{"id":446,"date":"2023-10-12T20:29:03","date_gmt":"2023-10-12T12:29:03","guid":{"rendered":"https:\/\/blog.xjfvps.top\/?p=446"},"modified":"2023-10-12T21:11:24","modified_gmt":"2023-10-12T13:11:24","slug":"%e9%a2%86%e5%9f%9f%e9%a9%b1%e5%8a%a8%e8%ae%be%e8%ae%a1%ef%bc%88ddd%ef%bc%89%ef%bc%9a%e5%b0%86%e9%a2%86%e5%9f%9f%e6%a8%a1%e5%9e%8b%e8%9e%8d%e5%85%a5%e5%ae%9e%e9%99%85%e5%ba%94%e7%94%a8%e5%bc%80","status":"publish","type":"post","link":"https:\/\/blog.fs.cloudns.biz\/index.php\/2023\/10\/12\/%e9%a2%86%e5%9f%9f%e9%a9%b1%e5%8a%a8%e8%ae%be%e8%ae%a1%ef%bc%88ddd%ef%bc%89%ef%bc%9a%e5%b0%86%e9%a2%86%e5%9f%9f%e6%a8%a1%e5%9e%8b%e8%9e%8d%e5%85%a5%e5%ae%9e%e9%99%85%e5%ba%94%e7%94%a8%e5%bc%80\/","title":{"rendered":"\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\uff08DDD\uff09\uff1a\u5c06\u9886\u57df\u6a21\u578b\u878d\u5165\u5b9e\u9645\u5e94\u7528\u5f00\u53d1\u7684\u827a\u672f"},"content":{"rendered":"\n

<\/p>\n\n\n\n

\u5728\u8f6f\u4ef6\u5f00\u53d1\u9886\u57df\uff0c\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\uff08Domain-Driven Design\uff0c\u7b80\u79f0DDD\uff09\u662f\u4e00\u79cd\u5f3a\u8c03\u5c06\u4e1a\u52a1\u9886\u57df\u7684\u6a21\u578b\u4e0e\u5b9e\u9645\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u8fc7\u7a0b\u76f8\u7ed3\u5408\u7684\u65b9\u6cd5\u3002DDD\u6709\u52a9\u4e8e\u5f00\u53d1\u56e2\u961f\u66f4\u597d\u5730\u7406\u89e3\u548c\u5904\u7406\u590d\u6742\u7684\u4e1a\u52a1\u9700\u6c42\uff0c\u4ece\u800c\u521b\u5efa\u51fa\u66f4\u52a0\u5065\u58ee\u548c\u9ad8\u8d28\u91cf\u7684\u8f6f\u4ef6\u7cfb\u7edf\u3002<\/p>\n\n\n\n

\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\u7684\u57fa\u672c\u6982\u5ff5<\/strong><\/p>\n\n\n\n

\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\u57fa\u4e8e\u4e00\u4e9b\u6838\u5fc3\u6982\u5ff5\uff1a<\/p>\n\n\n\n

    \n
  1. \u9886\u57df\u6a21\u578b\uff08Domain Model\uff09<\/strong>\uff1a\u9886\u57df\u6a21\u578b\u662f\u5bf9\u4e1a\u52a1\u9886\u57df\u7684\u62bd\u8c61\u8868\u793a\u3002\u5b83\u5305\u62ec\u5b9e\u4f53\uff08Entities\uff09\u3001\u503c\u5bf9\u8c61\uff08Value Objects\uff09\u3001\u805a\u5408\u6839\uff08Aggregate Roots\uff09\u3001\u4ed3\u50a8\uff08Repositories\uff09\u3001\u5de5\u5382\uff08Factories\uff09\u3001\u4e8b\u4ef6\uff08Events\uff09\u548c\u670d\u52a1\uff08Services\uff09\u7b49\u6982\u5ff5\uff0c\u7528\u4e8e\u6355\u6349\u4e1a\u52a1\u9886\u57df\u7684\u5173\u952e\u6982\u5ff5\u548c\u89c4\u5219\u3002<\/li>\n\n\n\n
  2. \u9650\u754c\u4e0a\u4e0b\u6587\uff08Bounded Context\uff09<\/strong>\uff1a\u9650\u754c\u4e0a\u4e0b\u6587\u5b9a\u4e49\u4e86\u9886\u57df\u6a21\u578b\u7684\u8fb9\u754c\uff0c\u4ee5\u786e\u4fdd\u6a21\u578b\u7684\u4e00\u81f4\u6027\u548c\u6e05\u6670\u6027\u3002\u4e00\u4e2a\u5927\u578b\u5e94\u7528\u901a\u5e38\u4f1a\u5305\u542b\u591a\u4e2a\u4e0d\u540c\u7684\u9650\u754c\u4e0a\u4e0b\u6587\uff0c\u6bcf\u4e2a\u4e0a\u4e0b\u6587\u90fd\u6709\u81ea\u5df1\u7684\u9886\u57df\u6a21\u578b\u3002<\/li>\n\n\n\n
  3. \u5b9e\u4f53\uff08Entities\uff09<\/strong>\u5b9e\u4f53\u662f\u5177\u6709\u552f\u4e00\u6807\u8bc6\u7684\u9886\u57df\u5bf9\u8c61\uff0c\u901a\u5e38\u5177\u6709\u751f\u547d\u5468\u671f\u3002\u5728\u7535\u5b50\u5546\u52a1\u7cfb\u7edf\u4e2d\uff0c\u8ba2\u5355<\/code>\u53ef\u4ee5\u662f\u4e00\u4e2a\u5b9e\u4f53\uff0c\u6bcf\u4e2a\u8ba2\u5355\u90fd\u6709\u4e00\u4e2a\u552f\u4e00\u7684\u8ba2\u5355\u53f7\u3002<\/li>\n\n\n\n
  4. \u503c\u5bf9\u8c61\uff08Value Objects\uff09<\/strong>\u503c\u5bf9\u8c61\u662f\u6ca1\u6709\u552f\u4e00\u6807\u8bc6\u7684\u9886\u57df\u5bf9\u8c61\uff0c\u5b83\u4eec\u7684\u76f8\u7b49\u6027\u662f\u6839\u636e\u5c5e\u6027\u7684\u503c\u6765\u5224\u65ad\u7684\u3002\u5728\u7535\u5b50\u5546\u52a1\u7cfb\u7edf\u4e2d\uff0c\u4ea7\u54c1<\/code>\u53ef\u4ee5\u662f\u4e00\u4e2a\u503c\u5bf9\u8c61\uff0c\u56e0\u4e3a\u4ea7\u54c1\u901a\u5e38\u6839\u636e\u5176\u5c5e\u6027\uff08\u540d\u79f0\u3001\u4ef7\u683c\u7b49\uff09\u6765\u533a\u5206\u3002<\/li>\n\n\n\n
  5. \u5de5\u5382\uff08Factories\uff09<\/strong>\u5de5\u5382\u662f\u7528\u4e8e\u521b\u5efa\u9886\u57df\u5bf9\u8c61\u7684\u673a\u5236\u3002\u5728\u7535\u5b50\u5546\u52a1\u7cfb\u7edf\u4e2d\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u8ba2\u5355\u5de5\u5382<\/code>\u6765\u521b\u5efa\u65b0\u7684\u8ba2\u5355\u3002<\/li>\n\n\n\n
  6. \u4e8b\u4ef6\uff08Events\uff09<\/strong>\u4e8b\u4ef6\u8868\u793a\u9886\u57df\u4e2d\u53d1\u751f\u7684\u91cd\u8981\u4e8b\u60c5\u3002\u5728\u7535\u5b50\u5546\u52a1\u7cfb\u7edf\u4e2d\uff0c\u8ba2\u5355\u72b6\u6001\u6539\u53d8\u4e8b\u4ef6<\/code>\u53ef\u4ee5\u8868\u793a\u5f53\u8ba2\u5355\u72b6\u6001\u53d1\u751f\u53d8\u5316\u65f6\u7684\u4e8b\u4ef6\u3002<\/li>\n\n\n\n
  7. \u670d\u52a1\uff08Services\uff09<\/strong>\u670d\u52a1\u662f\u7528\u4e8e\u6267\u884c\u9886\u57df\u4e4b\u5916\u7684\u64cd\u4f5c\u7684\u7ec4\u4ef6\u3002\u5728\u7535\u5b50\u5546\u52a1\u7cfb\u7edf\u4e2d\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u652f\u4ed8\u670d\u52a1<\/code>\u6765\u5904\u7406\u652f\u4ed8\u64cd\u4f5c\uff0c\u56e0\u4e3a\u652f\u4ed8\u901a\u5e38\u6d89\u53ca\u5916\u90e8\u7cfb\u7edf<\/li>\n\n\n\n
  8. \u4ed3\u5e93\uff08Repository\uff09<\/strong>\uff1a\u4ed3\u5e93\u662f\u7528\u4e8e\u7ba1\u7406\u9886\u57df\u5bf9\u8c61\u7684\u6301\u4e45\u6027\u7684\u673a\u5236\u3002\u5b83\u5141\u8bb8\u4ece\u6570\u636e\u5e93\u6216\u5176\u4ed6\u6301\u4e45\u6027\u5b58\u50a8\u4e2d\u68c0\u7d22\u548c\u5b58\u50a8\u9886\u57df\u5bf9\u8c61\u3002<\/li>\n<\/ol>\n\n\n\n

    <\/p>\n\n\n\n

    \u793a\u4f8b\uff1a\u7535\u5b50\u5546\u52a1\u7cfb\u7edf\u4e2d\u7684DDD\u5e94\u7528<\/strong><\/p>\n\n\n\n

    1. \u9886\u57df\u6a21\u578b\u7684\u6784\u5efa<\/strong><\/p>\n\n\n\n

    \u5728\u7535\u5b50\u5546\u52a1\u7cfb\u7edf\u4e2d\uff0c\u6211\u4eec\u6709\u4e0d\u540c\u7684\u9886\u57df\u6a21\u578b\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u6709\u8ba2\u5355<\/code>\u3001\u4ea7\u54c1<\/code>\u3001\u8d2d\u7269\u8f66<\/code>\u7b49\u6982\u5ff5\u3002\u901a\u8fc7DDD\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u8fd9\u4e9b\u9886\u57df\u6a21\u578b\u5e76\u5b9a\u4e49\u5b83\u4eec\u4e4b\u95f4\u7684\u5173\u7cfb\u3002<\/p>\n\n\n\n

    <\/p>\n\n\n\n

    \/\/ \u5b9e\u4f53\uff08Entity\uff09- \u8ba2\u5355\u9886\u57df\u6a21\u578b\ntype Order struct {\n    ID        int\n    Items     []OrderItem\n    Status    OrderStatus\n    Customer  Customer\n    \/\/ \u66f4\u591a\u5c5e\u6027\u548c\u65b9\u6cd5\n}\n\n\/\/ \u503c\u5bf9\u8c61\uff08Value Object\uff09- \u4ea7\u54c1\u9886\u57df\u6a21\u578b\ntype Product struct {\n    ID       int\n    Name     string\n    Price    float64\n    Quantity int\n    \/\/ \u66f4\u591a\u5c5e\u6027\u548c\u65b9\u6cd5\n}\n\n\/\/ \u5de5\u5382\uff08Factory\uff09- \u521b\u5efa\u8ba2\u5355\nfunc NewOrder(customer Customer) *Order {\n    \/\/ \u521b\u5efa\u8ba2\u5355\u7684\u903b\u8f91...\n}\n\n\/\/ \u4e8b\u4ef6\uff08Event\uff09- \u8ba2\u5355\u72b6\u6001\u6539\u53d8\u4e8b\u4ef6\ntype OrderStatusChangedEvent struct {\n    OrderID int\n    NewStatus OrderStatus\n    \/\/ \u5176\u4ed6\u4e8b\u4ef6\u6570\u636e...\n}\n\n\/\/ \u670d\u52a1\uff08Service\uff09- \u652f\u4ed8\u670d\u52a1\ntype PaymentService struct {\n    \/\/ \u652f\u4ed8\u670d\u52a1\u7684\u4f9d\u8d56\u548c\u65b9\u6cd5...\n}\n\n<\/pre>\n\n\n\n
    2. \u9650\u754c\u4e0a\u4e0b\u6587\u7684\u5212\u5206<\/strong><\/p>\n\n\n\n
    \u5728\u7535\u5b50\u5546\u52a1\u7cfb\u7edf\u4e2d\uff0c\u4e0d\u540c\u7684\u9886\u57df\u6a21\u578b\u53ef\u80fd\u5728\u4e0d\u540c\u4e0a\u4e0b\u6587\u4e2d\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u8ba2\u5355\u548c\u4ea7\u54c1\u7ba1\u7406\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u9650\u754c\u4e0a\u4e0b\u6587\u3002\u8fd9\u4e9b\u4e0a\u4e0b\u6587\u6709\u81ea\u5df1\u7684\u9886\u57df\u6a21\u578b\u548c\u8bed\u8a00\uff0c\u4f46\u5b83\u4eec\u53ef\u4ee5\u76f8\u4e92\u901a\u4fe1\u3002<\/p>\n\n\n\n
    3. \u4ed3\u50a8\u7684\u5e94\u7528<\/strong><\/p>\n\n\n\n
    \u4ed3\u50a8\u662f\u7528\u4e8e\u5904\u7406\u9886\u57df\u5bf9\u8c61\u7684\u6301\u4e45\u6027\u7684\u673a\u5236\u3002\u5728DDD\u4e2d\uff0c\u4ed3\u50a8\u5141\u8bb8\u6211\u4eec\u4ece\u6570\u636e\u5e93\u6216\u5176\u4ed6\u6301\u4e45\u6027\u5b58\u50a8\u4e2d\u68c0\u7d22\u548c\u5b58\u50a8\u9886\u57df\u5bf9\u8c61\u3002<\/p>\n\n\n\n
    \/\/ \u4ed3\u50a8\u63a5\u53e3\ntype OrderRepository interface {\n    GetByID(id int) (*Order, error)\n    Save(order *Order) error\n}\n\n\/\/ \u5b9e\u73b0\u8ba2\u5355\u4ed3\u50a8\ntype OrderRepositoryImpl struct {\n    \/\/ \u6570\u636e\u5e93\u8fde\u63a5\u6216\u5176\u4ed6\u5b58\u50a8\u673a\u5236\n}\n\nfunc (r *OrderRepositoryImpl) GetByID(id int) (*Order, error) {\n    \/\/ \u4ece\u6570\u636e\u5e93\u4e2d\u83b7\u53d6\u8ba2\u5355\n    \/\/ \u8fd4\u56de\u9886\u57df\u5bf9\u8c61\n}\n\nfunc (r *OrderRepositoryImpl) Save(order *Order) error {\n    \/\/ \u5c06\u8ba2\u5355\u4fdd\u5b58\u5230\u6570\u636e\u5e93\n}\n<\/pre>\n\n\n\n
    4. \u4e1a\u52a1\u89c4\u5219\u7684\u4f53\u73b0<\/strong><\/p>\n\n\n\n
    \u901a\u8fc7DDD\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4e1a\u52a1\u89c4\u5219\u5d4c\u5165\u5230\u9886\u57df\u6a21\u578b\u4e2d\u3002\u4f8b\u5982\uff0c\u5728\u8ba2\u5355\u9886\u57df\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e9b\u89c4\u5219\uff0c\u5982\u8ba2\u5355\u5fc5\u987b\u5305\u542b\u6709\u6548\u7684\u4ea7\u54c1\u3001\u8ba2\u5355\u72b6\u6001\u5fc5\u987b\u5408\u6cd5\u7b49\u3002\u8fd9\u4e9b\u89c4\u5219\u53ef\u4ee5\u901a\u8fc7\u9886\u57df\u6a21\u578b\u7684\u65b9\u6cd5\u6765\u6267\u884c\u3002<\/p>\n\n\n\n
    \/\/ \u8ba2\u5355\u9886\u57df\u6a21\u578b\u7684\u65b9\u6cd5\nfunc (o *Order) AddItem(product Product, quantity int) error {\n    if quantity <= 0 {\n        return errors.New(\"Quantity must be greater than 0\")\n    }\n    \/\/ \u68c0\u67e5\u5176\u4ed6\u89c4\u5219...\n    \/\/ \u66f4\u65b0\u8ba2\u5355\u5185\u5bb9...\n    return nil\n}\n<\/pre>\n\n\n\n
    5. \u9886\u57df\u6a21\u578b\u7684\u6d4b\u8bd5<\/strong><\/p>\n\n\n\n
    \u5728DDD\u4e2d\uff0c\u6211\u4eec\u901a\u5e38\u4f1a\u7f16\u5199\u6d4b\u8bd5\u6765\u9a8c\u8bc1\u9886\u57df\u6a21\u578b\u7684\u884c\u4e3a\u662f\u5426\u7b26\u5408\u4e1a\u52a1\u89c4\u5219\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u7f16\u5199\u6d4b\u8bd5\u6765\u786e\u4fdd\u8ba2\u5355\u9886\u57df\u6a21\u578b\u5728\u6dfb\u52a0\u5546\u54c1\u65f6\u4f1a\u6b63\u786e\u5904\u7406\u5404\u79cd\u60c5\u51b5\u3002<\/p>\n\n\n\n
    func TestOrder_AddItem(t *testing.T) {\n    order := &Order{}\n    product := Product{ID: 1, Name: \"Example Product\", Price: 10.0, Quantity: 100}\n    \n    \/\/ \u6d4b\u8bd5\u6dfb\u52a0\u5546\u54c1\n    err := order.AddItem(product, 5)\n    assert.Nil(t, err)\n    \n    \/\/ \u6d4b\u8bd5\u975e\u6cd5\u6570\u91cf\n    err = order.AddItem(product, -1)\n    assert.NotNil(t, err)\n    \/\/ \u5176\u4ed6\u6d4b\u8bd5...\n}\n<\/pre>\n\n\n\n
     <\/p>\n\n\n\n
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