Updated ER diagram

Fixed data types. Fixed syntax.

Documentation/Diagrams/Entity Relationship Diagram.md

@@ -1,88 +1,36 @@
 ```mermaid
 erDiagram
     Customer {
-        int id PK
+        long id PK
         string first_name
         string last_name
         string country
-        string state
         string address
         int postal_code
-        int phone_number
         int mobile_number
         string email
-        int invoice_id FK
         int review_id FK
     }
 
-    Employee {
-        int id PK
-        string first_name
-        string last_name
-        string country
-        string state
-        string address
-        int postal_code
-        int phone_number
-        int mobile_number
-        string email
-        string designation
-        string department
-    }
-
-    Invoice {
-        int id PK
-        string date
-        string time
-        int customer_id FK
-        int transaction_id FK
-    }
-
     Review {
-        int id PK
+        long id PK
         string category
-        double rating
         string review_content
+        int rating
         int customer_id FK
         int product_id FK
     }
 
     Product {
-        int id PK
-        int item_code
+        long id PK
         string category
         string name
         string description
         double price
         int stock_quantity
-        string review_id FK
-    }
-
-    Store {
-        int id PK
-        string name
-        string country
-        string state
-        string address
-        int postal_code
-        int phone_number
-        int store_stock_quantity
-        int employee_id FK
-        int product_id FK
-    }
-
-    Transaction {
-        int id PK
-        int quantity
-        int product_id FK
+        int review_id FK
     }
 
     Customer ||--O{ Review : "Has"
-    Customer ||--O{ Invoice : "Has"
-    Invoice ||--|{ Transaction : "Has"
     Product ||--O{ Review : "Has"
-    Store }O--O{ Product : "Has"
-    Store ||--|{ Employee : "Has"
-    Transaction }O--|| Product : "Has"
-    %% Employee |O--O{ Employee : "Manages"
 ```

src/main/java/sg/com/smartinventory/DataLoader.java

@@ -13,53 +13,60 @@
 
 @Component
 public class DataLoader {
-  // Inject all repositories.
-  private CustomerRepository customerRepository;
-  private ProductRepository productRepository;
-  private ReviewRepository reviewRepository;
+    // Inject all repositories.
+    private CustomerRepository customerRepository;
+    private ProductRepository productRepository;
+    private ReviewRepository reviewRepository;
 
-  // @Autowired
-  public DataLoader(CustomerRepository customerRepository, ProductRepository productRepository,
-      ReviewRepository reviewRepository) {
-    this.customerRepository = customerRepository;
-    this.productRepository = productRepository;
-    this.reviewRepository = reviewRepository;
-  }
+    // @Autowired
+    public DataLoader(CustomerRepository customerRepository, ProductRepository productRepository,
+            ReviewRepository reviewRepository) {
+        this.customerRepository = customerRepository;
+        this.productRepository = productRepository;
+        this.reviewRepository = reviewRepository;
+    }
 
-  @PostConstruct
-  public void loadData() {
-    // Clear all data.
-    customerRepository.deleteAll();
-    productRepository.deleteAll();
-    reviewRepository.deleteAll();
+    @PostConstruct
+    public void loadData() {
+        // Clear all data.
+        customerRepository.deleteAll();
+        productRepository.deleteAll();
+        reviewRepository.deleteAll();
 
-    // Create fake data.
-    customerRepository
-        .save(new Customer("John", "Doe", "USA", "123 Main St", 123456, 12345678, "[email protected]", 101));
-    customerRepository.save(
-        new Customer("Alice", "Smith", "Canada", "456 Maple Ave", 543210, 98765432, "[email protected]", 102));
-    customerRepository.save(
-        new Customer("Michael", "Johnson", "UK", "789 Oak Rd", 567890, 98761234, "[email protected]", 103));
-    customerRepository.save(
-        new Customer("Emily", "Brown", "Australia", "321 Elm St", 135790, 45678912, "[email protected]", 104));
-    customerRepository.save(
-        new Customer("David", "Wilson", "Germany", "654 Pine Rd", 987655, 36985214, "[email protected]", 105));
+        // Create fake data.
+        customerRepository
+                .save(new Customer("John", "Doe", "USA", "123 Main St", 123456, 12345678, "[email protected]", 101));
+        customerRepository.save(
+                new Customer("Alice", "Smith", "Canada", "456 Maple Ave", 543210, 98765432, "[email protected]",
+                        102));
+        customerRepository.save(
+                new Customer("Michael", "Johnson", "UK", "789 Oak Rd", 567890, 98761234, "[email protected]",
+                        103));
+        customerRepository.save(
+                new Customer("Emily", "Brown", "Australia", "321 Elm St", 135790, 45678912, "[email protected]",
+                        104));
+        customerRepository.save(
+                new Customer("David", "Wilson", "Germany", "654 Pine Rd", 987655, 36985214, "[email protected]",
+                        105));
 
-    productRepository.save(
-        new Product("Electronics", "Smartphone", "High-end smartphone with advanced features", 999.99, 100, "101"));
-    productRepository.save(
-        new Product("Clothing", "Men's T-Shirt", "Comfortable cotton t-shirt for everyday wear", 29.99, 500, "102"));
-    productRepository.save(new Product("Home & Kitchen", "Coffee Maker",
-        "Automatic coffee maker with programmable settings", 49.99, 50, "103"));
-    productRepository
-        .save(new Product("Beauty", "Perfume", "Elegant fragrance with floral and citrus notes", 79.99, 200, "104"));
-    productRepository.save(new Product("Books", "Science Fiction Novel",
-        "Bestselling sci-fi novel set in a dystopian future", 14.99, 300, "105"));
+        productRepository.save(
+                new Product("Electronics", "Smartphone", "High-end smartphone with advanced features", 999.99, 100,
+                        101));
+        productRepository.save(
+                new Product("Clothing", "Men's T-Shirt", "Comfortable cotton t-shirt for everyday wear", 29.99, 500,
+                        102));
+        productRepository.save(new Product("Home & Kitchen", "Coffee Maker",
+                "Automatic coffee maker with programmable settings", 49.99, 50, 103));
+        productRepository
+                .save(new Product("Beauty", "Perfume", "Elegant fragrance with floral and citrus notes", 79.99, 200,
+                        104));
+        productRepository.save(new Product("Books", "Science Fiction Novel",
+                "Bestselling sci-fi novel set in a dystopian future", 14.99, 300, 105));
 
-    reviewRepository.save(new Review("Electronics", "Great smartphone with excellent features.", 5, 101, 201));
-    reviewRepository.save(new Review("Clothing", "Very comfortable t-shirt, fits perfectly.", 4, 102, 202));
-    reviewRepository.save(new Review("Home & Kitchen", "Makes delicious coffee, easy to use.", 4, 103, 203));
-    reviewRepository.save(new Review("Beauty", "Lovely fragrance, long-lasting.", 5, 104, 204));
-    reviewRepository.save(new Review("Books", "Intriguing plot, couldn't put it down.", 5, 105, 205));
-  }
+        reviewRepository.save(new Review("Electronics", "Great smartphone with excellent features.", 5, 101, 201));
+        reviewRepository.save(new Review("Clothing", "Very comfortable t-shirt, fits perfectly.", 4, 102, 202));
+        reviewRepository.save(new Review("Home & Kitchen", "Makes delicious coffee, easy to use.", 4, 103, 203));
+        reviewRepository.save(new Review("Beauty", "Lovely fragrance, long-lasting.", 5, 104, 204));
+        reviewRepository.save(new Review("Books", "Intriguing plot, couldn't put it down.", 5, 105, 205));
+    }
 }

src/main/java/sg/com/smartinventory/entity/Product.java

@@ -39,13 +39,13 @@ public class Product {
   private int stockQuantity;
 
   @Column(name = "review_id")
-  private String reviewId; // FK.
+  private int reviewId; // FK.
 
   public Product() {
   }
 
   // Define Constructor for DataLoader.
-  public Product(String category, String name, String description, double price, int stockQuantity, String reviewId) {
+  public Product(String category, String name, String description, double price, int stockQuantity, int reviewId) {
     this();
 
     this.category = category;