101 lines
2.8 KiB
Python
101 lines
2.8 KiB
Python
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import sqlite3
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class ProductDatabase:
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def __init__(self, db_file):
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"""Initialize the ProductDatabase with a connection to the SQLite database."""
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self.conn = sqlite3.connect(db_file)
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def add_product(self, product):
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"""Add a new product to the products table."""
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sql = "INSERT INTO products (name, price, quantity) VALUES (?, ?, ?)"
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try:
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c = self.conn.cursor()
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c.execute(sql, product)
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self.conn.commit()
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return c.lastrowid
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except sqlite3.Error as e:
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print(e)
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def get_product_by_id(self, product_id):
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"""Retrieve a product by its ID."""
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sql = "SELECT * FROM products WHERE id = ?"
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try:
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c = self.conn.cursor()
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c.execute(sql, (product_id,))
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return c.fetchone()
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except sqlite3.Error as e:
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print(e)
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return None
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def get_all_products(self):
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"""Retrieve all products."""
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sql = "SELECT * FROM products"
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try:
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c = self.conn.cursor()
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c.execute(sql)
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return c.fetchall()
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except sqlite3.Error as e:
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print(e)
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return []
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def update_product(self, product_id, product_data):
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"""Update a product's information."""
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sql = "UPDATE products SET name = ?, price = ?, quantity = ? WHERE id = ?"
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try:
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c = self.conn.cursor()
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c.execute(sql, (*product_data, product_id))
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self.conn.commit()
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except sqlite3.Error as e:
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print(e)
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def delete_product(self, product_id):
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"""Delete a product by its ID."""
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sql = "DELETE FROM products WHERE id = ?"
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try:
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c = self.conn.cursor()
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c.execute(sql, (product_id,))
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self.conn.commit()
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except sqlite3.Error as e:
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print(e)
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def main():
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database = "db/shop.db"
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product_db = ProductDatabase(database)
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# delete all products
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for product in product_db.get_all_products():
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product_db.delete_product(product[0])
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# name, price, quantity
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products = [("Apel", 2.5, 5),
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("Banana", 1.5, 10),
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("Orange", 3.2, 7)]
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for product in products:
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product_db.add_product(product)
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products = product_db.get_all_products()
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print("All products:")
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for product in products:
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print(product)
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# name, price, quantity
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product_data = ("Orange", 3.0, 5)
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product_db.update_product(3, product_data)
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product = product_db.get_product_by_id(1)
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print("Updated product:")
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print(product)
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product_db.delete_product(2)
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print("Product deleted")
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products = product_db.get_all_products()
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print("All products:")
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for product in products:
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print(product)
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if __name__ == "__main__":
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main()
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