fix delete category

mysql-code/Init-Data.sql

@@ -72,6 +72,7 @@ VALUES
 INSERT INTO
     Category (Name)
 VALUES
+	('Other'),
     ('Textbooks'),
     ('Electronics'),
     ('Furniture'),
@@ -100,9 +101,8 @@ VALUES
     ('Winter Clothing'),
     ('Photography Equipment'),
     ('Event Tickets'),
-    ('Software Licenses'),
-    ('Transportation (Car Pool)'),
-    ('Other');
+    ('Software Licenses');
+    
 
 -- Insert Products
 INSERT INTO
@@ -454,4 +454,5 @@ VALUES
         1,
         'This is a great fake product! Totally recommend it.',
         5,
-    );
+        '2024-10-02 16:00:00'
+    )

mysql-code/Schema.sql

@@ -28,19 +28,6 @@ CREATE TABLE Category (
     Name VARCHAR(255) NOT NULL
 );
 
-CREATE TABLE Product (
-    ProductID INT AUTO_INCREMENT PRIMARY KEY,
-    Name VARCHAR(255) NOT NULL,
-    Price DECIMAL(10, 2) NOT NULL,
-    StockQuantity INT,
-    UserID INT,
-    Description TEXT,
-    CategoryID INT NOT NULL,
-    Date DATETIME DEFAULT CURRENT_TIMESTAMP,
-    FOREIGN KEY (UserID) REFERENCES User (UserID),
-    FOREIGN KEY (CategoryID) REFERENCES Category (CategoryID)
-);
-
 -- Product Entity
 CREATE TABLE Product (
     ProductID INT AUTO_INCREMENT PRIMARY KEY,
@@ -51,7 +38,7 @@ CREATE TABLE Product (
     Description TEXT,
     CategoryID INT,
     Date DATETIME DEFAULT CURRENT_TIMESTAMP,
-    FOREIGN KEY (UserID) REFERENCES User (UserID) ON DELETE SET NULL,
+    FOREIGN KEY (UserID) REFERENCES User (UserID) ON DELETE CASCADE,
     FOREIGN KEY (CategoryID) REFERENCES Category (CategoryID)
 );
 
@@ -73,7 +60,7 @@ CREATE TABLE Review (
         AND Rating <= 5
     ),
     Date DATETIME DEFAULT CURRENT_TIMESTAMP,
-    FOREIGN KEY (UserID) REFERENCES User (UserID) ON DELETE SET NULL,
+    FOREIGN KEY (UserID) REFERENCES User (UserID) ON DELETE CASCADE,
     FOREIGN KEY (ProductID) REFERENCES Product (ProductID) ON DELETE CASCADE
 );
 
@@ -85,7 +72,7 @@ CREATE TABLE Transaction (
     Date DATETIME DEFAULT CURRENT_TIMESTAMP,
     PaymentStatus VARCHAR(50),
     FOREIGN KEY (UserID) REFERENCES User (UserID) ON DELETE CASCADE,
-    FOREIGN KEY (ProductID) REFERENCES Product (ProductID) ON DELETE SET NULL
+    FOREIGN KEY (ProductID) REFERENCES Product (ProductID) ON DELETE CASCADE
 );
 
 -- Recommendation Entity (Many-to-One with User, Many-to-One with Product)