Spaces:
Build error
Build error
File size: 11,569 Bytes
078556c |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 |
import sqlite3
import os
# Define the path for the database
DB_DIR = "data"
DB_PATH = os.path.join(DB_DIR, "ecommerce_data.db")
def get_db_connection():
"""Establishes a connection to the SQLite database."""
if not os.path.exists(DB_PATH):
raise FileNotFoundError(f"Database file not found at {DB_PATH}. Run generate_data.py first.")
conn = sqlite3.connect(DB_PATH)
conn.row_factory = sqlite3.Row # Return rows as dictionary-like objects
return conn
def get_order_details(order_id):
"""Fetches details for a specific order."""
conn = get_db_connection()
cursor = conn.cursor()
cursor.execute("""
SELECT o.order_id, o.order_date, o.status, o.total_amount, u.name as user_name, u.email
FROM orders o
JOIN users u ON o.user_id = u.user_id
WHERE o.order_id = ?
""", (order_id,))
order = cursor.fetchone()
conn.close()
return dict(order) if order else None
def get_order_items(order_id):
"""Fetches all items associated with a specific order."""
conn = get_db_connection()
cursor = conn.cursor()
cursor.execute("""
SELECT p.name as product_name, oi.quantity, oi.price_per_unit
FROM order_items oi
JOIN products p ON oi.product_id = p.product_id
WHERE oi.order_id = ?
""", (order_id,))
items = cursor.fetchall()
conn.close()
return [dict(item) for item in items]
def get_user_recent_orders(user_id, limit=5):
"""Fetches the most recent orders for a specific user."""
conn = get_db_connection()
cursor = conn.cursor()
cursor.execute("""
SELECT order_id, order_date, status, total_amount
FROM orders
WHERE user_id = ?
ORDER BY order_date DESC
LIMIT ?
""", (user_id, limit))
orders = cursor.fetchall()
conn.close()
return [dict(order) for order in orders]
def remove_order_details(order_id):
"""Removes order details from the database for a given order_id."""
conn = get_db_connection()
cursor = conn.cursor()
try:
cursor.execute("DELETE FROM order_items WHERE order_id = ?", (order_id,))
conn.commit()
conn.close()
return True
except sqlite3.Error as e:
conn.rollback()
conn.close()
print(f"Database error removing order details: {e}")
return False
def remove_order(order_id):
"""Removes an order from the database."""
conn = get_db_connection()
cursor = conn.cursor()
try:
cursor.execute("DELETE FROM orders WHERE order_id = ?", (order_id,))
conn.commit()
conn.close()
return True
except sqlite3.Error as e:
conn.rollback()
conn.close()
print(f"Database error removing order: {e}")
return False
def remove_user(user_id):
"""Removes a user from the database."""
conn = get_db_connection()
cursor = conn.cursor()
try:
cursor.execute("DELETE FROM users WHERE user_id = ?", (user_id,))
conn.commit()
conn.close()
return True
except sqlite3.Error as e:
conn.rollback()
conn.close()
print(f"Database error removing user: {e}")
return False
def add_product(name, description, price, stock):
"""Adds a new product to the database."""
conn = get_db_connection()
cursor = conn.cursor()
try:
cursor.execute("""
INSERT INTO products (name, description, price, stock)
VALUES (?, ?, ?, ?)
""", (name, description, price, stock))
conn.commit()
product_id = cursor.lastrowid
conn.close()
return product_id # Return the ID of the newly added product
except sqlite3.Error as e:
conn.rollback() # Roll back changes if error occurs
conn.close()
print(f"Database error adding product: {e}")
return None # Indicate failure
def add_user(name, email, address):
"""Adds a new user to the database."""
conn = get_db_connection()
cursor = conn.cursor()
try:
cursor.execute("""
INSERT INTO users (name, email, address)
VALUES (?, ?, ?)
""", (name, email, address))
conn.commit()
user_id = cursor.lastrowid
conn.close()
return user_id
except sqlite3.Error as e:
conn.rollback()
conn.close()
print(f"Database error adding user: {e}")
return None
def add_order(user_id, order_date, status, total_amount):
"""Adds a new order to the database."""
conn = get_db_connection()
cursor = conn.cursor()
try:
cursor.execute("""
INSERT INTO orders (user_id, order_date, status, total_amount)
VALUES (?, ?, ?, ?)
""", (user_id, order_date, status, total_amount))
conn.commit()
order_id = cursor.lastrowid
conn.close()
return order_id
except sqlite3.Error as e:
conn.rollback()
conn.close()
print(f"Database error adding order: {e}")
return None
def add_order_item(order_id, product_id, quantity, price_per_unit):
"""Adds a new order item to the database."""
conn = get_db_connection()
cursor = conn.cursor()
try:
cursor.execute("""
INSERT INTO order_items (order_id, product_id, quantity, price_per_unit)
VALUES (?, ?, ?, ?)
""", (order_id, product_id, quantity, price_per_unit))
conn.commit()
order_item_id = cursor.lastrowid
conn.close()
return order_item_id
except sqlite3.Error as e:
conn.rollback()
conn.close()
print(f"Database error adding order item: {e}")
return None
def get_all_order_details():
"""Fetches all order details from the database."""
conn = get_db_connection()
cursor = conn.cursor()
cursor.execute("SELECT order_id, product_id, quantity, price_per_unit FROM order_items ORDER BY order_id")
order_details = cursor.fetchall()
conn.close()
return [dict(order_detail) for order_detail in order_details]
def get_user_by_email(email):
"""Fetches user details by email address."""
conn = get_db_connection()
cursor = conn.cursor()
cursor.execute("SELECT user_id, name, email, address FROM users WHERE email = ?", (email,))
user = cursor.fetchone()
conn.close()
return dict(user) if user else None
def get_all_products():
"""Fetches all products from the database."""
conn = get_db_connection()
cursor = conn.cursor()
cursor.execute("SELECT product_id, name, description, price, stock FROM products ORDER BY product_id")
products = cursor.fetchall()
conn.close()
return [dict(product) for product in products]
# Example usage (optional, for testing)
if __name__ == "__main__":
print("Testing Data Manager...")
# Ensure data exists first by running generate_data.py if needed
if not os.path.exists(DB_PATH):
print("Database not found. Please run generate_data.py first.")
else:
test_order_id = 1
print(f"\n--- Order Details (ID: {test_order_id}) ---")
details = get_order_details(test_order_id)
if details:
print(details)
print(f"\n--- Items for Order ID: {test_order_id} ---")
items = get_order_items(test_order_id)
for item in items:
print(item)
else:
print(f"Order {test_order_id} not found.")
test_user_id = 1
print(f"\n--- Recent Orders for User ID: {test_user_id}) ---")
recent_orders = get_user_recent_orders(test_user_id)
if recent_orders:
for order in recent_orders:
print(order)
else:
print(f"No orders found for user {test_user_id}.")
test_email = 'alice@example.com'
print(f"\n--- User details for Email: {test_email} ---")
user = get_user_by_email(test_email)
if user:
print(user)
else:
print(f"User with email {test_email} not found.")
print("\n--- All Products ---")
all_products = get_all_products()
if all_products:
for prod in all_products[:5]: # Print first 5
print(prod)
else:
print("No products found.")
# Example Add/Remove (Use with caution on real data)
# print("\n--- Adding Test Product ---")
# new_id = add_product("Test Widget", "A temporary test product", 99.99, 50)
# if new_id:
# print(f"Added product with ID: {new_id}")
# print("\n--- Removing Test Product ---")
# removed = remove_product(new_id)
# print(f"Removal successful: {removed}")
# else:
# print("Failed to add test product.")
def get_all_order_details():
"""Fetches all order details from the database."""
conn = get_db_connection()
cursor = conn.cursor()
cursor.execute("SELECT order_id, product_id, quantity, price_per_unit FROM order_items ORDER BY order_id")
order_details = cursor.fetchall()
conn.close()
return [dict(order_detail) for order_detail in order_details]
def remove_user(user_id):
"""Removes a user from the database."""
conn = get_db_connection()
cursor = conn.cursor()
try:
cursor.execute("DELETE FROM users WHERE user_id = ?", (user_id,))
conn.commit()
conn.close()
return True
except sqlite3.Error as e:
conn.rollback()
conn.close()
print(f"Database error removing user: {e}")
return False
def remove_order(order_id):
"""Removes an order from the database."""
conn = get_db_connection()
cursor = conn.cursor()
try:
cursor.execute("DELETE FROM orders WHERE order_id = ?", (order_id,))
conn.commit()
conn.close()
return True
except sqlite3.Error as e:
conn.rollback()
conn.close()
print(f"Database error removing order: {e}")
return False
def remove_order_details(order_id):
"""Removes order details from the database for a given order_id."""
conn = get_db_connection()
cursor = conn.cursor()
try:
cursor.execute("DELETE FROM order_items WHERE order_id = ?", (order_id,))
conn.commit()
conn.close()
return True
except sqlite3.Error as e:
conn.rollback()
conn.close()
print(f"Database error removing order details: {e}")
return False
def get_all_users():
"""Fetches all users from the database."""
conn = get_db_connection()
cursor = conn.cursor()
cursor.execute("SELECT user_id, name, email, address FROM users ORDER BY user_id")
users = cursor.fetchall()
conn.close()
return [dict(user) for user in users]
def get_all_orders():
"""Fetches all orders from the database."""
conn = get_db_connection()
cursor = conn.cursor()
cursor.execute("SELECT order_id, user_id, order_date, status, total_amount FROM orders ORDER BY order_id")
orders = cursor.fetchall()
conn.close()
return [dict(order) for order in orders]
|