Question

我希望创建一个能够处理多个类别的MySQL商店。我有所有的类别设施等等，但我没有得到任何地方的位是这个..

每件商品都有多个选项，例如T恤衫应该有“颜色”和“尺码”选项。然后我需要从父产品中创建许多变体/派生产品，指定特大号蓝色T恤有20个库存（例如）。问题是，它不仅仅是出售的衣服，它可以是任何数量的东西。所以我还需要这个架构能够处理无数种变体，例如' 6mm '大'生日卡与'跑车'设计。 6mm，大，'Ace'是变量。这样我就能确保我们没有任何库存控制问题。如果它对你有用，下面是我目前的网站结构。

Existing Database Schema http://www.hallwaystudios.com/screenshots/uploads/g5B7SNKU.png

我希望你理解我的意思，并且有人能解答我的问题！非常感谢（以及之后的）

Answer 1

不太清楚这里的问题是什么......我可能会创建四个表：

-- a table of item types (t-shirt, birthday card, etc.)
CREATE TABLE ItemTypes (
  TypeID      INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  TypeName    VARCHAR(20) NOT NULL
);

-- a table of associated properties
CREATE TABLE TypeProperties (
  PropertyID  INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  TypeID      INT NOT NULL,
  PropName    VARCHAR(20) NOT NULL,
  INDEX(Property, TypeID),
  FOREIGN KEY(TypeID) REFERENCES ItemTypes(TypeID)
);

-- a table of specific items (XL Blue t-shirt, large bday card w/sports car, etc.)
CREATE TABLE Items (
  ItemID      INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  TypeID      INT NOT NULL,
  ItemName    VARCHAR(100) NOT NULL,
  ItemPrice   DECIMAL UNSIGNED NOT NULL,
  ItemStock   INT UNSIGNED NOT NULL,
  INDEX(ItemID, TypeID),
  FOREIGN KEY(TypeID) REFERENCES ItemTypes(TypeID)
);

-- the dictionary of property values
CREATE TABLE ItemProperties (
  ItemID      INT NOT NULL,
  TypeID      INT NOT NULL,
  PropertyID  INT NOT NULL,
  Value       VARCHAR(20) NOT NULL,
  PRIMARY KEY(ItemID, Property),
  INDEX(ItemID,     TypeID),
  INDEX(PropertyID, TypeID),
  FOREIGN KEY(            TypeID) REFERENCES ItemTypes     (            TypeID),
  FOREIGN KEY(ItemID,     TypeID) REFERENCES Items         (ItemID,     TypeID),
  FOREIGN KEY(PropertyID, TypeID) REFERENCES TypeProperties(PropertyID, TypeID)
);

它应该是相当明显的，但为了以防万一，示例数据看起来像：

INSERT INTO ItemTypes (TypeID, TypeName) VALUES
  (1, 'T-Shirt'      ),
  (2, 'Birthday Card'),
  (3, 'Balloon'      );

INSERT INTO TypeProperties(PropertyID, TypeID, PropName) VALUES
  (51, 1, 'Colour' ), (52, 1, 'Size'),
  (53, 2, 'Size/mm'), (54, 2, 'Size'), (55, 2, 'Design'),
  (56, 3, 'Colour' );

INSERT INTO Items (ItemID, TypeID, ItemName, ItemPrice, ItemStock) VALUES
  (101, 1, 'Extra Large Blue T-Shirt',                       10.99, 20),
  (102, 2, '6mm Large Birthday Card with Sports Car Design',  2.99, 17),
  (103, 1, 'Extra Large Black T-Shirt',                      10.99,  5),
  (104, 3, 'Pink balloon',                                    0.10, 60);

INSERT INTO ItemProperties (ItemID, TypeID, PropertyID, Value) VALUES
  (101, 1, 51, 'Blue'       ),
  (101, 1, 52, 'Extra Large'),
  (102, 2, 53, '6'          ),
  (102, 2, 54, 'Large'      ),
  (102, 2, 55, 'Sports Car' ),
  (103, 1, 51, 'Black'      ),
  (103, 1, 52, 'Extra Large'),
  (104, 3, 56, 'Pink'       );

MySQL购物车结构

1 个答案: