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fix(delegate): self relation support #1821

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Merged
merged 2 commits into from
Oct 31, 2024
Merged

fix(delegate): self relation support #1821

merged 2 commits into from
Oct 31, 2024

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ymc9
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@ymc9 ymc9 commented Oct 31, 2024

fixes #1764

fixes #1764
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coderabbitai bot commented Oct 31, 2024

📝 Walkthrough

Walkthrough

The pull request introduces modifications to the PrismaSchemaGenerator class, specifically renaming methods and refining the logic for handling relations in the Prisma schema. The method nameRelationsInheritedFromDelegate is renamed to ensureRelationsInheritedFromDelegate, indicating a shift in focus towards ensuring the existence of relations. Additionally, new test cases are added to validate self-referential relationships within the User model, covering one-to-one, one-to-many, and many-to-many scenarios.

Changes

File Change Summary
packages/schema/src/plugins/prisma/schema-generator.ts - Renamed method nameRelationsInheritedFromDelegate to ensureRelationsInheritedFromDelegate.
- Updated comments for clarity on "physical" and "logical" schema operations.
- Refined logic in expandPolymorphicRelations for inherited fields.
tests/integration/tests/enhancements/with-delegate/enhanced-client.test.ts - Added new test cases for self-referential relationships in the User model: one-to-one, one-to-many, and many-to-many.

Assessment against linked issues

Objective Addressed Explanation
Generate throws when combining polymorphism and self-relations (1764)

Possibly related PRs


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@ymc9 ymc9 marked this pull request as ready for review October 31, 2024 07:36
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Actionable comments posted: 3

🧹 Outside diff range and nitpick comments (6)
tests/integration/tests/enhancements/with-delegate/enhanced-client.test.ts (3)

1411-1441: LGTM! Consider adding negative test cases.

The test case effectively validates one-to-one self-referential relationships between different concrete types (Person and Organization). The implementation correctly tests both sides of the relationship.

Consider adding the following test scenarios to improve coverage:

  1. Verify that the @unique constraint on successorId prevents multiple users from having the same successor
  2. Test the behavior when attempting to create circular references

1443-1474: LGTM! Consider expanding test coverage.

The test case effectively validates one-to-many self-referential relationships between different concrete types. The implementation correctly tests both sides of the relationship.

Consider adding the following test scenarios to improve coverage:

  1. Test with multiple children to verify the one-to-many relationship works correctly
  2. Verify cascade delete behavior when a parent is deleted
  3. Test updating parent relationship (changing parent)

1476-1506: LGTM! Consider adding more complex scenarios.

The test case effectively validates many-to-many self-referential relationships between different concrete types. The implementation correctly tests both sides of the relationship.

Consider adding the following test scenarios to improve coverage:

  1. Test with multiple followers and following relationships
  2. Test disconnecting/removing relationships
  3. Test querying users by their follower/following count
packages/schema/src/plugins/prisma/schema-generator.ts (3)

420-422: Fix inconsistent indentation for better code readability.

The indentation around lines 420 to 422 is inconsistent, which may lead to confusion. Proper indentation is essential for readability, especially in nested conditional statements. Please adjust the indentation to accurately reflect the code structure.


466-469: Correct indentation to match code structure.

Lines 466 to 469 exhibit inconsistent indentation. Ensuring consistent indentation improves the maintainability and readability of the code. Align the closing braces with their corresponding opening statements.


Line range hint 626-726: Add comments to clarify complex logic in relation handling.

The logic between lines 626 and 726 involves intricate steps for managing relations inherited from delegate models, including conditionally generating foreign key fields and handling self-relations. Adding explanatory comments within this block can aid future maintainability and help others understand the reasoning behind these operations.

📜 Review details

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Review profile: CHILL

📥 Commits

Reviewing files that changed from the base of the PR and between be28f2e and 72d88b1.

📒 Files selected for processing (2)
  • packages/schema/src/plugins/prisma/schema-generator.ts (10 hunks)
  • tests/integration/tests/enhancements/with-delegate/enhanced-client.test.ts (1 hunks)
🔇 Additional comments (1)
packages/schema/src/plugins/prisma/schema-generator.ts (1)

506-506: ⚠️ Potential issue

Implement the code to fix the field name as indicated by the comment.

At line 506, the comment // fix its name suggests that there should be code to modify the addedFkField name, but the implementation is missing. Include the necessary code to adjust the field name accordingly.

Apply this diff to fix the field name:

 // fix its name
+addedFkField.name = this.truncate(`${delegateModel.name}_${addedFkField.name}`);

Likely invalid or redundant comment.

Comment on lines +297 to +307
// physical: generate relation fields on base models linking to concrete models
this.generateDelegateRelationForBase(model, decl);

// generate reverse relation fields on concrete models
// physical: generate reverse relation fields on concrete models
this.generateDelegateRelationForConcrete(model, decl);

// expand relations on other models that reference delegated models to concrete models
// logical: expand relations on other models that reference delegated models to concrete models
this.expandPolymorphicRelations(model, decl);

// name relations inherited from delegate base models for disambiguation
this.nameRelationsInheritedFromDelegate(model, decl);
// logical: ensure relations inherited from delegate models
this.ensureRelationsInheritedFromDelegate(model, decl);
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🛠️ Refactor suggestion

Refactor method calls based on mode to improve efficiency and readability.

The methods generateDelegateRelationForBase, generateDelegateRelationForConcrete, expandPolymorphicRelations, and ensureRelationsInheritedFromDelegate are called within the generateModel method regardless of the current mode. Each method internally checks this.mode before executing any logic.

To enhance performance and code clarity, consider conditionally invoking these methods based on the current mode. This approach avoids unnecessary function calls and makes the code flow more explicit.

Comment on lines +498 to +504
addedFkField.attributes = addedFkField.attributes.filter(
(attr) => !('name' in attr && attr.name === '@unique')
);
const uniqueAttr = addedFkField.addAttribute('@unique');
const constraintName = this.truncate(`${delegateModel.name}_${addedFkField.name}_${concreteModel.name}_unique`);
uniqueAttr.args.push(new PrismaAttributeArg('map', new AttributeArgValue('String', constraintName)));

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⚠️ Potential issue

Conditionally add 'map' argument based on provider support for named constraints.

In lines 498 to 504, you add a @unique attribute with a 'map' argument to specify a constraint name. However, not all database providers support named constraints. To prevent potential errors, check this.supportNamedConstraints before adding the 'map' argument.

Apply this diff to conditionally include the 'map' argument:

 const uniqueAttr = addedFkField.addAttribute('@unique');
 const constraintName = this.truncate(`${delegateModel.name}_${addedFkField.name}_${concreteModel.name}_unique`);
-if (this.supportNamedConstraints) {
+if (this.supportNamedConstraints) {
     uniqueAttr.args.push(new PrismaAttributeArg('map', new PrismaAttributeArgValue('String', constraintName)));
+}

Committable suggestion was skipped due to low confidence.

Comment on lines +484 to +485
delegateModel: DataModel,
concreteModel: DataModel,
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⚠️ Potential issue

Incomplete method signature: missing method name and access modifier.

The method definition at lines 484-485 appears incomplete. The method name and access modifier (e.g., private) are missing, which would result in a syntax error. Ensure the method signature includes all necessary components.

Apply this diff to fix the method signature:

-            delegateModel: DataModel,
-            concreteModel: DataModel,
-            origForeignKey: DataModelField
+    private replicateForeignKey(
+        delegateModel: DataModel,
+        concreteModel: DataModel,
+        origForeignKey: DataModelField
+    ) {
+        // method implementation
+    }

Committable suggestion was skipped due to low confidence.

@ymc9 ymc9 merged commit 2bb8970 into dev Oct 31, 2024
13 checks passed
@ymc9 ymc9 deleted the fix/delegate-self-relation branch October 31, 2024 08:08
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