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Pull request overview
This PR implements MongoDB database connectivity for a Go-based API wrapper service. It establishes connection handling, configuration management, product search and retrieval endpoints, and database initialization scripts.
Changes:
- Replaced "Hello, world!" placeholder with a complete HTTP API service using Gin framework
- Added MongoDB connection and query functionality for product search and retrieval
- Configured environment-based settings with validation for database connection parameters
Reviewed changes
Copilot reviewed 52 out of 53 changed files in this pull request and generated 7 comments.
Show a summary per file
| File | Description |
|---|---|
| main.go | Implements main application logic with MongoDB connection, Gin router setup, and endpoint configuration with optional auth bypass |
| internal/config/load.go | Configuration loading and validation for MongoDB connection parameters from environment variables |
| internal/database/connect.go | MongoDB client connection wrapper function |
| internal/database/product/queries.go | Product query functions for finding by ID and searching by name using text indexes |
| internal/handlers/product/*.go | HTTP handlers for product endpoints with validation and error handling |
| docker-compose.yaml | Updated environment variables and service configuration for MongoDB integration |
| import_db.sh | Database initialization script with index creation for text search |
| go.mod | Added dependencies for MongoDB driver, Gin, and authentication libraries |
| Makefile | Added development workflow commands for container management |
| flake.nix | Added mongosh to development environment |
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| database-api-wrapper-mongodb: | ||
| condition: service_healthy | ||
| healthcheck: | ||
| test: ["CMD-SHELL", "curl -f http://localhost:80/health || exit 1"] |
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The health check endpoint /health is referenced in the docker-compose.yaml but is not implemented in the application. The router only defines /products/search and /products/:id endpoints. Either implement a /health endpoint or update the health check to use an existing endpoint.
internal/database/connect.go
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| func Connect(uri string) (*mongo.Client, error) { | ||
| client, err := mongo.Connect(options.Client().ApplyURI(uri)) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("Failed to connect to MongoDB: %v", err.Error()) |
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Calling .Error() on an error when using %v is redundant. The %v verb already converts the error to a string. Simply use err instead of err.Error().
| if err != nil || limit <= 0 || limit >= 100 { | ||
| log.Println(err) | ||
| c.JSON(http.StatusBadRequest, gin.H{"error": "Query parameter 'limit' must be a positive integer less than 100"}) | ||
| return | ||
| } |
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When limit validation fails due to boundary conditions (limit <= 0 or limit >= 100), err may be nil, causing log.Println(err) to log ''. The error logging should only occur when err is not nil.
| fmt.Println("Hello, world!") | ||
| loadConfigs() | ||
| db := connectDatabase() | ||
| defer disconnectDatabase(db) |
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The disconnectDatabase function panics on error, which defeats the purpose of deferred cleanup. Database disconnection errors during shutdown should be logged rather than causing a panic. Consider logging the error instead of panicking.
internal/handlers/product/getId.go
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| return | ||
| } | ||
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| c.JSON(200, gin.H{"product": productJSON}) |
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Use the http.StatusOK constant instead of the magic number 200 for consistency with other status code usages in the same file (lines 13, 20, 25).
| return | ||
| } | ||
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| c.JSON(http.StatusOK, gin.H{"products": productsJSON}) |
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The API returns productsJSON as a string containing serialized JSON rather than a structured object. This creates double-encoded JSON (JSON string inside JSON response), which is unconventional. Consider returning the deserialized bson.M object directly instead of a JSON string.
internal/handlers/product/getId.go
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| return | ||
| } | ||
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| c.JSON(200, gin.H{"product": productJSON}) |
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The API returns productJSON as a string containing serialized JSON rather than a structured object. This creates double-encoded JSON (JSON string inside JSON response), which is unconventional. Consider returning the deserialized bson.M object directly instead of a JSON string.
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