Chore: Optimize MySql Recipe #3333
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Summary of ChangesHello @stewartmbofana, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request optimizes the MySQL recipe within the Go Fiber application by refining API endpoint structures, enhancing error handling with standard HTTP status codes, and streamlining database interactions. The changes aim to improve the robustness, clarity, and RESTfulness of the employee management API. Highlights
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Note Other AI code review bot(s) detectedCodeRabbit has detected other AI code review bot(s) in this pull request and will avoid duplicating their findings in the review comments. This may lead to a less comprehensive review. WalkthroughRefactors employee endpoints in Changes
Sequence Diagram(s)sequenceDiagram
autonumber
participant C as Client
participant S as API Server (Fiber)
participant DB as MySQL
rect rgba(235,245,255,0.6)
note over C,S: List employees
C->>S: GET /employee
S->>DB: SELECT * FROM employees ORDER BY ...
DB-->>S: rows
S-->>C: 200 OK [Employee...]
end
rect rgba(235,245,255,0.6)
note over C,S: Read by id
C->>S: GET /employee/:id
S->>S: parse & validate id (400 if invalid)
S->>DB: SELECT ... WHERE id=?
alt found
DB-->>S: row
S-->>C: 200 OK Employee
else not found
DB-->>S: empty
S-->>C: 404 Not Found
end
end
rect rgba(235,255,235,0.6)
note over C,S: Create
C->>S: POST /employee {json}
S->>S: parse & validate body (400 if invalid)
S->>DB: INSERT ... VALUES ...
DB-->>S: result (LastInsertId)
S-->>C: 201 Created Employee{id}
end
rect rgba(255,250,230,0.6)
note over C,S: Update
C->>S: PUT /employee/:id {json}
S->>S: parse & validate id/body (400 if invalid)
S->>DB: UPDATE ... WHERE id=?
DB-->>S: result (RowsAffected)
alt updated
S-->>C: 200 OK Employee
else not found
S-->>C: 404 Not Found
end
end
rect rgba(255,240,240,0.6)
note over C,S: Delete
C->>S: DELETE /employee/:id
S->>S: parse & validate id (400 if invalid)
S->>DB: DELETE FROM ... WHERE id=?
DB-->>S: result (RowsAffected)
alt deleted
S-->>C: 204 No Content
else not found
S-->>C: 404 Not Found
end
end
note over S: Internal errors return http.StatusInternalServerError
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~25 minutes Poem
Pre-merge checks and finishing touches❌ Failed checks (1 warning)
✅ Passed checks (2 passed)
✨ Finishing touches
🧪 Generate unit tests (beta)
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Code Review
This pull request significantly improves the MySQL recipe by adopting more RESTful API design principles and robust error handling. The handlers for creating, updating, and deleting employees now use path parameters for IDs, return appropriate HTTP status codes, and check for non-existent records. I've identified a few places where errors from database result methods are ignored, which could lead to unexpected behavior. Addressing these will make the code even more reliable.
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Actionable comments posted: 4
📜 Review details
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📒 Files selected for processing (1)
mysql/main.go(3 hunks)
🧰 Additional context used
🧬 Code graph analysis (1)
mysql/main.go (1)
gorm-mysql/routes/routes.go (1)
Delete(60-68)
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Actionable comments posted: 0
♻️ Duplicate comments (4)
mysql/main.go (4)
108-109: Handle the error fromLastInsertId().The error returned by
result.LastInsertId()is being ignored. This method can return an error if the driver does not support it or if the operation fails. Handle this error to prevent unexpected behavior.Apply this diff:
- id, _ := result.LastInsertId() - emp.ID = int(id) + id, err := result.LastInsertId() + if err != nil { + return c.Status(http.StatusInternalServerError).SendString(err.Error()) + } + emp.ID = int(id)
130-133: Handle the error fromRowsAffected().The error returned by
result.RowsAffected()is being ignored. This method can return an error if the driver doesn't support it. Handle this potential error to make the handler more robust.Apply this diff:
- rowsAffected, _ := result.RowsAffected() - if rowsAffected == 0 { - return c.SendStatus(http.StatusNotFound) - } + rowsAffected, err := result.RowsAffected() + if err != nil { + return c.Status(http.StatusInternalServerError).SendString(err.Error()) + } + if rowsAffected == 0 { + return c.SendStatus(http.StatusNotFound) + }
135-135: Setemp.IDfrom the path parameter before returning.The returned JSON may contain a client-supplied ID (often zero or incorrect) instead of the actual path parameter ID. Set
emp.IDto the parsed path parameter before returning to ensure the response reflects the correct resource ID.Apply this diff:
+ emp.ID = id return c.JSON(emp)
149-152: Handle the error fromRowsAffected().The error returned by
result.RowsAffected()is being ignored. This method can return an error if the driver doesn't support it. Handle this potential error to make the handler more robust.Apply this diff:
- rowsAffected, _ := result.RowsAffected() - if rowsAffected == 0 { - return c.SendStatus(http.StatusNotFound) - } + rowsAffected, err := result.RowsAffected() + if err != nil { + return c.Status(http.StatusInternalServerError).SendString(err.Error()) + } + if rowsAffected == 0 { + return c.SendStatus(http.StatusNotFound) + }
🧹 Nitpick comments (2)
mysql/main.go (2)
99-101: Consider adding input validation for Employee fields.The code currently accepts any values for
Name,Salary, andAgewithout validation. Consider adding checks for edge cases such as empty names, negative salaries, or invalid age ranges to improve data quality and prevent unexpected database states.Example validation:
if err := c.BodyParser(&emp); err != nil { return c.Status(http.StatusBadRequest).SendString(err.Error()) } if emp.Name == "" { return c.Status(http.StatusBadRequest).SendString("name is required") } if emp.Salary < 0 { return c.Status(http.StatusBadRequest).SendString("salary must be non-negative") } if emp.Age < 0 || emp.Age > 150 { return c.Status(http.StatusBadRequest).SendString("invalid age") }Also applies to: 121-123
61-61: Consider sanitizing error messages in production.The handlers currently return raw database error messages directly to clients. In production, this could expose internal implementation details or sensitive information. Consider logging detailed errors server-side and returning generic error messages to clients.
Example approach:
if err != nil { log.Printf("Database error: %v", err) return c.Status(http.StatusInternalServerError).SendString("internal server error") }Also applies to: 69-69, 74-74, 91-91, 105-105, 127-127, 146-146
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
mysql/main.go(2 hunks)
🧰 Additional context used
🧬 Code graph analysis (1)
mysql/main.go (1)
gorm-mysql/routes/routes.go (1)
Delete(60-68)
🔇 Additional comments (1)
mysql/main.go (1)
10-11: LGTM: Import additions are appropriate.The
net/httpandstrconvimports are correctly added to support HTTP status code constants and ID parameter parsing throughout the endpoints.
1 participant
Changes:
Summary by CodeRabbit
New Features
Bug Fixes
Refactor