Add solution for gorm challenge-1-crud-operations by orsenthil

[orsenthil]

gorm challenge-1-crud-operations Solution

Submitted by: @orsenthil
Package: gorm
Challenge: challenge-1-crud-operations

Description

This PR contains my solution for gorm challenge-1-crud-operations.

Changes

• Added solution file to packages/gorm/challenge-1-crud-operations/submissions/orsenthil/solution.go

Testing

• Solution passes all test cases
• Code follows Go best practices

Thank you for reviewing my submission! 🚀

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Walkthrough

A new Go file implements GORM-based CRUD operations for a User model with SQLite in-memory database. Includes database initialization, Create, Read (single/all), Update, and Delete operations with model constraints and error handling.

Changes

Cohort / File(s)	Summary
GORM CRUD Implementation packages/gorm/challenge-1-crud-operations/submissions/orsenthil/solution.go	New file with User struct (ID, Name, Email, Age, timestamps) and six CRUD functions: ConnectDB initializes SQLite in-memory DB; CreateUser inserts new users; GetUserByID and GetAllUsers retrieve data; UpdateUser modifies existing records; DeleteUser removes by ID with RowsAffected validation. Database constraints enforce primary key, unique email, non-null fields, and age > 0.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

• Database constraints validation: Verify that all model constraints (primaryKey, not null, unique, age check) are correctly applied and will function as intended with GORM's auto-migration
• Error handling edge cases: Confirm DeleteUser's handling of non-existent records via RowsAffected and proper return of gorm.ErrRecordNotFound
• UpdateUser logic: Verify the existence check before save is correctly implemented and prevents unintended updates
• Connection lifecycle: Ensure ConnectDB properly initializes the in-memory database and auto-migration without side effects

Pre-merge checks

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: adding a GORM CRUD challenge solution by a specific contributor.
Description check	✅ Passed	The description is clearly related to the changeset, outlining the challenge submission, file location, and testing status.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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Actionable comments posted: 0

🧹 Nitpick comments (1)

packages/gorm/challenge-1-crud-operations/submissions/orsenthil/solution.go (1)

62-74: Reasonable update pattern with explicit existence check.

The function correctly implements an update operation with an explicit existence check before saving. While db.Save alone would handle the operation (performing an upsert), the explicit check provides clearer error handling by immediately returning an error if the user doesn't exist.

Optional note: The existence check adds an extra database query. If performance is a concern, you could rely on db.Save alone and check RowsAffected, but the current pattern is more explicit and easier to understand for a challenge solution.

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 2d4b9cf and aabfab3.

📒 Files selected for processing (1)

• packages/gorm/challenge-1-crud-operations/submissions/orsenthil/solution.go (1 hunks)

🔇 Additional comments (7)

packages/gorm/challenge-1-crud-operations/submissions/orsenthil/solution.go (7)

1-8: LGTM! Clean imports.

The package declaration and imports are appropriate for this challenge solution. All imports are necessary and properly organized.

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10-18: Excellent model definition with appropriate constraints.

The User struct is well-designed with proper GORM tags including primary key, not null constraints, unique email, and age validation. The inclusion of CreatedAt/UpdatedAt fields enables automatic timestamp management.

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20-34: LGTM! Proper database initialization.

The function correctly establishes an in-memory SQLite connection with shared cache and auto-migrates the schema. Error handling is appropriate for both database connection and migration steps.

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36-40: LGTM! Idiomatic create operation.

The CreateUser function correctly uses GORM's Create method with proper error handling. Using a pointer parameter allows GORM to populate the generated ID back to the caller.

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42-50: LGTM! Correct retrieval by ID.

The function properly uses GORM's First method to fetch a user by primary key. Error handling is correct and will return gorm.ErrRecordNotFound when the user doesn't exist.

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52-60: LGTM! Proper list operation.

The GetAllUsers function correctly uses GORM's Find method to retrieve all users. The return type ([]User) is idiomatic and will return an empty slice when no users exist, which is the expected behavior.

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76-89: LGTM! Proper delete implementation with existence validation.

The DeleteUser function correctly uses GORM's Delete method and properly checks RowsAffected to detect when no record was deleted. Returning gorm.ErrRecordNotFound in this case is idiomatic and consistent with GORM's error handling patterns.