{"id":952,"date":"2026-04-14T07:30:09","date_gmt":"2026-04-14T07:30:09","guid":{"rendered":"https:\/\/www.visualize-ai.com\/vi\/communication-diagram-mistakes-backend-teams\/"},"modified":"2026-04-14T07:30:09","modified_gmt":"2026-04-14T07:30:09","slug":"communication-diagram-mistakes-backend-teams","status":"publish","type":"post","link":"https:\/\/www.visualize-ai.com\/vi\/communication-diagram-mistakes-backend-teams\/","title":{"rendered":"Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong s\u01a1 \u0111\u1ed3 giao ti\u1ebfp khi\u1ebfn \u0111\u1ed9i ng\u0169 backend b\u1ed1i r\u1ed1i"},"content":{"rendered":"

Thi\u1ebft k\u1ebf ki\u1ebfn tr\u00fac h\u1ec7 th\u1ed1ng \u0111\u00f2i h\u1ecfi nhi\u1ec1u h\u01a1n ch\u1ec9 vi\u1ec7c v\u1ebd c\u00e1c h\u00ecnh h\u1ed9p v\u00e0 m\u0169i t\u00ean. N\u00f3 \u0111\u00f2i h\u1ecfi s\u1ef1 ch\u00ednh x\u00e1c, r\u00f5 r\u00e0ng v\u00e0 hi\u1ec3u bi\u1ebft v\u1ec1 c\u00e1ch d\u1eef li\u1ec7u di chuy\u1ec3n gi\u1eefa c\u00e1c d\u1ecbch v\u1ee5. S\u01a1 \u0111\u1ed3 giao ti\u1ebfp, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ea3n \u0111\u1ed3 h\u00f3a c\u00e1c t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c th\u00e0nh ph\u1ea7n, \u0111\u00f3ng vai tr\u00f2 nh\u01b0 b\u1ea3n v\u1ebd thi\u1ebft k\u1ebf cho c\u00e1c k\u1ef9 s\u01b0 backend. Khi nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y ch\u1ee9a l\u1ed7i ho\u1eb7c thi\u1ebfu r\u00f5 r\u00e0ng, hi\u1ec7u \u1ee9ng lan truy\u1ec1n c\u00f3 th\u1ec3 l\u00e0m gi\u00e1n \u0111o\u1ea1n chu k\u1ef3 ph\u00e1t tri\u1ec3n, g\u00e2y ra n\u1ee3 k\u1ef9 thu\u1eadt v\u00e0 t\u1ea1o ra s\u1ef1 nh\u1ea7m l\u1eabn trong giai \u0111o\u1ea1n tri\u1ec3n khai. \ud83d\ude1f<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn th\u01b0\u1eddng g\u1eb7p trong s\u01a1 \u0111\u1ed3 giao ti\u1ebfp. B\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y, c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 v\u00e0 nh\u00e0 thi\u1ebft k\u1ebf c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00e0i li\u1ec7u c\u1ee7a h\u1ecd \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng th\u00e0nh m\u00e3 ngu\u1ed3n m\u1ea1nh m\u1ebd. Ch\u00fang ta s\u1ebd xem x\u00e9t c\u00e1c l\u1ed7i c\u1ee5 th\u1ec3, h\u1ec7 qu\u1ea3 c\u1ee7a ch\u00fang v\u00e0 c\u00e1ch tr\u00e1nh ch\u00fang m\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o c\u00f4ng c\u1ee5 hay n\u1ec1n t\u1ea3ng c\u1ee5 th\u1ec3 n\u00e0o. \ud83d\udca1<\/p>\n

\n
\"Charcoal<\/figure>\n<\/div>\n

T\u1ea1i sao s\u01a1 \u0111\u1ed3 giao ti\u1ebfp l\u1ea1i quan tr\u1ecdng \u0111\u1ed1i v\u1edbi k\u1ef9 thu\u1eadt backend \ud83d\udee0\ufe0f<\/h2>\n

C\u00e1c \u0111\u1ed9i ng\u0169 backend ph\u1ee5 thu\u1ed9c v\u00e0o t\u00e0i li\u1ec7u tr\u1ef1c quan \u0111\u1ec3 hi\u1ec3u chu k\u1ef3 s\u1ed1ng c\u1ee7a m\u1ed9t y\u00eau c\u1ea7u. Kh\u00e1c v\u1edbi s\u01a1 \u0111\u1ed3 l\u1edbp th\u1ec3 hi\u1ec7n c\u1ea5u tr\u00fac t\u0129nh, s\u01a1 \u0111\u1ed3 giao ti\u1ebfp m\u00f4 t\u1ea3 h\u00e0nh vi \u0111\u1ed9ng. N\u00f3 cho th\u1ea5y c\u00e1ch m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng g\u1eedi tin nh\u1eafn \u0111\u1ebfn \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c v\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00f3 ph\u1ea3n h\u1ed3i nh\u01b0 th\u1ebf n\u00e0o. Lu\u1ed3ng n\u00e0y r\u1ea5t quan tr\u1ecdng khi tri\u1ec3n khai API, x\u1eed l\u00fd c\u00e1c c\u00f4ng vi\u1ec7c b\u1ea5t \u0111\u1ed3ng b\u1ed9 v\u00e0 qu\u1ea3n l\u00fd tr\u1ea1ng th\u00e1i. Khi s\u01a1 \u0111\u1ed3 kh\u00f4ng r\u00f5 r\u00e0ng, m\u00e3 ngu\u1ed3n \u0111\u01b0\u1ee3c vi\u1ebft \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi n\u00f3 th\u01b0\u1eddng l\u1ec7ch kh\u1ecfi logic mong mu\u1ed1n. \ud83d\udcc9<\/p>\n

M\u1ed9t s\u01a1 \u0111\u1ed3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng t\u1ed1t \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t h\u1ee3p \u0111\u1ed3ng gi\u1eefa giai \u0111o\u1ea1n thi\u1ebft k\u1ebf v\u00e0 giai \u0111o\u1ea1n l\u1eadp tr\u00ecnh. N\u00f3 gi\u1ea3m t\u1ea3i nh\u1eadn th\u1ee9c cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n b\u1eb1ng c\u00e1ch tr\u1ef1c quan h\u00f3a c\u00e1c ph\u1ee5 thu\u1ed9c. Tuy nhi\u00ean, khi nh\u1eefng sai l\u1ea7m xu\u1ea5t hi\u1ec7n, h\u1ee3p \u0111\u1ed3ng n\u00e0y b\u1ecb ph\u00e1 v\u1ee1. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn:<\/p>\n

    \n
  • D\u1eef li\u1ec7u t\u1ea3i b\u1ecb hi\u1ec3u nh\u1ea7m \ud83d\udce6<\/li>\n
  • Logic x\u1eed l\u00fd l\u1ed7i sai \u26a0\ufe0f<\/li>\n
  • V\u1ea5n \u0111\u1ec1 \u0111\u1ed9 tr\u1ec5 kh\u00f4ng mong mu\u1ed1n \u23f1\ufe0f<\/li>\n
  • Kh\u00f3 kh\u0103n trong b\u1ea3o tr\u00ec v\u00e0 g\u1ee1 l\u1ed7i \ud83d\udd0d<\/li>\n<\/ul>\n

    Sai l\u1ea7m 1: H\u01b0\u1edbng lu\u1ed3ng tin nh\u1eafn kh\u00f4ng r\u00f5 r\u00e0ng \ud83d\udd04<\/h2>\n

    M\u1ed9t trong nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn nh\u1ea5t li\u00ean quan \u0111\u1ebfn h\u01b0\u1edbng c\u1ee7a lu\u1ed3ng tin nh\u1eafn. Trong s\u01a1 \u0111\u1ed3 giao ti\u1ebfp, c\u00e1c m\u0169i t\u00ean th\u1ec3 hi\u1ec7n lu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c d\u1eef li\u1ec7u. N\u1ebfu m\u1ed9t m\u0169i t\u00ean ch\u1ec9 t\u1eeb \u0110\u1ed1i t\u01b0\u1ee3ng A sang \u0110\u1ed1i t\u01b0\u1ee3ng B, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 A \u0111ang g\u1ecdi B. N\u1ebfu m\u0169i t\u00ean l\u00e0 hai chi\u1ec1u, n\u00f3 ng\u1ee5 \u00fd m\u1ed9t cu\u1ed9c trao \u0111\u1ed5i hai chi\u1ec1u ho\u1eb7c gi\u00e1 tr\u1ecb tr\u1ea3 v\u1ec1. S\u1ef1 nh\u1ea7m l\u1eabn th\u01b0\u1eddng x\u1ea3y ra khi c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf tr\u1ed9n l\u1eabn c\u00e1c cu\u1ed9c g\u1ecdi \u0111\u1ed3ng b\u1ed9 v\u1edbi c\u00e1c s\u1ef1 ki\u1ec7n b\u1ea5t \u0111\u1ed3ng b\u1ed9 m\u00e0 kh\u00f4ng c\u00f3 k\u00fd hi\u1ec7u r\u00f5 r\u00e0ng. \ud83e\udd14<\/p>\n

    C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n backend c\u1ea7n bi\u1ebft li\u1ec7u m\u1ed9t cu\u1ed9c g\u1ecdi c\u00f3 ph\u1ea3i l\u00e0 ch\u1eb7n hay kh\u00f4ng ch\u1eb7n. N\u1ebfu s\u01a1 \u0111\u1ed3 th\u1ec3 hi\u1ec7n m\u1ed9t tin nh\u1eafn t\u1eeb Controller \u0111\u1ebfn Service, nh\u01b0ng kh\u00f4ng x\u00e1c \u0111\u1ecbnh r\u00f5 Controller c\u00f3 ch\u1edd ph\u1ea3n h\u1ed3i hay kh\u00f4ng, \u0111\u1ed9i backend c\u00f3 th\u1ec3 tri\u1ec3n khai m\u1ed9t y\u00eau c\u1ea7u HTTP ch\u1eb7n trong khi \u00fd \u0111\u1ecbnh l\u00e0 m\u00f4 h\u00ecnh g\u1eedi \u0111i r\u1ed3i qu\u00ean. S\u1ef1 sai l\u1ec7ch n\u00e0y g\u00e2y ra c\u00e1c \u0111i\u1ec3m ngh\u1ebdn hi\u1ec7u su\u1ea5t.<\/p>\n

    T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn qu\u00e1 tr\u00ecnh tri\u1ec3n khai<\/h3>\n
      \n
    • Ch\u1eb7n vs. Kh\u00f4ng ch\u1eb7n:<\/strong>C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c cu\u1ed9c g\u1ecdi HTTP \u0111\u1ed3ng b\u1ed9 cho c\u00e1c t\u00e1c v\u1ee5 n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf n\u1ec1n, l\u00e0m \u0111\u00f4ng c\u1ee9ng lu\u1ed3ng ch\u00ednh.<\/li>\n
    • X\u1eed l\u00fd th\u1eddi gian ch\u1edd:<\/strong>N\u1ebfu h\u01b0\u1edbng lu\u1ed3ng kh\u00f4ng r\u00f5 r\u00e0ng, th\u1eddi gian ch\u1edd l\u1ed7i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp sai, d\u1eabn \u0111\u1ebfn l\u1ed7i x\u1ea3y ra qu\u00e1 s\u1edbm.<\/li>\n
    • Ph\u1ee5 thu\u1ed9c v\u00f2ng:<\/strong>H\u01b0\u1edbng kh\u00f4ng r\u00f5 r\u00e0ng c\u00f3 th\u1ec3 che gi\u1ea5u c\u00e1c tham chi\u1ebfu v\u00f2ng, khi\u1ebfn h\u1ec7 th\u1ed1ng tr\u1edf n\u00ean kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/li>\n<\/ul>\n

      Sai l\u1ea7m 2: Thi\u1ebfu tin nh\u1eafn tr\u1ea3 v\u1ec1 \ud83d\udeab<\/h2>\n

      S\u01a1 \u0111\u1ed3 giao ti\u1ebfp th\u01b0\u1eddng t\u1eadp trung m\u1ea1nh v\u00e0o \u0111\u01b0\u1eddng \u0111i c\u1ee7a y\u00eau c\u1ea7u. C\u00e1c nh\u00e0 thi\u1ebft k\u1ebf v\u1ebd \u0111\u01b0\u1eddng t\u1eeb ng\u01b0\u1eddi kh\u1edfi t\u1ea1o \u0111\u1ebfn \u0111\u1ed1i t\u01b0\u1ee3ng m\u1ee5c ti\u00eau nh\u01b0ng qu\u00ean v\u1ebd \u0111\u01b0\u1eddng tr\u1ea3 v\u1ec1. M\u1eb7c d\u00f9 m\u1ed9t s\u1ed1 k\u00fd hi\u1ec7u ng\u1ee5 \u00fd s\u1ef1 tr\u1ea3 v\u1ec1, nh\u01b0ng tin nh\u1eafn tr\u1ea3 v\u1ec1 r\u00f5 r\u00e0ng an to\u00e0n h\u01a1n cho c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p. Kh\u00f4ng c\u00f3 tin nh\u1eafn tr\u1ea3 v\u1ec1, s\u1ebd kh\u00f4ng r\u00f5 r\u00e0ng li\u1ec7u d\u1eef li\u1ec7u c\u00f3 \u0111ang \u0111\u01b0\u1ee3c tr\u1ea3 l\u1ea1i hay t\u01b0\u01a1ng t\u00e1c l\u00e0 m\u1ed9t chi\u1ec1u. \ud83d\udced<\/p>\n

      \u0110\u1ed1i v\u1edbi c\u00e1c \u0111\u1ed9i backend, vi\u1ec7c bi\u1ebft d\u1eef li\u1ec7u n\u00e0o \u0111\u01b0\u1ee3c tr\u1ea3 v\u1ec1 l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh ph\u1ea3n h\u1ed3i. N\u1ebfu s\u01a1 \u0111\u1ed3 th\u1ec3 hi\u1ec7n m\u1ed9t tin nh\u1eafn \u0111\u01b0\u1ee3c g\u1eedi nh\u01b0ng kh\u00f4ng c\u00f3 tin nh\u1eafn n\u00e0o \u0111\u01b0\u1ee3c tr\u1ea3 v\u1ec1, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n c\u00f3 th\u1ec3 cho r\u1eb1ng ph\u1ea3n h\u1ed3i l\u00e0 r\u1ed7ng ho\u1eb7c ch\u1ec9 c\u00f3 m\u00e3 tr\u1ea1ng th\u00e1i. Tr\u00ean th\u1ef1c t\u1ebf, h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 mong \u0111\u1ee3i m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng JSON ph\u1ee9c t\u1ea1p. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn l\u1ed7i gi\u1ea3i m\u00e3 ho\u1eb7c c\u1ea5u tr\u00fac d\u1eef li\u1ec7u kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7 \u1edf ph\u00eda frontend. \ud83d\udeab<\/p>\n

      T\u1ea1i sao \u0111i\u1ec1u n\u00e0y g\u00e2y nh\u1ea7m l\u1eabn<\/h3>\n
        \n
      • Khu\u00f4n m\u1eabu ph\u1ea3n h\u1ed3i:<\/strong>C\u00e1c \u0111\u1ecbnh ngh\u0129a khu\u00f4n m\u1eabu API (nh\u01b0 OpenAPI) s\u1ebd kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7 n\u1ebfu \u0111\u01b0\u1eddng tr\u1ea3 v\u1ec1 b\u1ecb thi\u1ebfu.<\/li>\n
      • C\u1eadp nh\u1eadt tr\u1ea1ng th\u00e1i:<\/strong>N\u1ebfu m\u1ed9t tin nh\u1eafn k\u00edch ho\u1ea1t thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i, s\u01a1 \u0111\u1ed3 n\u00ean th\u1ec3 hi\u1ec7n x\u00e1c nh\u1eadn. Vi\u1ec7c thi\u1ebfu \u0111i\u1ec1u n\u00e0y ng\u1ee5 \u00fd r\u1eb1ng thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i l\u00e0 t\u00f9y ch\u1ecdn.<\/li>\n
      • Qu\u1ea3n l\u00fd giao d\u1ecbch:<\/strong>Trong c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n, vi\u1ec7c bi\u1ebft li\u1ec7u m\u1ed9t giao d\u1ecbch c\u00f3 \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn hay kh\u00f4ng \u0111\u00f2i h\u1ecfi ph\u1ea3i nh\u00ecn th\u1ea5y tin nh\u1eafn x\u00e1c nh\u1eadn.<\/li>\n<\/ul>\n

        Sai l\u1ea7m 3: Quy t\u1eafc \u0111\u1eb7t t\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng k\u00e9m hi\u1ec7u qu\u1ea3 \ud83c\udff7\ufe0f<\/h2>\n

        Nh\u00e3n tr\u00ean c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 tin nh\u1eafn x\u00e1c \u0111\u1ecbnh \u00fd ngh\u0129a ng\u1eef ngh\u0129a c\u1ee7a t\u01b0\u01a1ng t\u00e1c. S\u1eed d\u1ee5ng c\u00e1c t\u00ean chung chung nh\u01b0 \u201cProcess\u201d, \u201cHandle\u201d ho\u1eb7c \u201cData\u201d s\u1ebd t\u1ea1o ra s\u1ef1 c\u1ea3n tr\u1edf ngay l\u1eadp t\u1ee9c. C\u00e1c k\u1ef9 s\u01b0 backend mong \u0111\u1ee3i c\u00e1c thu\u1eadt ng\u1eef c\u1ee5 th\u1ec3 li\u00ean quan \u0111\u1ebfn l\u0129nh v\u1ef1c c\u1ee7a h\u1ecd, ch\u1eb3ng h\u1ea1n nh\u01b0 \u201cAuthService\u201d, \u201cOrderProcessor\u201d ho\u1eb7c \u201cInventoryService\u201d. Nh\u1eefng t\u00ean m\u01a1 h\u1ed3 bu\u1ed9c c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n ph\u1ea3i suy lu\u1eadn ng\u01b0\u1ee3c l\u1ea1i m\u1ee5c \u0111\u00edch. \ud83e\udd37\u200d\u2642\ufe0f<\/p>\n

        Khi t\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng kh\u1edbp v\u1edbi t\u00ean l\u1edbp ho\u1eb7c module th\u1ef1c t\u1ebf trong c\u01a1 s\u1edf m\u00e3 ngu\u1ed3n, \u0111i\u1ec1u n\u00e0y l\u00e0m t\u0103ng th\u1eddi gian c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u00e0m quen. C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n ph\u1ea3i \u0111o\u00e1n m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa s\u01a1 \u0111\u1ed3 v\u00e0 c\u1ea5u tr\u00fac kho l\u01b0u tr\u1eef. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t nguy hi\u1ec3m trong c\u00e1c h\u1ec7 th\u1ed1ng l\u1edbn khi nhi\u1ec1u \u0111\u1ed9i c\u00f9ng chia s\u1ebb m\u1ed9t s\u01a1 \u0111\u1ed3. \ud83c\udfd7\ufe0f<\/p>\n

        C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t v\u1ec1 \u0111\u1eb7t t\u00ean<\/h3>\n
          \n
        • S\u1eed d\u1ee5ng ng\u00f4n ng\u1eef l\u0129nh v\u1ef1c:<\/strong>Th\u1ef1c hi\u1ec7n ng\u00f4n ng\u1eef ph\u1ed5 bi\u1ebfn c\u1ee7a l\u0129nh v\u1ef1c kinh doanh.<\/li>\n
        • Ti\u1ec1n t\u1ed1 nh\u1ea5t qu\u00e1n:<\/strong>\u0110\u1ea3m b\u1ea3o t\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng tu\u00e2n theo m\u1ed9t m\u1eabu nh\u1ea5t qu\u00e1n (v\u00ed d\u1ee5: t\u1ea5t c\u1ea3 c\u00e1c d\u1ecbch v\u1ee5 \u0111\u1ec1u k\u1ebft th\u00fac b\u1eb1ng \u201cService\u201d).<\/li>\n
        • Tr\u00e1nh vi\u1ebft t\u1eaft:<\/strong>Vi\u1ebft \u0111\u1ea7y \u0111\u1ee7 c\u00e1c t\u1eeb vi\u1ebft t\u1eaft tr\u1eeb khi ch\u00fang \u0111\u01b0\u1ee3c hi\u1ec3u ph\u1ed5 bi\u1ebfn trong \u0111\u1ed9i nh\u00f3m.<\/li>\n<\/ul>\n

          Sai l\u1ea7m 4: L\u00e0m ph\u1ee9c t\u1ea1p qu\u00e1 m\u1ee9c v\u1edbi qu\u00e1 nhi\u1ec1u \u0111\u1ed1i t\u01b0\u1ee3ng \ud83c\udfa2<\/h2>\n

          S\u01a1 \u0111\u1ed3 giao ti\u1ebfp n\u00ean t\u1eadp trung v\u00e0o t\u01b0\u01a1ng t\u00e1c c\u1ee5 th\u1ec3 \u0111ang \u0111\u01b0\u1ee3c ghi ch\u00e9p. Tuy nhi\u00ean, \u0111\u00f4i khi ng\u01b0\u1eddi thi\u1ebft k\u1ebf bao g\u1ed3m m\u1ecdi \u0111\u1ed1i t\u01b0\u1ee3ng trong h\u1ec7 th\u1ed1ng \u0111\u1ec3 cung c\u1ea5p ‘b\u1ed1i c\u1ea3nh \u0111\u1ea7y \u0111\u1ee7’. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn m\u1ed9t s\u01a1 \u0111\u1ed3 h\u1ed7n \u0111\u1ed9n, n\u01a1i lu\u1ed3ng ch\u00ednh b\u1ecb m\u1ea5t gi\u1eefa c\u00e1c m\u1ed1i ph\u1ee5 thu\u1ed9c kh\u00f4ng li\u00ean quan. \ud83c\udf2a\ufe0f<\/p>\n

          C\u00e1c \u0111\u1ed9i backend c\u1ea7n hi\u1ec3u \u0111\u01b0\u1ee3c \u0111\u01b0\u1eddng \u0111i quan tr\u1ecdng. N\u1ebfu m\u1ed9t s\u01a1 \u0111\u1ed3 hi\u1ec3n th\u1ecb 50 \u0111\u1ed1i t\u01b0\u1ee3ng, nh\u00e0 ph\u00e1t tri\u1ec3n kh\u00f4ng th\u1ec3 nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh 5 \u0111\u1ed1i t\u01b0\u1ee3ng th\u1ef1c s\u1ef1 quan tr\u1ecdng cho t\u00ednh n\u0103ng c\u1ee5 th\u1ec3. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng t\u00ea li\u1ec7t ph\u00e2n t\u00edch. H\u1ecd c\u00f3 th\u1ec3 l\u00e3ng ph\u00ed th\u1eddi gian \u0111\u1ecdc c\u00e1c t\u01b0\u01a1ng t\u00e1c kh\u00f4ng li\u00ean quan \u0111\u1ebfn nhi\u1ec7m v\u1ee5 hi\u1ec7n t\u1ea1i. \u0110\u01a1n gi\u1ea3n h\u00f3a l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 giao ti\u1ebfp hi\u1ec7u qu\u1ea3. \ud83d\udd0d<\/p>\n

          Chi\u1ebfn l\u01b0\u1ee3c \u0111\u01a1n gi\u1ea3n h\u00f3a<\/h3>\n
            \n
          • T\u1eadp trung v\u00e0o t\u00ecnh hu\u1ed1ng:<\/strong>Ch\u1ec9 bao g\u1ed3m c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng tham gia v\u00e0o tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3.<\/li>\n
          • T\u1ed5ng quan h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng b\u00ean ngo\u00e0i:<\/strong>Bi\u1ec3u di\u1ec5n c\u00e1c API b\u00ean th\u1ee9 ba nh\u01b0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng b\u00ean ngo\u00e0i duy nh\u1ea5t thay v\u00ec chi ti\u1ebft h\u00f3a logic n\u1ed9i b\u1ed9 c\u1ee7a ch\u00fang.<\/li>\n
          • S\u1eed d\u1ee5ng h\u1ed9p bao g\u1ed3m:<\/strong>N\u1ebfu m\u1ed9t qu\u00e1 tr\u00ecnh con ph\u1ee9c t\u1ea1p, h\u00e3y bao b\u1ecdc n\u00f3 trong m\u1ed9t h\u1ed9p v\u00e0 li\u00ean k\u1ebft \u0111\u1ebfn m\u1ed9t s\u01a1 \u0111\u1ed3 chi ti\u1ebft ri\u00eang bi\u1ec7t.<\/li>\n<\/ul>\n

            Sai l\u1ea7m 5: B\u1ecf qua v\u00f2ng \u0111\u1eddi v\u00e0 tr\u1ea1ng th\u00e1i \ud83d\udd04<\/h2>\n

            C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 tr\u1ea1ng th\u00e1i. M\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 l\u00e0 \u201c\u0110ang ho\u1ea1t \u0111\u1ed9ng\u201d, \u201cB\u1ecb t\u1ea1m d\u1eebng\u201d ho\u1eb7c \u201c\u0110\u00e3 x\u00f3a\u201d. M\u1ed9t s\u01a1 \u0111\u1ed3 giao ti\u1ebfp b\u1ecf qua c\u00e1c chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn l\u1ed7i logic. V\u00ed d\u1ee5, m\u1ed9t tin nh\u1eafn c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng m\u00e0 theo tr\u1ea1ng th\u00e1i hi\u1ec7n t\u1ea1i c\u1ee7a n\u00f3, kh\u00f4ng th\u1ec3 x\u1eed l\u00fd \u0111\u01b0\u1ee3c. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t \u201cchuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i kh\u00f4ng h\u1ee3p l\u1ec7\u201d. \u26d4<\/p>\n

            C\u00e1c k\u1ef9 s\u01b0 backend tri\u1ec3n khai m\u00e1y tr\u1ea1ng th\u00e1i d\u1ef1a tr\u00ean c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y. N\u1ebfu s\u01a1 \u0111\u1ed3 kh\u00f4ng hi\u1ec3n th\u1ecb \u0111i\u1ec1u ki\u1ec7n ti\u00ean quy\u1ebft cho m\u1ed9t tin nh\u1eafn, m\u00e3 ngu\u1ed3n s\u1ebd c\u1ea7n l\u1eadp tr\u00ecnh ph\u00f2ng th\u1ee7 \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c tr\u1ea1ng th\u00e1i kh\u00f4ng h\u1ee3p l\u1ec7. \u0110i\u1ec1u n\u00e0y l\u00e0m t\u0103ng \u0111\u1ed9 ph\u1ee9c t\u1ea1p kh\u00f4ng c\u1ea7n thi\u1ebft v\u00e0 ti\u1ec1m \u1ea9n l\u1ed7i cho h\u1ec7 th\u1ed1ng. \ud83d\udc1e<\/p>\n

            C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t v\u1ec1 tr\u1ea1ng th\u00e1i<\/h3>\n
              \n
            • \u0110i\u1ec1u ki\u1ec7n ti\u00ean quy\u1ebft:<\/strong>Hi\u1ec3n th\u1ecb tr\u1ea1ng th\u00e1i m\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ph\u1ea3i \u1edf \u0111\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c m\u1ed9t tin nh\u1eafn.<\/li>\n
            • \u0110i\u1ec1u ki\u1ec7n h\u1eadu qu\u1ea3:<\/strong>Ch\u1ec9 ra tr\u1ea1ng th\u00e1i m\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng chuy\u1ec3n sang sau khi x\u1eed l\u00fd tin nh\u1eafn.<\/li>\n
            • C\u00e1c \u0111i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7:<\/strong>N\u1ebfu m\u1ed9t tin nh\u1eafn l\u00e0 \u0111i\u1ec1u ki\u1ec7n, h\u00e3y \u0111\u00e1nh d\u1ea5u s\u01a1 \u0111\u1ed3 v\u1edbi \u0111i\u1ec1u ki\u1ec7n \u0111\u00f3.<\/li>\n<\/ul>\n

              L\u1ed7i 6: Thi\u1ebfu s\u1ed1 th\u1ee9 t\u1ef1 \ud83d\udcd1<\/h2>\n

              Khi nhi\u1ec1u tin nh\u1eafn \u0111\u01b0\u1ee3c g\u1eedi gi\u1eefa hai \u0111\u1ed1i t\u01b0\u1ee3ng gi\u1ed1ng nhau, th\u1ee9 t\u1ef1 l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng. Kh\u00f4ng c\u00f3 s\u1ed1 th\u1ee9 t\u1ef1, s\u1ebd kh\u00f4ng th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c tin nh\u1eafn n\u00e0o x\u1ea3y ra tr\u01b0\u1edbc. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c thao t\u00e1c ph\u1ee5 thu\u1ed9c v\u00e0o qu\u00e1 tr\u00ecnh kh\u1edfi t\u1ea1o. V\u00ed d\u1ee5, m\u1ed9t tin nh\u1eafn “\u0110\u0103ng nh\u1eadp” ph\u1ea3i x\u1ea3y ra tr\u01b0\u1edbc tin nh\u1eafn “L\u1ea5y h\u1ed3 s\u01a1”. \ud83d\udcdd<\/p>\n

              C\u00e1c nh\u00f3m backend ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ed1 th\u1ee9 t\u1ef1 \u0111\u1ec3 th\u1ef1c hi\u1ec7n ki\u1ec3m so\u00e1t lu\u1ed3ng logic. N\u1ebfu th\u1ee9 t\u1ef1 kh\u00f4ng r\u00f5 r\u00e0ng, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n c\u00f3 th\u1ec3 gi\u1ea3 \u0111\u1ecbnh m\u1ed9t th\u1ee9 t\u1ef1 c\u1ee5 th\u1ec3 kh\u00f4ng kh\u1edbp v\u1edbi s\u01a1 \u0111\u1ed3. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c t\u00ecnh hu\u1ed1ng c\u1ea1nh tranh ho\u1eb7c l\u1ed7i kh\u1edfi t\u1ea1o. Trong c\u00e1c h\u1ec7 th\u1ed1ng b\u1ea5t \u0111\u1ed3ng b\u1ed9, s\u1ed1 th\u1ee9 t\u1ef1 gi\u00fap theo d\u00f5i th\u1ee9 t\u1ef1 c\u00e1c s\u1ef1 ki\u1ec7n. \ud83d\udd52<\/p>\n

              L\u1ed7i 7: \u0110a d\u1ea1ng kh\u00f4ng nh\u1ea5t qu\u00e1n \ud83d\udcca<\/h2>\n

              \u0110a d\u1ea1ng x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng th\u1ec3 hi\u1ec7n c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng tham gia v\u00e0o t\u01b0\u01a1ng t\u00e1c. M\u1ed9t “1” c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t th\u1ec3 hi\u1ec7n, “0..*” c\u00f3 ngh\u0129a l\u00e0 kh\u00f4ng c\u00f3 ho\u1eb7c nhi\u1ec1u h\u01a1n. N\u1ebfu s\u01a1 \u0111\u1ed3 hi\u1ec3n th\u1ecb m\u1ed9t tin nh\u1eafn t\u1eeb m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ebfn m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng, th\u00ec \u0111a d\u1ea1ng ph\u1ea3i r\u00f5 r\u00e0ng. Vi\u1ec7c ghi ch\u00fa kh\u00f4ng nh\u1ea5t qu\u00e1n \u1edf \u0111\u00e2y d\u1eabn \u0111\u1ebfn s\u1ef1 nh\u1ea7m l\u1eabn v\u1ec1 vi\u1ec7c h\u1ec7 th\u1ed1ng x\u1eed l\u00fd c\u00e1c m\u1ee5c \u0111\u01a1n l\u1ebb hay c\u00e1c nh\u00f3m. \ud83d\udce6<\/p>\n

              Logic backend th\u01b0\u1eddng thay \u0111\u1ed5i d\u1ef1a tr\u00ean \u0111a d\u1ea1ng. M\u1ed9t y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi m\u1ed9t m\u1ee5c duy nh\u1ea5t c\u00f3 th\u1ec3 tr\u1ea3 v\u1ec1 ph\u1ea3n h\u1ed3i tr\u1ef1c ti\u1ebfp. M\u1ed9t y\u00eau c\u1ea7u nh\u00f3m c\u00f3 th\u1ec3 tr\u1ea3 v\u1ec1 b\u1ea3n t\u00f3m t\u1eaft ho\u1eb7c danh s\u00e1ch c\u00e1c ID. N\u1ebfu s\u01a1 \u0111\u1ed3 kh\u00f4ng x\u00e1c \u0111\u1ecbnh \u0111i\u1ec1u n\u00e0y, \u0111i\u1ec3m cu\u1ed1i API c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf sai. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn s\u1ef1 kh\u00f4ng kh\u1edbp gi\u1eefa d\u1eef li\u1ec7u mong \u0111\u1ee3i v\u00e0 ph\u1ea3n h\u1ed3i th\u1ef1c t\u1ebf. \ud83d\udeab<\/p>\n

              T\u00f3m t\u1eaft c\u00e1c l\u1ed7i ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c \ud83d\udccb<\/h2>\n

              B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y t\u00f3m t\u1eaft c\u00e1c l\u1ed7i \u0111\u00e3 th\u1ea3o lu\u1eadn v\u00e0 cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p c\u1ee5 th\u1ec3 cho c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 v\u00e0 nh\u00e0 thi\u1ebft k\u1ebf.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
              L\u1ed7i<\/th>\nT\u00e1c \u0111\u1ed9ng \u0111\u1ebfn nh\u00f3m backend<\/th>\nGi\u1ea3i ph\u00e1p \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb<\/th>\n<\/tr>\n<\/thead>\n
              Lu\u1ed3ng kh\u00f4ng r\u00f5 r\u00e0ng<\/td>\nThi\u1ebft l\u1eadp sai gi\u1eefa \u0111\u1ed3ng b\u1ed9 v\u00e0 b\u1ea5t \u0111\u1ed3ng b\u1ed9<\/td>\nS\u1eed d\u1ee5ng \u0111\u1ea7u m\u0169i t\u00ean kh\u00e1c nhau cho y\u00eau c\u1ea7u v\u00e0 ph\u1ea3n h\u1ed3i<\/td>\n<\/tr>\n
              Thi\u1ebfu ph\u1ea3n h\u1ed3i<\/td>\nC\u00e1c l\u01b0\u1ee3c \u0111\u1ed3 ph\u1ea3n h\u1ed3i v\u00e0 c\u1ea5u tr\u00fac d\u1eef li\u1ec7u ch\u01b0a \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh<\/td>\nV\u1ebd r\u00f5 r\u00e0ng c\u00e1c m\u0169i t\u00ean ph\u1ea3n h\u1ed3i k\u00e8m nh\u00e3n d\u1eef li\u1ec7u<\/td>\n<\/tr>\n
              T\u00ean g\u1ecdi k\u00e9m<\/td>\nKh\u00f3 kh\u0103n trong vi\u1ec7c \u00e1nh x\u1ea1 thi\u1ebft k\u1ebf v\u00e0o c\u01a1 s\u1edf m\u00e3 ngu\u1ed3n<\/td>\nS\u1eed d\u1ee5ng thu\u1eadt ng\u1eef chu\u1ea9n trong l\u0129nh v\u1ef1c chuy\u00ean m\u00f4n<\/td>\n<\/tr>\n
              Qu\u00e1 nhi\u1ec1u \u0111\u1ed1i t\u01b0\u1ee3ng<\/td>\nCh\u1eadm tr\u1ec5 ph\u00e2n t\u00edch v\u00e0 m\u1ea5t t\u1eadp trung<\/td>\nH\u1ea1n ch\u1ebf ph\u1ea1m vi v\u00e0o t\u00ecnh hu\u1ed1ng t\u01b0\u01a1ng t\u00e1c c\u1ee5 th\u1ec3<\/td>\n<\/tr>\n
              B\u1ecf qua tr\u1ea1ng th\u00e1i<\/td>\nChuy\u1ec3n tr\u1ea1ng th\u00e1i kh\u00f4ng h\u1ee3p l\u1ec7 trong m\u00e3 ngu\u1ed3n<\/td>\nBao g\u1ed3m nh\u00e3n tr\u1ea1ng th\u00e1i tr\u00ean c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 chuy\u1ec3n ti\u1ebfp<\/td>\n<\/tr>\n
              Kh\u00f4ng c\u00f3 s\u1ed1 th\u1ee9 t\u1ef1<\/td>\nC\u00e1c t\u00ecnh hu\u1ed1ng c\u1ea1nh tranh v\u00e0 l\u1ed7i logic<\/td>\n\u0110\u00e1nh s\u1ed1 c\u00e1c tin nh\u1eafn theo th\u1ee9 t\u1ef1 d\u1ecdc theo lu\u1ed3ng<\/td>\n<\/tr>\n
              \u0110a d\u1ea1ng kh\u00f4ng nh\u1ea5t qu\u00e1n<\/td>\nX\u1eed l\u00fd sai gi\u1eefa l\u00f4 h\u00e0ng v\u00e0 t\u1eebng m\u1ee5c ri\u00eang l\u1ebb<\/td>\nR\u00f5 r\u00e0ng ghi ch\u00fa t\u00ednh ch\u1ea5t s\u1ed1 l\u01b0\u1ee3ng (1, 0..*, 1..*)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

              Hi\u1ec7u \u1ee9ng lan truy\u1ec1n trong ph\u00e1t tri\u1ec3n \ud83c\udf0a<\/h2>\n

              Khi m\u1ed9t s\u01a1 \u0111\u1ed3 giao ti\u1ebfp b\u1ecb l\u1ed7i, chi ph\u00ed s\u1eeda ch\u1eefa s\u1ebd t\u0103ng theo c\u1ea5p s\u1ed1 nh\u00e2n khi d\u1ef1 \u00e1n ti\u1ebfn tri\u1ec3n. M\u1ed9t sai s\u00f3t ph\u00e1t hi\u1ec7n trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf ch\u1ec9 c\u1ea7n ch\u1ec9nh s\u1eeda \u0111\u01a1n gi\u1ea3n. M\u1ed9t sai s\u00f3t ph\u00e1t hi\u1ec7n trong giai \u0111o\u1ea1n tri\u1ec3n khai backend y\u00eau c\u1ea7u t\u00e1i c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n. M\u1ed9t sai s\u00f3t ph\u00e1t hi\u1ec7n trong m\u00f4i tr\u01b0\u1eddng s\u1ea3n xu\u1ea5t \u0111\u00f2i h\u1ecfi s\u1eeda l\u1ed7i ngay l\u1eadp t\u1ee9c v\u00e0 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn ng\u1eebng ho\u1ea1t \u0111\u1ed9ng. \ud83d\udcc9<\/p>\n

              C\u00e1c k\u1ef9 s\u01b0 backend d\u00e0nh m\u1ed9t ph\u1ea7n l\u1edbn th\u1eddi gian \u0111\u1ec3 x\u00e1c minh c\u00e1c gi\u1ea3 \u0111\u1ecbnh. N\u1ebfu s\u01a1 \u0111\u1ed3 sai, h\u1ecd ph\u1ea3i m\u1ea5t th\u1eddi gian l\u00e0m r\u00f5 v\u1edbi c\u00e1c ki\u1ebfn tr\u00fac s\u01b0. Chi ph\u00ed giao ti\u1ebfp n\u00e0y l\u00e0m ch\u1eadm t\u1ed1c \u0111\u1ed9 ph\u00e1t tri\u1ec3n c\u1ee7a nh\u00f3m. S\u01a1 \u0111\u1ed3 r\u00f5 r\u00e0ng gi\u00fap gi\u1ea3m nhu c\u1ea7u trao \u0111\u1ed5i qua l\u1ea1i. \u23f3<\/p>\n

              \u0110\u1ea3m b\u1ea3o s\u1ef1 r\u00f5 r\u00e0ng cho c\u00e1c nh\u00f3m ph\u00e2n t\u00e1n \ud83c\udf0d<\/h2>\n

              Trong ph\u00e1t tri\u1ec3n hi\u1ec7n \u0111\u1ea1i, c\u00e1c nh\u00f3m th\u01b0\u1eddng ph\u00e2n t\u00e1n \u1edf nhi\u1ec1u m\u00fai gi\u1edd kh\u00e1c nhau. S\u01a1 \u0111\u1ed3 giao ti\u1ebfp \u0111\u00f3ng vai tr\u00f2 l\u00e0 ngu\u1ed3n th\u00f4ng tin ch\u00ednh x\u00e1c m\u00e0 m\u1ecdi ng\u01b0\u1eddi c\u00f3 th\u1ec3 tham kh\u1ea3o m\u1ed9t c\u00e1ch b\u1ea5t \u0111\u1ed3ng b\u1ed9. N\u1ebfu s\u01a1 \u0111\u1ed3 ph\u1ee5 thu\u1ed9c v\u00e0o ng\u1eef c\u1ea3nh n\u00f3i chuy\u1ec7n ho\u1eb7c c\u00e1c quy \u01b0\u1edbc kh\u00f4ng \u0111\u01b0\u1ee3c ghi ch\u00e9p, th\u00ec n\u00f3 s\u1ebd th\u1ea5t b\u1ea1i trong m\u1ee5c \u0111\u00edch n\u00e0y. \ud83d\uddfa\ufe0f<\/p>\n

              M\u1ed7i bi\u1ec3u t\u01b0\u1ee3ng, \u0111\u01b0\u1eddng n\u00e9t v\u00e0 nh\u00e3n ph\u1ea3i t\u1ef1 gi\u1ea3i th\u00edch \u0111\u01b0\u1ee3c. N\u1ebfu m\u1ed9t k\u1ef9 s\u01b0 backend t\u1eeb nh\u00f3m kh\u00e1c xem s\u01a1 \u0111\u1ed3, h\u1ecd ph\u1ea3i hi\u1ec3u \u0111\u01b0\u1ee3c lu\u1ed3ng ho\u1ea1t \u0111\u1ed9ng m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i h\u1ecfi ng\u01b0\u1eddi thi\u1ebft k\u1ebf ban \u0111\u1ea7u. S\u1ef1 chu\u1ea9n h\u00f3a n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 m\u1edf r\u1ed9ng c\u00e1c t\u1ed5 ch\u1ee9c k\u1ef9 thu\u1eadt. \ud83d\udcc8<\/p>\n

              C\u00e1c y\u1ebfu t\u1ed1 k\u1ef9 thu\u1eadt c\u1ea7n l\u01b0u \u00fd \u0111\u1ed1i v\u1edbi ki\u1ebfn tr\u00fac s\u01b0 backend \ud83c\udfdb\ufe0f<\/h2>\n

              Khi xem x\u00e9t s\u01a1 \u0111\u1ed3 giao ti\u1ebfp, c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 backend n\u00ean ch\u00fa \u00fd \u0111\u1ebfn c\u00e1c chi ti\u1ebft k\u1ef9 thu\u1eadt c\u1ee5 th\u1ec3:<\/p>\n

                \n
              • Ki\u1ec3u d\u1eef li\u1ec7u:<\/strong>C\u00e1c ki\u1ec3u d\u1eef li\u1ec7u c\u00f3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh cho t\u1eebng th\u00f4ng \u0111i\u1ec7p kh\u00f4ng? (v\u00ed d\u1ee5: Chu\u1ed7i, S\u1ed1 nguy\u00ean, \u0110\u1ed1i t\u01b0\u1ee3ng)<\/li>\n
              • M\u00e3 l\u1ed7i:<\/strong>S\u01a1 \u0111\u1ed3 c\u00f3 th\u1ec3 hi\u1ec7n \u0111i\u1ec1u g\u00ec x\u1ea3y ra khi m\u1ed9t th\u00f4ng \u0111i\u1ec7p th\u1ea5t b\u1ea1i kh\u00f4ng?<\/li>\n
              • B\u1ea3o m\u1eadt:<\/strong>C\u00e1c token x\u00e1c th\u1ef1c c\u00f3 \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb \u1edf nh\u1eefng n\u01a1i c\u1ea7n thi\u1ebft kh\u00f4ng?<\/li>\n
              • Hi\u1ec7u su\u1ea5t:<\/strong>C\u00f3 t\u1ed3n t\u1ea1i v\u00f2ng l\u1eb7p ho\u1eb7c l\u1eddi g\u1ecdi \u0111\u1ec7 quy n\u00e0o c\u00f3 th\u1ec3 g\u00e2y tr\u00e0n ng\u0103n x\u1ebfp kh\u00f4ng?<\/li>\n<\/ul>\n

                Suy ngh\u0129 cu\u1ed1i c\u00f9ng v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng s\u01a1 \u0111\u1ed3 \ud83c\udfaf<\/h2>\n

                S\u01a1 \u0111\u1ed3 giao ti\u1ebfp l\u00e0 c\u00f4ng c\u1ee5 \u0111\u1ec3 suy ngh\u0129, ch\u1ee9 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 v\u1ebd. Gi\u00e1 tr\u1ecb c\u1ee7a n\u00f3 n\u1eb1m \u1edf s\u1ef1 r\u00f5 r\u00e0ng m\u00e0 n\u00f3 mang l\u1ea1i cho c\u00e1c t\u01b0\u01a1ng t\u00e1c ph\u1ee9c t\u1ea1p. B\u1eb1ng c\u00e1ch tr\u00e1nh nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn, b\u1ea1n trao quy\u1ec1n cho \u0111\u1ed9i ng\u0169 backend x\u00e2y d\u1ef1ng c\u00e1c h\u1ec7 th\u1ed1ng b\u1ec1n v\u1eefng, d\u1ec5 b\u1ea3o tr\u00ec v\u00e0 hi\u1ec7u su\u1ea5t cao. S\u1ef1 ch\u00ednh x\u00e1c trong thi\u1ebft k\u1ebf d\u1eabn \u0111\u1ebfn s\u1ef1 ch\u00ednh x\u00e1c trong th\u1ef1c thi. \ud83d\udd27<\/p>\n

                Ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n theo danh s\u00e1ch ki\u1ec3m tra \u0111\u01b0\u1ee3c cung c\u1ea5p. Khuy\u1ebfn kh\u00edch ph\u1ea3n h\u1ed3i t\u1eeb c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n s\u1ebd s\u1eed d\u1ee5ng ch\u00fang. Xem t\u00e0i li\u1ec7u nh\u01b0 m\u1ed9t t\u00e1c ph\u1ea9m s\u1ed1ng \u0111\u1ed9ng, lu\u00f4n thay \u0111\u1ed5i theo h\u1ec7 th\u1ed1ng. C\u00e1ch ti\u1ebfp c\u1eadn h\u1ee3p t\u00e1c n\u00e0y \u0111\u1ea3m b\u1ea3o b\u1ea3n v\u1ebd s\u01a1 \u0111\u1ed3 lu\u00f4n ch\u00ednh x\u00e1c v\u00e0 h\u1eefu \u00edch trong su\u1ed1t v\u00f2ng \u0111\u1eddi d\u1ef1 \u00e1n. \ud83d\udd04<\/p>\n

                Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n l\u01b0u \u00fd \ud83d\udccc<\/h2>\n
                  \n
                • S\u1ef1 r\u00f5 r\u00e0ng trong lu\u1ed3ng tin nh\u1eafn gi\u00fap ng\u0103n ng\u1eeba s\u1ef1 nh\u1ea7m l\u1eabn gi\u1eefa x\u1eed l\u00fd \u0111\u1ed3ng b\u1ed9 v\u00e0 b\u1ea5t \u0111\u1ed3ng b\u1ed9.<\/li>\n
                • C\u00e1c tin nh\u1eafn tr\u1ea3 v\u1ec1 r\u00f5 r\u00e0ng \u0111\u1ea3m b\u1ea3o m\u00f4 h\u00ecnh h\u00f3a d\u1eef li\u1ec7u ch\u00ednh x\u00e1c.<\/li>\n
                • T\u00ean g\u1ecdi nh\u1ea5t qu\u00e1n gi\u00fap gi\u1ea3m t\u1ea3i nh\u1eadn th\u1ee9c cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n.<\/li>\n
                • H\u1ea1n ch\u1ebf ph\u1ea1m vi c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ec3 duy tr\u00ec s\u1ef1 t\u1eadp trung.<\/li>\n
                • C\u00e1c chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i ph\u1ea3i \u0111\u01b0\u1ee3c ghi ch\u00e9p \u0111\u1ec3 ng\u0103n ng\u1eeba l\u1ed7i logic.<\/li>\n
                • S\u1ed1 th\u1ee9 t\u1ef1 x\u00e1c \u0111\u1ecbnh th\u1ee9 t\u1ef1 th\u1ef1c hi\u1ec7n c\u00e1c thao t\u00e1c.<\/li>\n
                • T\u00ednh \u0111a d\u1ea1ng l\u00e0m r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa x\u1eed l\u00fd \u0111\u01a1n l\u1ebb v\u00e0 x\u1eed l\u00fd theo l\u00f4.<\/li>\n<\/ul>\n

                  \u0110\u1ea7u t\u01b0 th\u1eddi gian v\u00e0o c\u00e1c s\u01a1 \u0111\u1ed3 ch\u1ea5t l\u01b0\u1ee3ng cao s\u1ebd ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c th\u1eddi gian \u0111\u00e1ng k\u1ec3 trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n v\u00e0 b\u1ea3o tr\u00ec. \u0110\u00e2y l\u00e0 m\u1ed9t th\u1ef1c h\u00e0nh n\u1ec1n t\u1ea3ng cho th\u00e0nh c\u00f4ng trong k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m. \ud83c\udfd7\ufe0f<\/p>\n","protected":false},"excerpt":{"rendered":"

                  Thi\u1ebft k\u1ebf ki\u1ebfn tr\u00fac h\u1ec7 th\u1ed1ng \u0111\u00f2i h\u1ecfi nhi\u1ec1u h\u01a1n ch\u1ec9 vi\u1ec7c v\u1ebd c\u00e1c h\u00ecnh h\u1ed9p v\u00e0 m\u0169i t\u00ean. N\u00f3 \u0111\u00f2i h\u1ecfi s\u1ef1 ch\u00ednh x\u00e1c, r\u00f5 r\u00e0ng v\u00e0 hi\u1ec3u bi\u1ebft…<\/p>\n","protected":false},"author":1,"featured_media":953,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"Nh\u1eefng sai l\u1ea7m trong s\u01a1 \u0111\u1ed3 giao ti\u1ebfp khi\u1ebfn \u0111\u1ed9i ng\u0169 backend b\u1ed1i r\u1ed1i","_yoast_wpseo_metadesc":"Kh\u00e1m ph\u00e1 nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn trong s\u01a1 \u0111\u1ed3 giao ti\u1ebfp g\u00e2y c\u1ea3n tr\u1edf ph\u00e1t tri\u1ec3n backend. H\u1ecdc c\u00e1ch kh\u1eafc ph\u1ee5c c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 lu\u1ed3ng, \u0111\u1eb7t t\u00ean v\u00e0 tr\u1ea1ng th\u00e1i \u0111\u1ec3 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng t\u1ed1t h\u01a1n.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[35],"tags":[40,55],"class_list":["post-952","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uml","tag-academic","tag-communication-diagram"],"yoast_head":"\nNh\u1eefng sai l\u1ea7m trong s\u01a1 \u0111\u1ed3 giao ti\u1ebfp khi\u1ebfn \u0111\u1ed9i ng\u0169 backend b\u1ed1i r\u1ed1i<\/title>\n<meta name=\"description\" content=\"Kh\u00e1m ph\u00e1 nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn trong s\u01a1 \u0111\u1ed3 giao ti\u1ebfp g\u00e2y c\u1ea3n tr\u1edf ph\u00e1t tri\u1ec3n backend. 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