{"id":1544,"date":"2026-04-10T10:27:37","date_gmt":"2026-04-10T02:27:37","guid":{"rendered":"https:\/\/mayaharper.showcasingme.net\/vn\/when-to-use-uml-object-diagrams-decision-checklist\/"},"modified":"2026-04-10T10:27:37","modified_gmt":"2026-04-10T02:27:37","slug":"when-to-use-uml-object-diagrams-decision-checklist","status":"publish","type":"post","link":"https:\/\/mayaharper.showcasingme.net\/vn\/when-to-use-uml-object-diagrams-decision-checklist\/","title":{"rendered":"Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng UML: Danh s\u00e1ch ki\u1ec3m tra quy\u1ebft \u0111\u1ecbnh"},"content":{"rendered":"

Ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o tr\u1eebu t\u01b0\u1ee3ng tr\u1ef1c quan. Trong khi nhi\u1ec1u nh\u00f3m m\u1eb7c \u0111\u1ecbnh s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 l\u1edbp \u0111\u1ec3 th\u1ec3 hi\u1ec7n c\u1ea5u tr\u00fac, th\u00ec c\u00f3 m\u1ed9t t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3 m\u00e0 m\u1ed9t c\u00e1ch nh\u00ecn kh\u00e1c l\u1ea1i tr\u1edf n\u00ean quan tr\u1ecdng. S\u01a1 \u0111\u1ed3 S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng UML<\/strong> \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t b\u1ee9c \u1ea3nh ch\u1ee5p l\u1ea1i h\u1ec7 th\u1ed1ng t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3. N\u00f3 m\u00f4 t\u1ea3 c\u00e1c th\u1ec3 hi\u1ec7n c\u1ee7a l\u1edbp, c\u00e1c li\u00ean k\u1ebft gi\u1eefa ch\u00fang, v\u00e0 c\u00e1c gi\u00e1 tr\u1ecb d\u1eef li\u1ec7u th\u1ef1c t\u1ebf \u0111ang l\u01b0u th\u00f4ng qua ki\u1ebfn tr\u00fac. Hi\u1ec3u \u0111\u01b0\u1ee3c khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 n\u00e0y l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 duy tr\u00ec s\u1ef1 r\u00f5 r\u00e0ng m\u00e0 kh\u00f4ng l\u00e0m cho \u0111\u1ed9 ph\u1ee9c t\u1ea1p tr\u1edf n\u00ean qu\u00e1 t\u1ea3i.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y cung c\u1ea5p c\u00e1i nh\u00ecn to\u00e0n di\u1ec7n v\u1ec1 l\u1ee3i \u00edch, c\u00e1c th\u00e0nh ph\u1ea7n v\u00e0 c\u00e1c ti\u00eau ch\u00ed quy\u1ebft \u0111\u1ecbnh khi s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng. Ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n, v\u00e0 nh\u1eefng th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3 m\u00e0 lo\u1ea1i s\u01a1 \u0111\u1ed3 n\u00e0y mang l\u1ea1i hi\u1ec7u qu\u1ea3 \u0111\u1ea7u t\u01b0 cao nh\u1ea5t cho c\u00f4ng vi\u1ec7c t\u00e0i li\u1ec7u h\u00f3a v\u00e0 thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n.<\/p>\n

\"Cartoon<\/figure>\n

Hi\u1ec3u r\u00f5 m\u1ee5c \u0111\u00edch c\u1ed1t l\u00f5i \ud83c\udfaf<\/h2>\n

Tr\u01b0\u1edbc khi quy\u1ebft \u0111\u1ecbnh t\u1ea1o s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng, c\u1ea7n ph\u1ea3i hi\u1ec3u b\u1ea3n ch\u1ea5t c\u1ed1t l\u00f5i c\u1ee7a n\u00f3. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t S\u01a1 \u0111\u1ed3 th\u1ec3 hi\u1ec7n<\/em>. Trong khi s\u01a1 \u0111\u1ed3 l\u1edbp \u0111\u1ecbnh ngh\u0129a b\u1ea3n v\u1ebd thi\u1ebft k\u1ebf<\/em>\u2014c\u00e1c ki\u1ec3u, thu\u1ed9c t\u00ednh v\u00e0 thao t\u00e1c c\u00f3 s\u1eb5n\u2014th\u00ec s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ecbnh ngh\u0129a th\u1ef1c t\u1ebf<\/em> t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3.<\/p>\n

H\u00e3y h\u00ecnh dung s\u01a1 \u0111\u1ed3 l\u1edbp nh\u01b0 b\u1ea3n v\u1ebd ki\u1ebfn tr\u00fac c\u1ee7a m\u1ed9t th\u00e0nh ph\u1ed1. N\u00f3 cho th\u1ea5y \u0111\u01b0\u1eddng \u0111i \u0111\u00e2u, c\u00e1c t\u00f2a nh\u00e0 n\u1eb1m \u1edf \u0111\u00e2u, v\u00e0 lo\u1ea1i c\u00f4ng tr\u00ecnh n\u00e0o \u0111\u01b0\u1ee3c ph\u00e9p x\u00e2y d\u1ef1ng. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 m\u1ed9t b\u1ee9c \u1ea3nh ch\u1ee5p th\u00e0nh ph\u1ed1 \u0111\u00f3 v\u00e0o l\u00fac 2 gi\u1edd chi\u1ec1u th\u1ee9 Ba. N\u00f3 cho th\u1ea5y nh\u1eefng chi\u1ebfc xe c\u1ee5 th\u1ec3 tr\u00ean \u0111\u01b0\u1eddng, nh\u1eefng ng\u01b0\u1eddi c\u1ee5 th\u1ec3 trong c\u00e1c t\u00f2a nh\u00e0, v\u00e0 lu\u1ed3ng giao th\u00f4ng ch\u00ednh x\u00e1c t\u1ea1i th\u1eddi \u0111i\u1ec3m \u0111\u00f3.<\/p>\n

Nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh bao g\u1ed3m:<\/p>\n

    \n
  • B\u1ee9c \u1ea3nh t\u0129nh:<\/strong> N\u00f3 ghi l\u1ea1i tr\u1ea1ng th\u00e1i c\u1ee7a h\u1ec7 th\u1ed1ng t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3.<\/li>\n
  • C\u00e1c th\u1ec3 hi\u1ec7n c\u1ee5 th\u1ec3:<\/strong> N\u00f3 s\u1eed d\u1ee5ng t\u00ean c\u1ee5 th\u1ec3 cho c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng (v\u00ed d\u1ee5: user_101<\/code>), kh\u00f4ng ch\u1ec9 l\u00e0 c\u00e1c ki\u1ec3u chung chung (v\u00ed d\u1ee5: User<\/code>).<\/li>\n
  • C\u00e1c m\u1ed1i quan h\u1ec7 li\u00ean k\u1ebft:<\/strong> N\u00f3 th\u1ec3 hi\u1ec7n c\u00e1c k\u1ebft n\u1ed1i th\u1ef1c t\u1ebf gi\u1eefa c\u00e1c th\u1ec3 hi\u1ec7n c\u1ee5 th\u1ec3 n\u00e0y.<\/li>\n
  • C\u00e1c gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh:<\/strong> N\u00f3 c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef b\u00ean trong c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng.<\/li>\n<\/ul>\n

    C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \ud83e\udde9<\/h2>\n

    \u0110\u1ec3 s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 n\u00e0y m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, b\u1ea1n ph\u1ea3i quen thu\u1ed9c v\u1edbi c\u00fa ph\u00e1p c\u1ee7a n\u00f3. Kh\u00e1c v\u1edbi m\u1ed9t s\u1ed1 k\u00fd hi\u1ec7u thay \u0111\u1ed5i theo th\u1eddi gian, UML v\u1eabn duy tr\u00ec s\u1ef1 nh\u1ea5t qu\u00e1n trong c\u00e1ch bi\u1ec3u di\u1ec5n c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng. C\u00e1c th\u00e0nh ph\u1ea7n sau \u0111\u00e2y t\u1ea1o n\u00ean n\u1ec1n t\u1ea3ng c\u1ee7a s\u01a1 \u0111\u1ed3:<\/p>\n

    1. C\u00e1c th\u1ec3 hi\u1ec7n \u0111\u1ed1i t\u01b0\u1ee3ng<\/h3>\n

    M\u1ed7i h\u00ecnh ch\u1eef nh\u1eadt \u0111\u1ea1i di\u1ec7n cho m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng. T\u00ean \u0111\u01b0\u1ee3c g\u1ea1ch ch\u00e2n, cho th\u1ea5y \u0111\u00e2y l\u00e0 m\u1ed9t th\u1ec3 hi\u1ec7n, kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t l\u1edbp. Th\u00f4ng th\u01b0\u1eddng, n\u00f3 tu\u00e2n theo \u0111\u1ecbnh d\u1ea1ng t\u00ean\u0110\u1ed1iT\u01b0\u1ee3ng : T\u00eanL\u1edbp<\/code>. V\u00ed d\u1ee5, sessionA : Gi\u1ecfH\u00e0ng<\/code>.<\/p>\n

    2. Li\u00ean k\u1ebft<\/h3>\n

    C\u00e1c \u0111\u01b0\u1eddng n\u1ed1i gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ea1i di\u1ec7n cho c\u00e1c m\u1ed1i quan h\u1ec7. \u0110\u00e2y l\u00e0 c\u00e1c th\u1ec3 hi\u1ec7n \u0111ang ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c m\u1ed1i li\u00ean k\u1ebft \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong s\u01a1 \u0111\u1ed3 L\u1edbp. Ch\u00fang cho th\u1ea5y c\u00e1ch c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee5 th\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau.<\/p>\n

    3. \u0110a d\u1ea1ng<\/h3>\n

    Gi\u1ed1ng nh\u01b0 trong s\u01a1 \u0111\u1ed3 L\u1edbp, c\u00e1c li\u00ean k\u1ebft c\u00f3 r\u00e0ng bu\u1ed9c \u0111a d\u1ea1ng. Nh\u1eefng r\u00e0ng bu\u1ed9c n\u00e0y cho bi\u1ebft c\u00f3 bao nhi\u00eau th\u1ec3 hi\u1ec7n c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c v\u00e0o th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3 n\u00e0y. C\u00e1c k\u00fd hi\u1ec7u ph\u1ed5 bi\u1ebfn bao g\u1ed3m 1<\/code>, 0..1<\/code>, v\u00e0 1..*<\/code>.<\/p>\n

    4. Gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh<\/h3>\n

    M\u1ed9t trong nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a s\u01a1 \u0111\u1ed3 \u0110\u1ed1i t\u01b0\u1ee3ng l\u00e0 kh\u1ea3 n\u0103ng hi\u1ec3n th\u1ecb tr\u1ea1ng th\u00e1i th\u1ef1c t\u1ebf. B\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y s\u1ed1D\u01b0: $50.00<\/code> b\u00ean trong h\u1ed9p \u0111\u1ed1i t\u01b0\u1ee3ng, cung c\u1ea5p b\u1ed1i c\u1ea3nh ngay l\u1eadp t\u1ee9c v\u1ec1 c\u00e1c gi\u00e1 tr\u1ecb d\u1eef li\u1ec7u.<\/p>\n

    B\u1ea3ng ki\u1ec3m quy\u1ebft \u0111\u1ecbnh: Khi n\u00e0o n\u00ean t\u1ea1o m\u1ed9t b\u1ea3n \u0111\u1ed3?<\/h2>\n

    Kh\u00f4ng ph\u1ea3i d\u1ef1 \u00e1n n\u00e0o c\u0169ng c\u1ea7n s\u01a1 \u0111\u1ed3 \u0110\u1ed1i t\u01b0\u1ee3ng. Vi\u1ec7c t\u1ea1o ra m\u1ed9t s\u01a1 \u0111\u1ed3 nh\u01b0 v\u1eady \u0111\u00f2i h\u1ecfi n\u1ed7 l\u1ef1c v\u00e0 b\u1ea3o tr\u00ec. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 danh s\u00e1ch ki\u1ec3m tra chi ti\u1ebft \u0111\u1ec3 gi\u00fap b\u1ea1n x\u00e1c \u0111\u1ecbnh xem giai \u0111o\u1ea1n hi\u1ec7n t\u1ea1i trong v\u00f2ng \u0111\u1eddi ph\u00e1t tri\u1ec3n c\u1ee7a b\u1ea1n c\u00f3 \u0111\u00e1ng \u0111\u1ec3 t\u1ea1o ra t\u00e0i li\u1ec7u n\u00e0y hay kh\u00f4ng.<\/p>\n

    Ti\u00eau ch\u00ed s\u1eed d\u1ee5ng<\/h3>\n\n\n\n\n\n\n\n\n\n
    Y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh<\/th>\nC\u00f3 (S\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0110\u1ed1i t\u01b0\u1ee3ng)<\/th>\nKh\u00f4ng (Tr\u00e1nh s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0110\u1ed1i t\u01b0\u1ee3ng)<\/th>\n<\/tr>\n<\/thead>\n
    Tr\u1ecdng t\u00e2m ph\u00e2n t\u00edch<\/strong><\/td>\nLu\u1ed3ng d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 ho\u1eb7c tr\u1ea1ng th\u00e1i th\u1ec3 hi\u1ec7n<\/td>\nC\u1ea5u tr\u00fac chung ho\u1eb7c \u0111\u1ecbnh ngh\u0129a ki\u1ec3u<\/td>\n<\/tr>\n
    Giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n<\/strong><\/td>\nKi\u1ec3m th\u1eed, g\u1ee1 l\u1ed7i ho\u1eb7c tri\u1ec3n khai<\/td>\nThu th\u1eadp y\u00eau c\u1ea7u ban \u0111\u1ea7u<\/td>\n<\/tr>\n
    \u0110\u1ed9 ph\u1ee9c t\u1ea1p<\/strong><\/td>\nC\u1ea7n c\u00e1c t\u01b0\u01a1ng t\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng ph\u1ee9c t\u1ea1p<\/td>\nC\u00e1c quy tr\u00ecnh tuy\u1ebfn t\u00ednh \u0111\u01a1n gi\u1ea3n<\/td>\n<\/tr>\n
    \u0110\u1ed1i t\u01b0\u1ee3ng giao ti\u1ebfp<\/strong><\/td>\nL\u1eadp tr\u00ecnh vi\u00ean ho\u1eb7c k\u1ef9 s\u01b0 ki\u1ec3m th\u1eed<\/td>\nC\u00e1c b\u00ean li\u00ean quan ho\u1eb7c kh\u00e1ch h\u00e0ng<\/td>\n<\/tr>\n
    T\u1ea7n su\u1ea5t thay \u0111\u1ed5i<\/strong><\/td>\nC\u1ea5u h\u00ecnh \u1ed5n \u0111\u1ecbnh t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m<\/td>\nTr\u1ea1ng th\u00e1i \u0111\u1ed9ng thay \u0111\u1ed5i nhanh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    N\u1ebfu ph\u1ea7n l\u1edbn c\u00e2u tr\u1ea3 l\u1eddi c\u1ee7a b\u1ea1n ph\u00f9 h\u1ee3p v\u1edbi c\u1ed9t \u201cC\u00f3\u201d, th\u00ec s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 kh\u1ea3 n\u0103ng l\u00e0 ph\u00f9 h\u1ee3p.<\/p>\n

    T\u00ecnh hu\u1ed1ng 1: G\u1ee1 l\u1ed7i c\u00e1c t\u01b0\u01a1ng t\u00e1c ph\u1ee9c t\u1ea1p \ud83d\udc1e<\/h3>\n

    Khi m\u1ed9t h\u1ec7 th\u1ed1ng th\u1ec3 hi\u1ec7n h\u00e0nh vi kh\u00f4ng mong mu\u1ed1n, s\u01a1 \u0111\u1ed3 l\u1edbp th\u01b0\u1eddng thi\u1ebfu \u0111\u1ed9 chi ti\u1ebft c\u1ea7n thi\u1ebft \u0111\u1ec3 truy v\u1ebft v\u1ea5n \u0111\u1ec1. B\u1ea1n c\u00f3 th\u1ec3 bi\u1ebft r\u1eb1ng Ng\u01b0\u1eddi d\u00f9ng<\/code> k\u1ebft n\u1ed1i v\u1edbi \u0110\u01a1n h\u00e0ng<\/code>, nh\u01b0ng b\u1ea1n c\u1ea7n bi\u1ebft li\u1ec7u user_99<\/code> hi\u1ec7n \u0111ang \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi order_500<\/code> v\u1edbi tr\u1ea1ng th\u00e1i l\u00e0 \u0111ang ch\u1edd<\/code>.<\/p>\n

    S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng gi\u00fap x\u00e1c \u0111\u1ecbnh tr\u1ea1ng th\u00e1i c\u1ee5 th\u1ec3 g\u00e2y ra s\u1ef1 c\u1ed1. N\u00f3 cho ph\u00e9p k\u1ef9 s\u01b0 tr\u1ef1c quan h\u00f3a:<\/p>\n

      \n
    • Nh\u1eefng th\u1ec3 hi\u1ec7n \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee5 th\u1ec3 n\u00e0o \u0111ang l\u01b0u tr\u1eef d\u1eef li\u1ec7u g\u00e2y v\u1ea5n \u0111\u1ec1.<\/li>\n
    • C\u00e1ch c\u00e1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c th\u1ec3 hi\u1ec7n n\u00e0y \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh.<\/li>\n
    • Li\u1ec7u c\u00e1c m\u1ed1i quan h\u1ec7 c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi logic mong \u0111\u1ee3i cho th\u1ec3 hi\u1ec7n c\u1ee5 th\u1ec3 \u0111\u00f3 hay kh\u00f4ng.<\/li>\n<\/ul>\n

      T\u00ecnh hu\u1ed1ng 2: X\u00e1c minh l\u01b0\u1ee3c \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u \ud83d\uddc3\ufe0f<\/h3>\n

      Trong c\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7, c\u00e1c b\u1ea3ng t\u01b0\u01a1ng \u1ee9ng v\u1edbi c\u00e1c l\u1edbp, v\u00e0 c\u00e1c h\u00e0ng t\u01b0\u01a1ng \u1ee9ng v\u1edbi c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 c\u1ea7u n\u1ed1i gi\u1eefa m\u00f4 h\u00ecnh logic v\u00e0 d\u1eef li\u1ec7u v\u1eadt l\u00fd.<\/p>\n

      S\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 n\u00e0y \u0111\u1ec3:<\/p>\n

        \n
      • X\u00e1c minh r\u1eb1ng c\u00e1c kh\u00f3a ngo\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp ch\u00ednh x\u00e1c gi\u1eefa c\u00e1c b\u1ea3n ghi c\u1ee5 th\u1ec3.<\/li>\n
      • T\u00e0i li\u1ec7u tr\u1ea1ng th\u00e1i mong \u0111\u1ee3i c\u1ee7a m\u1ed9t giao d\u1ecbch ph\u1ee9c t\u1ea1p tr\u01b0\u1edbc khi n\u00f3 \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn.<\/li>\n
      • \u0110\u1ea3m b\u1ea3o r\u1eb1ng c\u1ea5u tr\u00fac d\u1eef li\u1ec7u h\u1ed7 tr\u1ee3 c\u00e1c r\u00e0ng bu\u1ed9c b\u1ed9i s\u1ed1 y\u00eau c\u1ea7u.<\/li>\n<\/ul>\n

        B\u1ed1i c\u1ea3nh 3: T\u00e0i li\u1ec7u t\u1ea3i tr\u1ecdng API \ud83d\udce1<\/h3>\n

        Khi \u0111\u1ecbnh ngh\u0129a m\u1ed9t API, c\u00e1c ph\u1ea7n th\u00e2n y\u00eau c\u1ea7u v\u00e0 ph\u1ea3n h\u1ed3i v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng r\u1ea5t hi\u1ec7u qu\u1ea3 trong vi\u1ec7c th\u1ec3 hi\u1ec7n c\u1ea5u tr\u00fac c\u1ee7a t\u1ea3i tr\u1ecdng JSON t\u1ea1i m\u1ed9t \u0111i\u1ec3m cu\u1ed1i c\u1ee5 th\u1ec3.<\/p>\n

        N\u00f3 l\u00e0m r\u00f5:<\/p>\n

          \n
        • S\u1ef1 l\u1ed3ng gh\u00e9p ch\u00ednh x\u00e1c c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng b\u00ean trong m\u1ed9t ph\u1ea3n h\u1ed3i.<\/li>\n
        • C\u00e1c thu\u1ed9c t\u00ednh b\u1eaft bu\u1ed9c so v\u1edbi t\u00f9y ch\u1ecdn cho m\u1ed9t y\u00eau c\u1ea7u c\u1ee5 th\u1ec3.<\/li>\n
        • C\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n t\u1ea3i tr\u1ecdng.<\/li>\n<\/ul>\n

          B\u1ed1i c\u1ea3nh 4: Bi\u1ec3u di\u1ec5n tr\u01b0\u1eddng h\u1ee3p ki\u1ec3m th\u1eed \ud83e\uddea<\/h3>\n

          C\u00e1c nh\u00f3m QA th\u01b0\u1eddng c\u1ea7n hi\u1ec3u tr\u1ea1ng th\u00e1i c\u1ee7a h\u1ec7 th\u1ed1ng tr\u01b0\u1edbc khi ch\u1ea1y ki\u1ec3m th\u1eed. Thay v\u00ec m\u00f4 t\u1ea3 tr\u1ea1ng th\u00e1i b\u1eb1ng v\u0103n b\u1ea3n, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng cung c\u1ea5p bi\u1ec3u di\u1ec5n tr\u1ef1c quan c\u1ee7a c\u00e1c \u0111i\u1ec1u ki\u1ec7n ti\u00ean quy\u1ebft.<\/p>\n

          \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch cho:<\/p>\n

            \n
          • Ki\u1ec3m th\u1eed t\u00edch h\u1ee3p n\u01a1i nhi\u1ec1u h\u1ec7 th\u1ed1ng t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau.<\/li>\n
          • Ki\u1ec3m th\u1eed h\u1ed3i quy \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u1ed9t thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i c\u1ee5 th\u1ec3 kh\u00f4ng l\u00e0m \u0111\u1ee9t c\u00e1c li\u00ean k\u1ebft.<\/li>\n
          • Gi\u1ea3i th\u00edch c\u00e1c t\u00ecnh hu\u1ed1ng ki\u1ec3m th\u1eed ph\u1ee9c t\u1ea1p cho c\u00e1c th\u00e0nh vi\u00ean nh\u00f3m kh\u00f4ng chuy\u00ean k\u1ef9 thu\u1eadt.<\/li>\n<\/ul>\n

            S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng so v\u1edbi s\u01a1 \u0111\u1ed3 l\u1edbp: M\u1ed9t ph\u00e2n t\u00edch s\u00e2u \u2696\ufe0f<\/h2>\n

            S\u1ef1 nh\u1ea7m l\u1eabn th\u01b0\u1eddng x\u1ea3y ra gi\u1eefa s\u01a1 \u0111\u1ed3 l\u1edbp v\u00e0 s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng. C\u1ea3 hai \u0111\u1ec1u l\u00e0 s\u01a1 \u0111\u1ed3 c\u1ea5u tr\u00fac t\u0129nh, nh\u01b0ng ch\u00fang ph\u1ee5c v\u1ee5 nh\u1eefng m\u1ee5c \u0111\u00edch kh\u00e1c nhau. Hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u00fap tr\u00e1nh s\u1ef1 tr\u00f9ng l\u1eb7p v\u00e0 nh\u1ea7m l\u1eabn trong t\u00e0i li\u1ec7u c\u1ee7a b\u1ea1n.<\/p>\n

            Ph\u1ea1m vi v\u00e0 tr\u1eebu t\u01b0\u1ee3ng<\/h3>\n

            S\u01a1 \u0111\u1ed3 l\u1edbp ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng cao. N\u00f3 \u0111\u1ecbnh ngh\u0129a quy t\u1eafc c\u1ee7a tr\u00f2 ch\u01a1i. N\u00f3 n\u00f3i: \u201cM\u1ecdi Ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3<\/em>c\u00f3 m\u1ed9t \u0110\u01a1n h\u00e0ng.\u201d S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c \u0111\u1ed9 th\u1ef1c thi. N\u00f3 n\u00f3i: \u201cNg\u01b0\u1eddi d\u00f9ng c\u1ee5 th\u1ec3 n\u00e0y \u0111ang c\u00f3<\/em>\u0111ang c\u00f3 m\u1ed9t \u0110\u01a1n h\u00e0ng ngay l\u00fac n\u00e0y.\u201d<\/p>\n

            Th\u1eddi gian v\u00e0 tr\u1ea1ng th\u00e1i<\/h3>\n

            S\u01a1 \u0111\u1ed3 l\u1edbp l\u00e0 b\u1ea5t bi\u1ebfn theo th\u1eddi gian. Ch\u00fang m\u00f4 t\u1ea3 ti\u1ec1m n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng b\u1ecb gi\u1edbi h\u1ea1n theo th\u1eddi gian. Ch\u00fang m\u00f4 t\u1ea3 tr\u1ea1ng th\u00e1i c\u1ee7a h\u1ec7 th\u1ed1ng t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3. N\u1ebfu b\u1ea1n thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng (v\u00ed d\u1ee5: t\u1eeb \u0111ang ho\u1ea1t \u0111\u1ed9ng<\/code>sang kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng<\/code>), s\u01a1 \u0111\u1ed3 l\u1edbp v\u1eabn gi\u1eef nguy\u00ean, nh\u01b0ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng s\u1ebd thay \u0111\u1ed5i.<\/p>\n

            N\u1ed7 l\u1ef1c b\u1ea3o tr\u00ec<\/h3>\n

            S\u01a1 \u0111\u1ed3 l\u1edbp th\u01b0\u1eddng \u1ed5n \u0111\u1ecbnh. M\u1ed9t khi ki\u1ebfn tr\u00fac \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh, ch\u00fang hi\u1ebfm khi thay \u0111\u1ed5i. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng th\u00ec d\u1ec5 thay \u0111\u1ed5i. Ch\u00fang \u0111\u00f2i h\u1ecfi c\u1eadp nh\u1eadt li\u00ean t\u1ee5c \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c khi h\u1ec7 th\u1ed1ng ph\u00e1t tri\u1ec3n. Do \u0111\u00f3, ch\u00fang kh\u00f4ng n\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c b\u1ea3n t\u1ed5ng quan ki\u1ebfn tr\u00fac c\u1ea5p cao nh\u1eb1m m\u1ee5c \u0111\u00edch tham kh\u1ea3o l\u00e2u d\u00e0i.<\/p>\n

            \u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf trong ph\u00e1t tri\u1ec3n \ud83d\udee0\ufe0f<\/h2>\n

            V\u01b0\u1ee3t ra ngo\u00e0i danh s\u00e1ch ki\u1ec3m tra, c\u00f3 nh\u1eefng quy tr\u00ecnh c\u1ee5 th\u1ec3 m\u00e0 s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng t\u1ecfa s\u00e1ng. Vi\u1ec7c t\u00edch h\u1ee3p ch\u00fang v\u00e0o quy tr\u00ecnh c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n giao ti\u1ebfp v\u00e0 gi\u1ea3m thi\u1ec3u l\u1ed7i.<\/p>\n

            1. \u0110\u01b0a ng\u01b0\u1eddi ph\u00e1t tri\u1ec3n m\u1edbi v\u00e0o h\u1ec7 th\u1ed1ng<\/h3>\n

            Khi m\u1ed9t k\u1ef9 s\u01b0 m\u1edbi tham gia m\u1ed9t d\u1ef1 \u00e1n ph\u1ee9c t\u1ea1p, s\u01a1 \u0111\u1ed3 l\u1edbp cung c\u1ea5p t\u1eeb v\u1ef1ng, nh\u01b0ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng cung c\u1ea5p b\u1ed1i c\u1ea3nh. Vi\u1ec7c hi\u1ec3n th\u1ecb m\u1ed9t s\u01a1 \u0111\u1ed3 v\u1ec1 lu\u1ed3ng giao d\u1ecbch c\u1ee5 th\u1ec3 gi\u00fap h\u1ecd hi\u1ec3u c\u00e1ch c\u00e1c th\u00e0nh ph\u1ea7n t\u01b0\u01a1ng t\u00e1c trong th\u1ef1c t\u1ebf. \u0110i\u1ec1u n\u00e0y l\u00e0m gi\u1ea3m t\u1ea3i nh\u1eadn th\u1ee9c khi chuy\u1ec3n \u0111\u1ed5i c\u00e1c ki\u1ec3u tr\u1eebu t\u01b0\u1ee3ng th\u00e0nh c\u00e1ch s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3.<\/p>\n

            2. C\u00e1c bu\u1ed5i h\u1ecdp xem x\u00e9t thi\u1ebft k\u1ebf<\/h3>\n

            Trong c\u00e1c bu\u1ed5i xem x\u00e9t m\u00e3 ngu\u1ed3n ho\u1eb7c h\u1ecdp thi\u1ebft k\u1ebf ki\u1ebfn tr\u00fac, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 l\u00e0m n\u1ed5i b\u1eadt c\u00e1c v\u1ea5n \u0111\u1ec1 ti\u1ec1m \u1ea9n v\u1ec1 t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u. V\u00ed d\u1ee5, b\u1ea1n c\u00f3 th\u1ec3 h\u00ecnh dung m\u1ed9t t\u00ecnh hu\u1ed1ng m\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng Kh\u00e1ch<\/code> c\u1ed1 g\u1eafng truy c\u1eadp m\u1ed9t t\u1eadp tin b\u1ea3o m\u1eadt<\/code> \u0111\u1ed1i t\u01b0\u1ee3ng. S\u01a1 \u0111\u1ed3 c\u00f3 th\u1ec3 cho th\u1ea5y kh\u00f4ng c\u00f3 li\u00ean k\u1ebft n\u00e0o gi\u1eefa ch\u00fang, ngay l\u1eadp t\u1ee9c ph\u00e1t hi\u1ec7n l\u1ed7i logic.<\/p>\n

            3. Di chuy\u1ec3n h\u1ec7 th\u1ed1ng c\u0169<\/h3>\n

            Khi di chuy\u1ec3n d\u1eef li\u1ec7u t\u1eeb h\u1ec7 th\u1ed1ng n\u00e0y sang h\u1ec7 th\u1ed1ng kh\u00e1c, c\u1ea5u tr\u00fac d\u1eef li\u1ec7u l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng gi\u00fap \u00e1nh x\u1ea1 c\u00e1c th\u1ec3 hi\u1ec7n d\u1eef li\u1ec7u ngu\u1ed3n sang l\u01b0\u1ee3c \u0111\u1ed3 \u0111\u00edch. Ch\u00fang cho ph\u00e9p c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 h\u00ecnh dung qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i c\u1ee7a c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u c\u1ee5 th\u1ec3, \u0111\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 th\u00f4ng tin n\u00e0o b\u1ecb m\u1ea5t trong qu\u00e1 tr\u00ecnh di chuy\u1ec3n.<\/p>\n

            Khi n\u00e0o n\u00ean tr\u00e1nh s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \ud83d\udeab<\/h2>\n

            S\u1ef1 chuy\u00ean m\u00f4n trong ng\u00e0nh k\u1ef9 thu\u1eadt c\u0169ng \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c bi\u1ebft \u0111\u01b0\u1ee3c \u0111i\u1ec1u g\u00ec kh\u00f4ng<\/em> c\u1ea7n l\u00e0m. C\u00f3 nh\u1eefng t\u00ecnh hu\u1ed1ng m\u00e0 s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng ch\u1ec9 g\u00e2y nhi\u1ec5u thay v\u00ec l\u00e0m r\u00f5 th\u00f4ng tin.<\/p>\n

              \n
            • H\u1ec7 th\u1ed1ng r\u1ea5t \u0111\u1ed9ng:<\/strong> N\u1ebfu tr\u1ea1ng th\u00e1i h\u1ec7 th\u1ed1ng thay \u0111\u1ed5i m\u1ed7i mili gi\u00e2y, m\u1ed9t s\u01a1 \u0111\u1ed3 t\u0129nh s\u1ebd tr\u1edf n\u00ean l\u1ed7i th\u1eddi ngay l\u1eadp t\u1ee9c. Thay v\u00e0o \u0111\u00f3, h\u00e3y s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 ho\u1eb7c s\u01a1 \u0111\u1ed3 m\u00e1y tr\u1ea1ng th\u00e1i.<\/li>\n
            • Giai \u0111o\u1ea1n kh\u00e1i ni\u1ec7m ban \u0111\u1ea7u:<\/strong> Khi th\u1ea3o lu\u1eadn \u00fd t\u01b0\u1edfng, b\u1ea1n \u0111ang kh\u00e1m ph\u00e1 c\u00e1c ki\u1ec3u v\u00e0 m\u1ed1i quan h\u1ec7, ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u00e1c th\u1ec3 hi\u1ec7n. B\u1eaft \u0111\u1ea7u b\u1eb1ng s\u01a1 \u0111\u1ed3 l\u1edbp ho\u1eb7c m\u00f4 h\u00ecnh mi\u1ec1n.<\/li>\n
            • C\u00e1c quan \u0111i\u1ec3m doanh nghi\u1ec7p quy m\u00f4 l\u1edbn:<\/strong> M\u1ed9t h\u1ec7 th\u1ed1ng doanh nghi\u1ec7p c\u00f3 th\u1ec3 c\u00f3 h\u00e0ng tri\u1ec7u \u0111\u1ed1i t\u01b0\u1ee3ng. Vi\u1ec7c t\u00e0i li\u1ec7u h\u00f3a t\u1ea5t c\u1ea3 ch\u00fang l\u00e0 kh\u00f4ng th\u1ec3. H\u00e3y duy tr\u00ec s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 l\u1edbp cho c\u00e1i nh\u00ecn c\u1ea5p cao.<\/li>\n
            • T\u00e0i li\u1ec7u \u0111\u1ed9 ph\u00e2n gi\u1ea3i th\u1ea5p:<\/strong> N\u1ebfu \u0111\u1ed9i c\u1ee7a b\u1ea1n kh\u00f4ng c\u00f3 quy tr\u00ecnh duy tr\u00ec s\u01a1 \u0111\u1ed3, vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng s\u1ebd d\u1eabn \u0111\u1ebfn t\u00e0i li\u1ec7u l\u1ed7i th\u1eddi nhanh h\u01a1n b\u1ea5t k\u1ef3 lo\u1ea1i n\u00e0o kh\u00e1c.<\/li>\n<\/ul>\n

              C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t khi t\u1ea1o d\u1ef1ng \u270d\ufe0f<\/h2>\n

              N\u1ebfu b\u1ea1n quy\u1ebft \u0111\u1ecbnh ti\u1ebfp t\u1ee5c, h\u00e3y tu\u00e2n theo c\u00e1c h\u01b0\u1edbng d\u1eabn n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 v\u1eabn h\u1eefu \u00edch.<\/p>\n

              1. H\u1ea1n ch\u1ebf ph\u1ea1m vi<\/h3>\n

              \u0110\u1eebng c\u1ed1 g\u1eafng v\u1ebd s\u01a1 \u0111\u1ed3 to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng. H\u00e3y t\u1eadp trung v\u00e0o m\u1ed9t tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng duy nh\u1ea5t ho\u1eb7c m\u1ed9t giao d\u1ecbch c\u1ee5 th\u1ec3. M\u1ed9t s\u01a1 \u0111\u1ed3 hi\u1ec3n th\u1ecb 50 \u0111\u1ed1i t\u01b0\u1ee3ng s\u1ebd kh\u00f3 \u0111\u1ecdc h\u01a1n so v\u1edbi s\u01a1 \u0111\u1ed3 ch\u1ec9 hi\u1ec3n th\u1ecb 5 \u0111\u1ed1i t\u01b0\u1ee3ng v\u1edbi chi ti\u1ebft s\u00e2u.<\/p>\n

              2. S\u1eed d\u1ee5ng t\u00ean g\u1ecdi nh\u1ea5t qu\u00e1n<\/h3>\n

              \u0110\u1ea3m b\u1ea3o t\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng tu\u00e2n theo m\u1ed9t quy \u01b0\u1edbc r\u00f5 r\u00e0ng. S\u1eed d\u1ee5ng c\u00e1c ti\u1ec1n t\u1ed1 nh\u01b0obj_<\/code> ho\u1eb7c inst_<\/code> c\u00f3 th\u1ec3 gi\u00fap ph\u00e2n bi\u1ec7t ch\u00fang v\u1edbi t\u00ean l\u1edbp trong ch\u00fa th\u00edch. T\u00ednh nh\u1ea5t qu\u00e1n gi\u00fap tr\u00e1nh nh\u1ea7m l\u1eabn gi\u1eefa b\u1ea3n v\u1ebd s\u01a1 b\u1ed9 v\u00e0 b\u1ea3n th\u1ec3 hi\u1ec7n c\u1ee5 th\u1ec3.<\/p>\n

              3. Ghi ch\u00fa c\u00e1c gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh<\/h3>\n

              \u0110\u1eebng ch\u1ec9 hi\u1ec3n th\u1ecb c\u1ea5u tr\u00fac. H\u00e3y hi\u1ec3n th\u1ecb d\u1eef li\u1ec7u. N\u1ebfu m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ea1i di\u1ec7n cho m\u1ed9t kho\u1ea3n thanh to\u00e1n, vi\u1ec7c hi\u1ec3n th\u1ecb lo\u1ea1i ti\u1ec1n t\u1ec7 v\u00e0 s\u1ed1 ti\u1ec1n s\u1ebd mang l\u1ea1i gi\u00e1 tr\u1ecb l\u1edbn cho s\u01a1 \u0111\u1ed3. \u0110i\u1ec1u n\u00e0y bi\u1ebfn m\u1ed9t b\u1ea3n \u0111\u1ed3 c\u1ea5u tr\u00fac th\u00e0nh b\u1ea3n \u0111\u1ed3 d\u1eef li\u1ec7u.<\/p>\n

              4. Li\u00ean k\u1ebft v\u1edbi m\u00e3 ngu\u1ed3n<\/h3>\n

              N\u1ebfu c\u00f3 th\u1ec3, h\u00e3y li\u00ean k\u1ebft s\u01a1 \u0111\u1ed3 v\u1edbi m\u00e3 ngu\u1ed3n ho\u1eb7c c\u00e1c tr\u01b0\u1eddng h\u1ee3p ki\u1ec3m th\u1eed li\u00ean quan. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t t\u00e0i li\u1ec7u t\u00e1ch bi\u1ec7t m\u00e0 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a t\u00e0i li\u1ec7u s\u1ed1ng \u0111\u1ed9ng. N\u1ebfu m\u00e3 ngu\u1ed3n thay \u0111\u1ed5i, s\u01a1 \u0111\u1ed3 c\u1ea7n \u0111\u01b0\u1ee3c xem x\u00e9t l\u1ea1i.<\/p>\n

              5. Gi\u1eef cho n\u00f3 d\u1ec5 \u0111\u1ecdc<\/h3>\n

              S\u1eed d\u1ee5ng nh\u00f3m \u0111\u1ec3 s\u1eafp x\u1ebfp c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng. N\u1ebfu b\u1ea1n c\u00f3 nhi\u1ec1u th\u1ec3 hi\u1ec7n c\u1ee7a c\u00f9ng m\u1ed9t l\u1edbp, h\u00e3y nh\u00f3m ch\u00fang l\u1ea1i v\u1ec1 m\u1eb7t th\u1ecb gi\u00e1c. \u0110i\u1ec1u n\u00e0y ng\u0103n s\u01a1 \u0111\u1ed3 tr\u1edf th\u00e0nh m\u1ed9t m\u1ea1ng l\u01b0\u1edbi r\u1ed1i ren c\u00e1c \u0111\u01b0\u1eddng n\u1ed1i. Kho\u1ea3ng tr\u1ed1ng tr\u1eafng l\u00e0 ng\u01b0\u1eddi b\u1ea1n c\u1ee7a b\u1ea1n.<\/p>\n

              T\u00edch h\u1ee3p v\u1edbi c\u00e1c lo\u1ea1i s\u01a1 \u0111\u1ed3 kh\u00e1c \ud83e\uddf1<\/h2>\n

              S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng t\u1ed3n t\u1ea1i m\u1ed9t c\u00e1ch t\u00e1ch bi\u1ec7t. N\u00f3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t nh\u01b0 m\u1ed9t ph\u1ea7n trong b\u1ed9 s\u01a1 \u0111\u1ed3.<\/p>\n

              K\u1ebft h\u1ee3p v\u1edbi S\u01a1 \u0111\u1ed3 L\u1edbp<\/h3>\n

              S\u01a1 \u0111\u1ed3 L\u1edbp l\u00e0 cha. S\u01a1 \u0111\u1ed3 \u0110\u1ed1i t\u01b0\u1ee3ng l\u00e0 con. Lu\u00f4n tham chi\u1ebfu \u0111\u1ebfn S\u01a1 \u0111\u1ed3 L\u1edbp khi t\u1ea1o S\u01a1 \u0111\u1ed3 \u0110\u1ed1i t\u01b0\u1ee3ng. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o c\u00e1c ki\u1ec3u d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong b\u1ea3n ch\u1ee5p th\u1ef1c s\u1ef1 t\u1ed3n t\u1ea1i trong thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng.<\/p>\n

              K\u1ebft h\u1ee3p v\u1edbi S\u01a1 \u0111\u1ed3 Th\u1ee9 t\u1ef1<\/h3>\n

              S\u01a1 \u0111\u1ed3 Th\u1ee9 t\u1ef1 th\u1ec3 hi\u1ec7n lu\u1ed3ng tin nh\u1eafn theo th\u1eddi gian. S\u01a1 \u0111\u1ed3 \u0110\u1ed1i t\u01b0\u1ee3ng th\u1ec3 hi\u1ec7n tr\u1ea1ng th\u00e1i c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng nh\u1eadn nh\u1eefng tin nh\u1eafn \u0111\u00f3. S\u1eed d\u1ee5ng ch\u00fang c\u00f9ng nhau s\u1ebd cung c\u1ea5p b\u1ee9c tranh to\u00e0n di\u1ec7n: quy tr\u00ecnh (Th\u1ee9 t\u1ef1) v\u00e0 tr\u1ea1ng th\u00e1i (\u0110\u1ed1i t\u01b0\u1ee3ng).<\/p>\n

              K\u1ebft h\u1ee3p v\u1edbi S\u01a1 \u0111\u1ed3 M\u00e1y tr\u1ea1ng th\u00e1i<\/h3>\n

              S\u01a1 \u0111\u1ed3 M\u00e1y tr\u1ea1ng th\u00e1i th\u1ec3 hi\u1ec7n c\u00e1ch m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i. S\u01a1 \u0111\u1ed3 \u0110\u1ed1i t\u01b0\u1ee3ng th\u1ec3 hi\u1ec7n tr\u1ea1ng th\u00e1i c\u1ee5 th\u1ec3 t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m. C\u00f9ng nhau, ch\u00fang gi\u00fap kh\u1eafc ph\u1ee5c c\u00e1c v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i.<\/p>\n

              Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ea7n l\u01b0u \u00fd \u26a0\ufe0f<\/h2>\n

              Ngay c\u1ea3 nh\u1eefng k\u1ef9 s\u01b0 c\u00f3 kinh nghi\u1ec7m c\u0169ng c\u00f3 th\u1ec3 m\u1eafc b\u1eaby khi t\u1ea1o c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y.<\/p>\n

              Sai l\u1ea7m 1: Qu\u00e1 kh\u00e1i qu\u00e1t h\u00f3a<\/h3>\n

              S\u1eed d\u1ee5ng t\u00ean chung chung nh\u01b0Object1<\/code> ho\u1eb7c Entity2<\/code> s\u1ebd l\u00e0m m\u1ea5t m\u1ee5c \u0111\u00edch. C\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y nh\u1eb1m gi\u00fap hi\u1ec3u d\u1eef li\u1ec7u c\u1ee5 th\u1ec3. H\u00e3y \u0111\u1eb7t t\u00ean c\u00f3 \u00fd ngh\u0129a cho c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng, ph\u1ea3n \u00e1nh vai tr\u00f2 c\u1ee7a ch\u00fang trong h\u1ec7 th\u1ed1ng.<\/p>\n

              Sai l\u1ea7m 2: B\u1ecf qua c\u00e1c gi\u00e1 tr\u1ecb null<\/h3>\n

              C\u00e1c li\u00ean k\u1ebft c\u00f3 th\u1ec3 l\u00e0 null. N\u1ebfu m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng c\u00f3 li\u00ean k\u1ebft v\u1edbi \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c, n\u00f3 c\u1ea7n \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb r\u00f5 r\u00e0ng nh\u01b0 v\u1eady. Che gi\u1ea5u c\u00e1c li\u00ean k\u1ebft null c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nh\u1eefng gi\u1ea3 \u0111\u1ecbnh v\u1ec1 m\u1ed1i quan h\u1ec7 b\u1eaft bu\u1ed9c m\u00e0 th\u1ef1c t\u1ebf kh\u00f4ng t\u1ed3n t\u1ea1i trong m\u00e3 ngu\u1ed3n.<\/p>\n

              Sai l\u1ea7m 3: Gi\u1ea3 \u0111\u1ecbnh t\u0129nh<\/h3>\n

              \u0110\u1eebng gi\u1ea3 \u0111\u1ecbnh s\u01a1 \u0111\u1ed3 bi\u1ec3u di\u1ec5n m\u1ed9t tr\u1ea1ng th\u00e1i v\u0129nh vi\u1ec5n. Lu\u00f4n ghi ch\u00fa ng\u1eef c\u1ea3nh cho s\u01a1 \u0111\u1ed3 (v\u00ed d\u1ee5: \u201cTr\u1ea1ng th\u00e1i Sau Khi L\u1ea5y H\u00e0ng\u201d). \u0110i\u1ec1u n\u00e0y nh\u1eafc nh\u1edf ng\u01b0\u1eddi \u0111\u1ecdc r\u1eb1ng s\u01a1 \u0111\u1ed3 ch\u1ec9 l\u00e0 m\u1ed9t b\u1ee9c \u1ea3nh ch\u1ee5p, ch\u1ee9 kh\u00f4ng ph\u1ea3i s\u1ef1 th\u1eadt v\u0129nh vi\u1ec5n.<\/p>\n

              B\u1ea3o tr\u00ec v\u00f2ng \u0111\u1eddi s\u01a1 \u0111\u1ed3 \ud83d\udd04<\/h2>\n

              T\u00e0i li\u1ec7u ch\u1ec9 c\u00f3 gi\u00e1 tr\u1ecb khi ch\u00ednh x\u00e1c. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1eb7c bi\u1ec7t d\u1ec5 tr\u1edf n\u00ean l\u1ed7i th\u1eddi. \u0110\u1ec3 duy tr\u00ec ch\u00fang:<\/p>\n

                \n
              • C\u1eadp nh\u1eadt khi thay \u0111\u1ed5i:<\/strong> N\u1ebfu logic cho m\u1ed9t giao d\u1ecbch c\u1ee5 th\u1ec3 thay \u0111\u1ed5i, h\u00e3y c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3.<\/li>\n
              • Xem x\u00e9t trong L\u1eadp k\u1ebf ho\u1ea1ch Sprint:<\/strong> Bao g\u1ed3m vi\u1ec7c xem x\u00e9t s\u01a1 \u0111\u1ed3 trong c\u00e1c bu\u1ed5i l\u1ec5 sprint n\u1ebfu sprint \u0111\u00f3 li\u00ean quan \u0111\u1ebfn nh\u1eefng thay \u0111\u1ed5i d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p.<\/li>\n
              • T\u1ef1 \u0111\u1ed9ng h\u00f3a \u1edf nh\u1eefng n\u01a1i c\u00f3 th\u1ec3:<\/strong> M\u1ed9t s\u1ed1 c\u00f4ng c\u1ee5 m\u00f4 h\u00ecnh h\u00f3a c\u00f3 th\u1ec3 t\u1ea1o s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng t\u1eeb c\u00e1c \u1ee9ng d\u1ee5ng \u0111ang ch\u1ea1y ho\u1eb7c c\u01a1 s\u1edf d\u1eef li\u1ec7u ki\u1ec3m th\u1eed. H\u00e3y s\u1eed d\u1ee5ng c\u00e1c t\u00ednh n\u0103ng n\u00e0y \u0111\u1ec3 gi\u1ea3m thi\u1ec3u c\u00f4ng vi\u1ec7c b\u1ea3o tr\u00ec th\u1ee7 c\u00f4ng.<\/li>\n
              • L\u01b0u tr\u1eef c\u00e1c phi\u00ean b\u1ea3n c\u0169:<\/strong> N\u1ebfu m\u1ed9t s\u01a1 \u0111\u1ed3 bi\u1ec3u di\u1ec5n tr\u1ea1ng th\u00e1i c\u0169, h\u00e3y l\u01b0u tr\u1eef n\u00f3 thay v\u00ec x\u00f3a \u0111i. N\u00f3 c\u00f3 th\u1ec3 c\u1ea7n thi\u1ebft cho ki\u1ec3m to\u00e1n ho\u1eb7c ph\u00e2n t\u00edch l\u1ecbch s\u1eed.<\/li>\n<\/ul>\n

                Suy ngh\u0129 cu\u1ed1i c\u00f9ng v\u1ec1 tri\u1ec3n khai \ud83d\udca1<\/h2>\n

                Vi\u1ec7c quy\u1ebft \u0111\u1ecbnh s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng UML kh\u00f4ng bao gi\u1edd n\u00ean l\u00e0 t\u1ef1 \u0111\u1ed9ng. \u0110\u00e2y l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 d\u00e0nh cho nh\u1eefng v\u1ea5n \u0111\u1ec1 c\u1ee5 th\u1ec3. Khi v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn vi\u1ec7c hi\u1ec3u tr\u1ea1ng th\u00e1i c\u1ee5 th\u1ec3 c\u1ee7a c\u00e1c th\u1ec3 hi\u1ec7n, c\u00e1c m\u1ed1i li\u00ean k\u1ebft gi\u1eefa ch\u00fang v\u00e0 d\u1eef li\u1ec7u ch\u00fang l\u01b0u tr\u1eef, th\u00ec lo\u1ea1i s\u01a1 \u0111\u1ed3 n\u00e0y l\u00e0 v\u00f4 song.<\/p>\n

                B\u1eb1ng c\u00e1ch tu\u00e2n theo danh s\u00e1ch ki\u1ec3m tra quy\u1ebft \u0111\u1ecbnh v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t, b\u1ea1n c\u00f3 th\u1ec3 t\u1eadn d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ec3 gi\u1ea3m thi\u1ec3u s\u1ef1 m\u01a1 h\u1ed3, c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c ki\u1ec3m th\u1eed v\u00e0 truy\u1ec1n \u0111\u1ea1t c\u1ea5u tr\u00fac d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. H\u00e3y nh\u1edb, m\u1ee5c ti\u00eau l\u00e0 s\u1ef1 r\u00f5 r\u00e0ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i s\u1ef1 \u0111\u1ea7y \u0111\u1ee7. M\u1ed9t s\u01a1 \u0111\u1ed3 t\u1eadp trung gi\u1ea3i th\u00edch t\u1ed1t m\u1ed9t t\u00ecnh hu\u1ed1ng s\u1ebd c\u00f3 gi\u00e1 tr\u1ecb h\u01a1n nhi\u1ec1u so v\u1edbi m\u1ed9t s\u01a1 \u0111\u1ed3 kh\u1ed5ng l\u1ed3 c\u1ed1 g\u1eafng gi\u1ea3i th\u00edch m\u1ecdi th\u1ee9.<\/p>\n

                Gi\u1eef t\u00e0i li\u1ec7u c\u1ee7a b\u1ea1n \u0111\u1ed3ng b\u1ed9 v\u1edbi th\u1ef1c t\u1ebf c\u1ee7a m\u00e3 ngu\u1ed3n. S\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ec3 l\u1ea5p \u0111\u1ea7y kho\u1ea3ng c\u00e1ch gi\u1eefa thi\u1ebft k\u1ebf l\u00fd thuy\u1ebft v\u00e0 th\u1ef1c thi th\u1ef1c t\u1ebf. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y \u0111\u1ea3m b\u1ea3o ki\u1ebfn tr\u00fac c\u1ee7a b\u1ea1n lu\u00f4n v\u1eefng ch\u1eafc, d\u1ec5 hi\u1ec3u v\u00e0 d\u1ec5 b\u1ea3o tr\u00ec trong su\u1ed1t v\u00f2ng \u0111\u1eddi ph\u1ea7n m\u1ec1m.<\/p>\n","protected":false},"excerpt":{"rendered":"

                Ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o tr\u1eebu t\u01b0\u1ee3ng tr\u1ef1c quan. Trong khi nhi\u1ec1u nh\u00f3m m\u1eb7c \u0111\u1ecbnh s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 l\u1edbp \u0111\u1ec3 th\u1ec3 hi\u1ec7n c\u1ea5u tr\u00fac, th\u00ec c\u00f3 m\u1ed9t t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3 m\u00e0 m\u1ed9t c\u00e1ch nh\u00ecn kh\u00e1c l\u1ea1i tr\u1edf n\u00ean quan tr\u1ecdng. S\u01a1 \u0111\u1ed3 S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng UML \u0111\u00f3ng vai […]<\/p>\n","protected":false},"author":1,"featured_media":1545,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[13],"tags":[44,45],"class_list":["post-1544","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language","tag-academic","tag-object-diagram"],"yoast_head":"\nKhi n\u00e0o n\u00ean s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng UML: Danh s\u00e1ch ki\u1ec3m tra quy\u1ebft \u0111\u1ecbnh \ud83d\udee0\ufe0f<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1ch s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng UML m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. 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