ããã«ã¡ã¯ãæ°åã¨ã³ã¸ãã¢ã®å·æ¬ã§ãã BUYMAã®ãµã¼ãã¼ãµã¤ããä¸å¿ã«éçºãã¦ãã¾ãã ãã®è¨äºã¯Enigmo Advent Calendar 2022ã®12æ¥ç®ã®è¨äºã§ãã ãã¼ã¿ã¢ããªã³ã°ã«ã¤ãã¦å¦ç¿ä¸ã§ãDBè¨è¨ã®å ¥éæ¸ãèªãã§è«çè¨è¨ã«ã¤ãã¦ç¬¬1~5æ£è¦åã¨ãã£ãå 容ãå¦ç¿ãã¾ããããããå人éçºã§ãã¼ã¿ã¢ããªã³ã°ãããã¨ãããã©ããããããã®ããããããããæãåãããã¨ã¯ã§ãã¾ããã§ããã ãããªç¶æ³ã®æã«ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ããªã³ã°ã¨ããã¢ããªã³ã°ææ³ã«ã¤ãã¦ç¥ã£ããã¨ããã£ãããã«ããã¼ã¿ã¢ããªã³ã°ãã¤ã¡ã¼ã¸ãããããªãã¾ããã ãã®è¨äºã§ã¯ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ããªã³ã°ãå®è·µãã¦ã¿ã¦æãããã¨ãç´¹ä»ã§ããã°ã¨æãã¾ãã ç®æ¬¡ ãã¼ã¿ã¨æ å ±ã®éã ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ããªã³ã°ã¨ã¯ ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ããªã³ã°ã®æé æ®æ®µRailsã§éçºãã¦ãã¦æããã㨠ã¤ãã¥ã¼
ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ããªã³ã° Q. ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ããªã³ã°ã«ã¤ãã¦æãã¦ãã ããã A. 以ä¸ãChatGPT ã®åçã§ãã ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ããªã³ã°ï¼Immutable Data Modelingï¼ã¯ããã¼ã¿ã¢ããªã³ã°ã®ã¢ããã¼ãã®ä¸ã¤ã§ããã¼ã¿ãä¸å¤ï¼å¤æ´ä¸å¯ï¼ãªå½¢å¼ã§æ±ãæ¹æ³ã§ãããã®ã¢ããã¼ãã§ã¯ããã¼ã¿ãä¸åº¦çæããããããã®å¤ãå¤æ´ãããæ°ãããã¼ã¸ã§ã³ãä½æãããã¨ãä¸è¬çã§ããã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ããªã³ã°ã¯ãåæ£ã·ã¹ãã ããã¼ã¸ã§ã³ç®¡çããã¼ã¿ã®æ´åæ§ãå±¥æ´ã®ãã©ããã³ã°ãªã©ã®ãã¾ãã¾ãªé åã§æç¨ã§ãã 以ä¸ã¯ãã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ããªã³ã°ã®ä¸»è¦ãªç¹å¾´ã¨å©ç¹ã§ãã ãã¼ã¿ã®å®å®æ§ã¨ä¿¡é ¼æ§: ãã¼ã¿ãä¸å¤ã§ãããããä¸åº¦ãã¼ã¿ãè¨é²ããããããããå¤æ´ãããã¨ãã§ããªãããããã¼ã¿ã®ä¿¡é ¼æ§ã¨å®å®æ§ãåä¸ãã¾ããããã¯ãã¨ã©ã¼ããã°ããã¼ã¿ãç ´æãããå¯è½æ§
ã©ããoreoã§ãã ä»åã¯WEB+DB PRESS Vol.130ã®ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ãã«ç¹éãèªãã ã¡ã¢ãè¨è¼ãã¾ãã主ã«èªåç¨ã®è¨äºã§ããããã¼ã¿ã¢ããªã³ã°ã¨ã¯ï¼ã©ãããã®ï¼ã¨ãã£ãæ¹ã®åèã«ãªãã°ã¨æãã¾ãã 1 è¯ããã¼ã¿ã¢ããªã³ã°ã¨ã¯? è¯ããã¼ã¿ã¢ããªã³ã°ã¨ã¯ãã¢ããªã³ã°ã®éç¨ã§èæ ®ããã¦ããªãã£ãè¦æ±ã®ç©´ãã¨ãã¸ã±ã¼ã¹ã®çºè¦ã«ã¤ãªãããã®ããã¼ã¿ã¢ããªã³ã°ã®æ¬è³ªç価å¤ã¯ãä½ææã«ããæ·±ãæ¥åè¦æ±ãåæãã顧客ããã¼ã ã¨ã®å¯¾è©±ãçããã¨ããã®çºããã¼ã¿ã¢ãã«ã¯ã½ããã¦ã§ã¢ã¨ã³ã¸ãã¢ã ãã§ãªãé¢ä¿è å ¨å¡ã®ç解ã®ããã«ãããã«é ããææ§ããè¦æ±ãæ´ãåºããè°è«ããããã«ä½¿ãã 2 ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ãã«ã¨ã¯? ã¢ãã«ãè¤éã«ãªãè¦å ã¯ãã¼ã¿ã®æ´æ°å¦ç(CRUDã®U)ã§ãããã·ã¹ãã ã§æ±ãæ å ±ã¯ã¢ã(ãªã½ã¼ã¹)ã¨ã³ã(ã¤ãã³ã)ã«åé¡ãããã¨ãã§ããããã®ã¤ãã³ãã極éã¾ã§
Efficient, immutable, and thread-safe collection classes for Ruby. The immutable-ruby gem provides 6 Persistent Data Structures: Hash, Vector, Set, SortedSet, List, and Deque (which works as an immutable queue or stack). Whenever you "modify" an Immutable collection, the original is preserved and a modified copy is returned. This makes them inherently thread-safe and shareable. At the same time, t
ããã«ã¡ã¯ããªãµã¼ãã»ã¢ã³ãã»ã¤ããã¼ã·ã§ã³ã®ä¸æ(konk303)ã¨ç³ãã¾ãã ãããããrailsãããããçãªç«å ´ã§ã主ã«ãµã¼ãã¼ãµã¤ãã®éçºããã¦ãã¾ãã Introduction æ¬ç¨¿ã§ã¯Qiitaã®ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ãã«ã¨ webã¢ããªã±ã¼ã·ã§ã³ã«ãããç¾å®è§£ã«ã¤ã³ã¹ãã¤ã¢ããã¦ãå¼ç¤¾ã§ã®ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¸ã®åãçµã¿(ã¨ãã®è¦ãã¿)ãç´¹ä»ãããã¨æãã¾ãã qiita.com ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ãã«ã¨ã¯? ã¾ãã£ã¨å¼ç¨ã ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ãã«ã¨ webã¢ããªã±ã¼ã·ã§ã³ã«ãããç¾å®è§£ - Qiita 詳細ã¯ãªã³ã¯ã«è²ãã¾ããããå±¥æ´ãå ¨ã¦æ®ããããªãã¼ã¿è¨è¨ã«ãã UPDATE ãå»ãããã¨ã§æ å ±ã®è¿½è·¡å¯è½æ§ã確ä¿ãå ç¢ãªè¨è¨ã«ãããã¢ããªã³ã°ææ³ã§ãã ååãã®ææ³ã«å¾ãã¨ãããããæ±ãã¢ãã«ã«ã¯ãªããªãã¨ããåªããã®(é) ã§ããã¤ãã³ããèµ·ãã度ã«æ°è¦ã¬ã³
ããã¯ç¬¬2ã®ãã¯ã³ã´ Advent Calendar 2017ã®5æ¥ç®ã§ã 5æ¥11ææç¹ã§2æ¥æ å½ã® yonex ãã¾ã è¨äºæ¸ãã¦ãªãã§ãããæ°ã«ããç¶ãã¾ããniconico(ã)ã®ãªãªã¼ã¹ãæ¥å¹´ã¨èãã¦æ®å¿µãªæ°æã¡ã§ãã ããã¼èª°ãï¼ ãã¯ã³ã´ Advent Calendarçå¤è³ã£ã½ãã§ãããç§ã¯ãã¯ã³ã´ç¤¾å¡ã§ã¯ããã¾ããã å®å¹´ãã¨ãã«éããããããã§ãã åç½®ã web ã¢ããªã±ã¼ã·ã§ã³ã®éçºã«ããã¦ããã¼ã¿ã¢ããªã³ã°ã¯ã¨ã¦ãéè¦ã§ãã SIerã§ã¯DBAã¨ãè¨ã£ã¦å°éã®è¨è¨æ å½ãããã¿ããã§ãããä¸å°webãµã¼ãã¹ä¼æ¥ã§ããã¾ã§ã®åæ¥ãã§ããããããªãã大ä½ã«ããã¦webã¢ããªã±ã¼ã·ã§ã³(ãµã¼ããµã¤ã)ã¨ã³ã¸ãã¢ãæ å½ãããã¨ã«ãªãã¾ãã ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ã㫠詳細ã¯ãªã³ã¯ã«è²ãã¾ããããå±¥æ´ãå ¨ã¦æ®ããããªãã¼ã¿è¨è¨ã«ãã UPDATE ãå»ãããã¨ã§æ å ±ã®è¿½è·¡å¯è½æ§
CRUDã®ãã¡UPDATEããã£ã¨ãã·ã¹ãã ãè¤éåãããæ´æ°ã«ã¯è¤éãªã«ã¼ã«ãä¼´ãããã ãæ¥åçã«è¤éãªã«ã¼ã«ãåå¨ããã®ã¯ä»æ¹ãªããã¨ãããããã·ã¹ãã ãè¨è¨ã§è¤éããæ´ã«å¢ããªãããã«ããããUPDATEã«çç®ãããã®çºçãã§ããã ãåããã¨ã«ãã£ã¦è¤éããããããããã«ã¯ãã¾ããã¼ã¿ã¢ãã«ããã®ããã«è¨è¨ãã¦ãããªãããªãªããªãããã®ã¤ãã¥ã¼ã¿ãã«ãã¼ã¿ã¢ãã«ã¯ããããæå©ãããææ³ã§ãæé ã«æ²¿ã£ã¦å®æ½ããã°ããç¨åº¦ã®ã¹ãã«ã®ãã©ã¤ããå¸åã§ããããã«çµã¿ç«ã¦ããã¦ããã
以åãDDDï¼ãã¡ã¤ã³é§åéçºï¼ãçµé¨ããæµãã§ããã¤ãã®ãã¨ãå¦ã³ã¾ãã ãã®ä¸ã§DDDã®ç¥é«ãå£éè¦ãã®ã§ããã¤ã¾ãã§ç´¹ä»ã§ããã°ã¨æãã¾ã è¨äºã®ã¿ã¼ã²ãã DDDãå¦ã³å§ãã人 å¤ãªãã¸ã§ã¯ãã»ValueObjectã¨ã¯ãªã«ãããã®çé±ãç¥ããã人 Value Objectã¨ã¯ å¤ãªãã¸ã§ã¯ãã¨ãã¦ã¨ãªãã¯æ¬(éæ¬)ã§ã¯ç´¹ä»ãã¦ãã¾ãã Value Objectã®ç¹å¾´ ç¹å¾´ã¨ãã¦ä»¥ä¸ã®ãããªå 容ãããã¾ã ä¸ææ§ãæããªã è¨æ¸¬ï¼å®éåï¼èª¬æã責åã¨ãã ã¤ãã¥ã¼ã¿ãã«ãªãã¸ã§ã¯ã 交æå¯è½ ãµãã¾ãã«å¯ä½ç¨ããªã ä¸ææ§ãæããªã ãªãã¸ã§ã¯ãæ¯ã« hogehoge_id ã®ãããªä¸ææ§ã表ç¾ããããããã£ãå«ã¾ããä¸ææ§ããªãç¹å¾´ã§ã éã«IDãæã¤ãããªãªãã¸ã§ã¯ãã¯ãEntityãã¨ããã¾ã ãã®ç¹å¾´ã®æå³ããã¨ããã¯ãªãã¸ã§ã¯ããããªããã£ãã©ã¤ã¯ã«æ±ãããã¨ã ã¨èããã
immutable??mutable?? ã¨ãããã¨ã§ãimmutable(ã¤ãã¥ã¼ã¿ãã«:ä¸å¤)ã¨mutable(ãã¥ã¼ã¿ãã«:å¤æ´å¯è½)ãªãªãã¸ã§ã¯ãã®è©±ã§ãã ããããimmutable/mutableã£ã¦ãªãã ããï¼ã¨ããã¨ããããæ¸ãããã¨æãã¾ãã |> immutable(ä¸å¤)ãªãã¸ã§ã¯ãã¨ã¯ ãªãã¸ã§ã¯ã(ã¤ã³ã¹ã¿ã³ã¹)ãã®ãã®ã®ç¶æ ãå¤æ´ã§ããªããã¨ã Javaã«ãããä»£è¡¨æ ¼ã¯Stringã¯ã©ã¹ã§ããäºå®Stringã¯èªåèªèº«ã®ç¶æ ãå¤æ´ããã¡ã½ãããæä¾ãã¦ãã¾ããã â»replaceã¡ã½ãããªããã¯åéããããããã§ãããèªåèªèº«ãå¤åãããã¨ã¯ãªãã¨è¦ãã¦ããã°åããããããã¨ã ä¸å¤ãªãã¸ã§ã¯ãã¨ãã¦ãå¿ è¦ãªæ¡ä»¶ã¯ä¸è¨ã®éãã ãªãã¸ã§ã¯ãã®å é¨ç¶æ ãå¤æ´å¯è½ãªã¡ã½ãããæä¾ããªãã(ã¤ã¾ããgetterã¯ç¨æãã¦ãsetterãããã«æºãããã®ã¯ç¨æããªã)
ãªãªã¼ã¹ãé害æ å ±ãªã©ã®ãµã¼ãã¹ã®ãç¥ãã
ææ°ã®äººæ°ã¨ã³ããªã¼ã®é ä¿¡
å¦çãå®è¡ä¸ã§ã
j次ã®ããã¯ãã¼ã¯
kåã®ããã¯ãã¼ã¯
lãã¨ã§èªã
eã³ã¡ã³ãä¸è¦§ãéã
oãã¼ã¸ãéã
{{#tags}}- {{label}}
{{/tags}}