fix: disallow extending from multiple delegate models

[ymc9]

Summary by CodeRabbit

• New Features
  • Enhanced data model validation to prevent extending from multiple delegate models, ensuring more robust and error-free data structures.
• Tests
  • Added test cases to verify the new validation rule against multiple delegate model extensions.

[coderabbitai]

Walkthrough

Walkthrough

The recent update introduces a validation mechanism within the DataModelValidator to prevent models from extending multiple delegate models. This enhancement ensures that each model adheres to a single inheritance principle concerning delegate base types. Additionally, the validation process is rigorously tested through a new test case designed to verify the correct identification and handling of errors when a model attempts to extend more than one delegate model.

Changes

File Path	Change Summary
.../language-server/validator/datamodel-validator.ts	Added validateBaseDelegateModel method to check for multiple delegate model extensions in superTypes.
.../tests/schema/validation/datamodel-validation.test.ts	New test case added to validate error handling for multiple delegate model extensions.

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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 c0a9a02 and e381e5c.

Files selected for processing (2)

• packages/schema/src/language-server/validator/datamodel-validator.ts (2 hunks)
• packages/schema/tests/schema/validation/datamodel-validation.test.ts (1 hunks)

Additional comments: 3

packages/schema/src/language-server/validator/datamodel-validator.ts (2)

• 401-408: The implementation of validateBaseDelegateModel correctly enforces the new rule against extending multiple delegate models. The method is well-integrated within the validate method, ensuring that this validation check is part of the overall model validation process.
• 25-25: The integration of validateBaseDelegateModel within the validate method is correctly positioned, ensuring that the new validation rule is applied as part of the overall model validation sequence.

packages/schema/tests/schema/validation/datamodel-validation.test.ts (1)

• 718-740: The new test case delegate base type correctly verifies the behavior of extending from multiple delegate models. It effectively tests the new validation rule, ensuring that the expected error is triggered and reported.