/test/schemas/delegate/typecheck.ts
• Schema Validation: Complete test schema with proper inheritance hierarchy
• Edge Case Coverage: Tests cover creation restrictions, discriminator field assignments, and query builder behavior

3. Well-Architected Design

• Clean Separation: Query builder API correctly excludes inherited fields (packages/runtime/src/client/query-builder.ts:27-29)
• Consistent Restrictions: Properly blocks unsupported operations across all CRUD methods
• Schema Generation: Proper handling of delegate attributes and field origins in TypeScript generation

⚠️ Areas for Improvement

1. Code Quality Issues

Complex Type Definitions (packages/runtime/src/client/crud-types.ts:72-79)

type DelegateUnionResult<...> = SubModel extends string 
    ? DefaultModelResult<Schema, SubModel, Omit> & { [K in GetModelDiscriminator<Schema, Model>]: SubModel }
    : never;

• Issue: Highly complex conditional types that are difficult to understand and maintain
• Recommendation: Consider breaking down into smaller, well-documented utility types with clear naming

Repetitive Exclusion Logic (packages/runtime/src/client/crud-types.ts:655-657, 845-847)

// Repeated pattern across multiple locations
FieldIsDelegateRelation<Schema, Model, Field> extends true 
    ? 'create' | 'createMany' | 'connectOrCreate' | 'upsert' 
    : never

• Recommendation: Extract this exclusion logic into a reusable utility type

2. Performance Considerations

TypeScript Compilation Performance

• Issue: Deep conditional types and extensive union distributions may slow TypeScript compilation
• Impact: Complex delegate hierarchies could affect IDE responsiveness
• Recommendation: Consider caching frequently used type computations or simplifying type complexity where possible

3. Documentation Gaps

Missing JSDoc for Key Types (packages/runtime/src/client/crud-types.ts:72)

type DelegateUnionResult<...> = // No documentation

• Recommendation: Add comprehensive JSDoc comments explaining the delegate union type behavior

Schema Attribute Documentation

• Missing: Clear documentation of @@delegate attribute usage and discriminator field requirements
• Recommendation: Add inline comments explaining the delegate model constraints

4. Potential Runtime Issues

Error Messages (packages/runtime/src/client/client-impl.ts:341)

const model = Object.keys(client.$schema.models).find((m) => m.toLowerCase() === prop.toLowerCase());

• Issue: Case-insensitive model lookup could be confusing for delegate model hierarchies
• Recommendation: Ensure error messages clearly distinguish between delegate and concrete models

🔒 Security Assessment

✅ No Security Concerns Identified

• Delegate restrictions are properly enforced at the type level
• No exposure of discriminator field manipulation
• Query builder access controls are maintained

🚀 Performance Impact

Minimal Runtime Impact

• Most restrictions are compile-time only
• Discriminated unions use TypeScript's built-in optimization
• Query generation remains efficient

📋 Test Coverage Assessment

Excellent Coverage

• ✅ Comprehensive type checking tests
• ✅ Edge case scenarios covered
• ✅ Integration with existing ORM operations
• ✅ Query builder compatibility verified

🎯 Recommendations

High Priority

1. Simplify Complex Types: Break down DelegateUnionResult and related types into smaller, documented utilities
2. Add JSDoc Documentation: Document key delegate-related types and their behavior
3. Extract Repeated Logic: Create reusable utility types for delegate operation exclusions

Medium Priority

1. Performance Testing: Benchmark TypeScript compilation performance with deeply nested delegate hierarchies
2. Error Message Enhancement: Improve error messages to clearly indicate delegate model restrictions
3. Schema Validation: Consider runtime validation of delegate model constraints

Low Priority

1. Code Organization: Consider moving delegate-specific types to a separate module for better organization

🏆 Overall Assessment

This is a high-quality implementation of a complex TypeScript feature. The delegate model typing system is well-designed, thoroughly tested, and provides excellent type safety. While there are opportunities to improve code clarity and documentation, the core implementation is solid and ready for production use.

Score: 8.5/10 - Excellent implementation with room for minor improvements in code clarity and documentation.

---

[Copilot]

Pull Request Overview

This PR implements delegate client typing functionality, extending the ZenStack framework to support delegate model patterns with proper TypeScript typing and runtime behavior.

• Adds schema generation support for delegate models with discriminator fields and sub-models
• Implements TypeScript type system support for delegate unions and discriminated types
• Restricts operations on delegate models to prevent invalid creation/update patterns

Reviewed Changes

Copilot reviewed 14 out of 15 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
turbo.json	Adds "watch" task configuration for development workflow
packages/sdk/src/ts-schema-generator.ts	Implements core schema generation logic for delegate models, discriminator fields, and sub-model tracking
packages/sdk/src/schema/schema.ts	Extends schema type definitions with delegate model metadata and discriminator field support
packages/runtime/test/schemas/delegate/*	Adds comprehensive test schema and type checking for delegate model functionality
packages/runtime/src/client/query-builder.ts	Filters out inherited fields from delegate base models in query builder
packages/runtime/src/client/plugin.ts	Updates plugin hook interface to include client reference
packages/runtime/src/client/crud-types.ts	Implements delegate union result types and restricts operations on discriminator fields
packages/runtime/src/client/contract.ts	Excludes unsupported operations from delegate model interfaces
packages/runtime/src/client/client-impl.ts	Updates operation hook implementation for proper typing
.vscode/tasks.json	Updates build tasks and adds PR submission task

Comments suppressed due to low confidence (1)

packages/runtime/src/client/plugin.ts:198

• This commented-out parameter should be removed rather than left as a comment. Dead code comments reduce code readability and should be cleaned up.

        args: Parameters<ModelOperations<Schema, Model>[Operation]>[0],

[claude]

Claude finished @ymc9's task —— View job

---

PR Review: Delegate Client Typing

This PR implements delegate model typing with discriminated unions - a sophisticated feature that allows model inheritance with proper TypeScript type safety.

Review Progress

• Examine core implementation changes
• Analyze client contract modifications
• Review CRUD types updates
• Check test coverage and quality
• Assess performance and security implications
• Provide comprehensive feedback

✅ Strengths

1. Excellent Type Safety Implementation

• Discriminated Union Types: The implementation correctly generates discriminated union types for delegate models (packages/runtime/src/client/crud-types.ts:58-79)
• Proper Type Guards: TypeScript can correctly narrow types using discriminator fields (e.g., assetType === 'Video')
• Compile-Time Restrictions: Prevents creation of abstract delegate models and assignment to discriminator fields

2. Comprehensive Test Coverage

• Type Checking Tests: Excellent compile-time verification in packages/runtime/test/schemas/delegate/typecheck.ts
• Schema Validation: Complete test schema with proper inheritance hierarchy
• Edge Case Coverage: Tests cover creation restrictions, discriminator field assignments, and query builder behavior

3. Well-Architected Design

• Clean Separation: Query builder API correctly excludes inherited fields (packages/runtime/src/client/query-builder.ts:27-29)
• Consistent Restrictions: Properly blocks unsupported operations across all CRUD methods
• Schema Generation: Proper handling of delegate attributes and field origins in TypeScript generation

⚠️ Areas for Improvement

1. Code Quality Issues

Complex Type Definitions (packages/runtime/src/client/crud-types.ts:72-79)

type DelegateUnionResult<...> = SubModel extends string 
    ? DefaultModelResult<Schema, SubModel, Omit> & { [K in GetModelDiscriminator<Schema, Model>]: SubModel }
    : never;

• Issue: Highly complex conditional types that are difficult to understand and maintain
• Recommendation: Consider breaking down into smaller, well-documented utility types with clear naming

Repetitive Exclusion Logic (packages/runtime/src/client/crud-types.ts:655-657, 845-847)

// Repeated pattern across multiple locations
FieldIsDelegateRelation<Schema, Model, Field> extends true 
    ? 'create' | 'createMany' | 'connectOrCreate' | 'upsert' 
    : never

• Recommendation: Extract this exclusion logic into a reusable utility type

2. Performance Considerations

TypeScript Compilation Performance

• Issue: Deep conditional types and extensive union distributions may slow TypeScript compilation
• Impact: Complex delegate hierarchies could affect IDE responsiveness
• Recommendation: Consider caching frequently used type computations or simplifying type complexity where possible

3. Documentation Gaps

Missing JSDoc for Key Types (packages/runtime/src/client/crud-types.ts:72)

type DelegateUnionResult<...> = // No documentation

• Recommendation: Add comprehensive JSDoc comments explaining the delegate union type behavior

Schema Attribute Documentation

• Missing: Clear documentation of @@delegate attribute usage and discriminator field requirements
• Recommendation: Add inline comments explaining the delegate model constraints

4. Potential Runtime Issues

Error Messages (packages/runtime/src/client/client-impl.ts:341)

const model = Object.keys(client.$schema.models).find((m) => m.toLowerCase() === prop.toLowerCase());

• Issue: Case-insensitive model lookup could be confusing for delegate model hierarchies
• Recommendation: Ensure error messages clearly distinguish between delegate and concrete models

🔒 Security Assessment

✅ No Security Concerns Identified

• Delegate restrictions are properly enforced at the type level
• No exposure of discriminator field manipulation
• Query builder access controls are maintained

🚀 Performance Impact

Minimal Runtime Impact

• Most restrictions are compile-time only
• Discriminated unions use TypeScript's built-in optimization
• Query generation remains efficient

📋 Test Coverage Assessment

Excellent Coverage

• ✅ Comprehensive type checking tests
• ✅ Edge case scenarios covered
• ✅ Integration with existing ORM operations
• ✅ Query builder compatibility verified

🎯 Recommendations

High Priority

1. Simplify Complex Types: Break down DelegateUnionResult and related types into smaller, documented utilities
2. Add JSDoc Documentation: Document key delegate-related types and their behavior
3. Extract Repeated Logic: Create reusable utility types for delegate operation exclusions

Medium Priority

1. Performance Testing: Benchmark TypeScript compilation performance with deeply nested delegate hierarchies
2. Error Message Enhancement: Improve error messages to clearly indicate delegate model restrictions
3. Schema Validation: Consider runtime validation of delegate model constraints

Low Priority

1. Code Organization: Consider moving delegate-specific types to a separate module for better organization

🏆 Overall Assessment

This is a high-quality implementation of a complex TypeScript feature. The delegate model typing system is well-designed, thoroughly tested, and provides excellent type safety. While there are opportunities to improve code clarity and documentation, the core implementation is solid and ready for production use.

Score: 8.5/10 - Excellent implementation with room for minor improvements in code clarity and documentation.

---