fix: preserve prisma client extensions's typing

[ymc9]

Fixes #1140

Summary by CodeRabbit

• New Features
  • Enhanced flexibility in Prisma client enhancements, supporting both plain and extended types.
• Tests
  • Improved integration tests for Prisma client enhancements, focusing on polymorphism and TypeScript compilation adjustments.

[coderabbitai]

Walkthrough

Walkthrough

The recent changes involve enhancing the PrismaClient functionality by introducing overloads for both plain and extended PrismaClient instances. This enhancement aims to provide flexibility in handling different types of Prisma clients, accommodating additional arguments for context and options. Furthermore, the integration tests have been refactored to support these enhancements, focusing on polymorphism and TypeScript compilation adjustments for both plain and extended Prisma scenarios.

Changes

Files	Change Summary
packages/schema/src/plugins/enhancer/enhance/index.ts	Modified EnhancerGenerator class to include overloads for both plain and extended PrismaClient, adding support for additional context and options arguments.
tests/integration/tests/enhancements/with-delegate/enhanced-client.test.ts	Refactored test script to support polymorphism in plain and extended Prisma scenarios, including TypeScript compilation adjustments.

Assessment against linked issues

Objective	Addressed	Explanation
Investigate and resolve polymorphism typing with Prisma client extensions (#1140)	✅
Identify the root cause of the typing problem related to polymorphism (#1140)	❓	The summary does not explicitly mention identifying the root cause but implies a resolution.
Implement a solution for polymorphism typing with Prisma client extensions (#1140)	✅
Test changes to verify resolution of the typing issue without introducing new bugs (#1140)	❓	The changes include test script refactoring, but it's unclear if all scenarios are covered.
Document the modifications made to address the typing problem (#1140)	❌	No documentation changes are mentioned in the summary.

This assessment indicates that while the main objectives related to coding have been addressed, there is a lack of explicit mention of documentation updates and a complete verification through testing, which leaves some ambiguity regarding the thoroughness of the resolution.

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Review Status

Actionable comments generated: 0

Configuration used: CodeRabbit UI

Commits

Files that changed from the base of the PR and between 01e372e and 61438cc.

Files selected for processing (2)

• packages/schema/src/plugins/enhancer/enhance/index.ts (1 hunks)
• tests/integration/tests/enhancements/with-delegate/enhanced-client.test.ts (3 hunks)

Additional comments: 3

packages/schema/src/plugins/enhancer/enhance/index.ts (1)

• 95-127: The implementation of function overloads for enhance effectively addresses the need for supporting both plain and extended PrismaClient instances. This flexibility is crucial for the polymorphism feature to work seamlessly with Prisma client extensions. However, there are a few points to consider for refinement:

1. Type Safety and Documentation: Ensure that the types used in the function signatures (ExtArgs, TypeMap, TypeMapCb, etc.) are well-documented. This will help developers understand the expected structure and usage of these types, especially when extending the PrismaClient.

2. Error Handling: Consider adding error handling within the enhance function to manage cases where the provided prisma instance does not match any of the expected types. This could involve throwing a descriptive error or logging a warning to assist in debugging.

3. Performance Considerations: Given that the enhance function is likely to be called frequently, evaluate the performance implications of the type checks and operations performed within the function. If there are any potential bottlenecks, consider optimizing these areas.

4. Testing: Ensure comprehensive testing of the enhance function, covering various scenarios with both plain and extended PrismaClient instances. This includes testing with different combinations of context and options arguments to verify that the function behaves as expected in all cases.

Overall, the changes to the enhance function are a positive step towards resolving the issue with polymorphism's typing and Prisma client extensions. Addressing the above points will further strengthen the implementation and ensure a robust solution.

tests/integration/tests/enhancements/with-delegate/enhanced-client.test.ts (2)

• 1080-1161: > 📝 NOTE

This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [1040-1095]

The test case for TypeScript compilation with a plain Prisma client is well-structured and demonstrates the intended use case effectively. However, consider adding assertions to verify the expected behavior of the operations performed within the main function. This would ensure that the enhancements applied to the Prisma client are functioning as expected.

Consider adding assertions or checks after the database operations to verify the expected outcomes. This could involve checking the properties of the created entities or the results of queries to ensure they match expected values.

• 1097-1159: Similar to the previous comment, the test case for TypeScript compilation with an extended Prisma client is well-structured. It effectively demonstrates extending the Prisma client with custom methods. As with the plain Prisma client test case, adding assertions to verify the expected behavior would enhance the test's effectiveness.

Adding assertions or checks after database operations in the main function would help verify that the enhancements and custom methods applied to the Prisma client are working as intended. This could involve checking the properties of the created entities or the results of queries.

[coderabbitai]

Review Status

Actionable comments generated: 0

Configuration used: CodeRabbit UI

Commits

Files that changed from the base of the PR and between 61438cc and 6671675.

Files selected for processing (1)

• tests/integration/tests/cli/plugins.test.ts (2 hunks)

Additional comments: 2

tests/integration/tests/cli/plugins.test.ts (2)

• 76-76: Please ensure that the project and its tests are fully compatible with @prisma/client version ^5.0.0. This may involve reviewing the release notes for breaking changes or new features that could impact the project.
• 86-86: Please ensure that the development environment and build processes are fully compatible with prisma version ^5.0.0. Reviewing the release notes for potential breaking changes or new features that could affect the project is advisable.