Rails7ã®åºæ¬ãããã¥ã¼ãã¢ãã«ãã³ã³ããã¼ã©ãªã©ããããããã解説 ã¡ã½ãããã¨ã«ä½¿ç¨ã§ãããªãã·ã§ã³ã使ç¨ä¾ãªã©ãå¤ãè¨è¼
å 容 ä¼è¤æ·³ä¸ããã®ããã°ã©ãã³ã°åå¿è æè¿ï¼ãã¨ã©ã¼ãåºã¾ãããã©ãããã°ããã§ããï¼ãããåæ¥ããããã®åºæ¬ã¨æ¥µæ ã¨ããåç»ã®å 容ãèªåãªãã«ã¾ã¨ãããã®ã§ãã ã¨ã¦ãåãããããã¾ã¨ã¾ã£ã¦ãããç¹ã«åå¿è ã«ã¨ã£ã¦ã¯æçãªæ å ±ã ã¨æã£ãã®ã§æåã«èµ·ããã¦ã¿ã¾ããã ã¨ã©ã¼ã§ãã§ãã¯ããé ç® ã¨ã©ã¼ã¡ãã»ã¼ã¸ Comment(#XXXXXX) expected, got String (#XXXXXX)ãã®ãããªãã®ã è±èªãããããªããªã翻訳ãã¦ã§ãã¾ãã¯ä½ããããªãã®ãã¨ã©ã¼ã¡ãã»ã¼ã¸ãè¦ããã¨ã§ã¡ããã¨ç¢ºèªããã ã¨ã©ã¼ã®ã¿ã¤ãç¢ºèª ActiveRecord::AssociationTypeMismatchãã®ãããªãã®ã ãããã§èª¿ã¹ãã¨ãã©ããã£ãå ´åã«ãããã¨ã©ã¼ãªã®ãããããã ã¦ã¼ã¶ã¼ãæä½ããæé ãµã¼ãã¼ã®ãã°ã確èªãã¦ãã©ã®ãããªæä½ãç»é¢é·ç§»ã«ãã£ã¦ã¨ã©ã¼ãçºç
éçºä½æ¥ã«ãããã¯ãã¼ã«ã¯å¿ é ããã°ã©ã ã®åå¼·ãç²ãæ§ã§ããçªç¶ã§ãããRailsã®åå¼·ã®éã«ãããã°ãã¼ã«ä½¿ã£ã¦ãã¾ããï¼ ãããã°ãã¼ã«ã£ã¦ä½ï¼ã¨ããæ¹ãããããããã¾ããããããã°ã©ãã³ã°ã«ã¤ããã®ã®ãããã°ä½æ¥ããµãã¼ããã¦ããããã¼ã«ã®ãã¨ã§ãã¹ãããå®è¡ã¨ãã£ã¦ä¸è¡ãã¨ã«ããã°ã©ã ãå®è¡ãã¦ãã®æã«å®£è¨ããã¦ãããå¤æ°ã®ä¸èº«ãè¦ãªããåä½ã確èªãããã¨ãã§ãã¾ãã éçºä½æ¥ããã¦ããã¨ãããããï¼ï¼ï¼ï¼ï¼ãªãã§ãã®å¤æ°nullãªã®ï¼ï¼ï¼ããªãã¦ãã¨ãå¤ããã¨æãã¾ããããããªã¨ãã«ãããã°ãã¼ã«ãå°å ¥ãã¦ã¿ãã¨ãããã°ä½æ¥ãæãã¾ãã ããªã³ããããã°ã¨ãããRubyã§ããã½ã¼ã¹ã³ã¼ãã«putsãprintãªã©ãåãè¾¼ãã§ãå®è¡ãã¦ã¿ãã¨ããæ¹æ³ãããã¾ããã ããããããã§ãä»åã¯Railsã®éçºæã«ç§ãã¡ã使ã£ã¦ããbyebugï¼ãã¤ãã°ï¼ãç´¹ä»ãã¾ãã byebug(ã
Fetching mysql2 0.5.2 Installing mysql2 0.5.2 with native extensions Gem::Ext::BuildError: ERROR: Failed to build gem native extension. current directory: /Users/name/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/mysql2-0.5.2/ext/mysql2 /Users/name/.rbenv/versions/2.5.3/bin/ruby -r ./siteconf20181128-2670-lgcxlu.rb extconf.rb checking for rb_absint_size()... yes checking for rb_absint_singlebit_p
Railsã®ä»çµã¿ãä½ç³»çã«å¦ã¹ã大åã³ã³ãã³ã Rails Guides ã«åºã¥ãã1,600ãã¼ã¸è¶ ãã®å¤§åãªãã¡ã¬ã³ã¹ã§ãã ãããã¯ãéçºã«å½¹ç«ã¤å®è·µçãªç¥èãæºè¼ Railsãã¥ã¼ããªã¢ã«ãå®èµ°ãããããã¯ãéçºä¸ã®äººã«æé©ã§ãã å ¨ææ¤ç´¢ããã¼ã¸ã§ã³æ¯ã®æ¤ç´¢ã«ãå¯¾å¿ Proãã©ã³ã§ã¯ãããã«å¹ççãªæ´»ç¨ããµãã¼ããã¾ãã ãã®ã¢ã¤ã³ã³ãä»ãã¦ããã¬ã¤ãã¯ç¾å¨ä½æ¥ä¸ (WIP: Work In Progress) ã§ããä½æ¥ä¸ã®ã¬ã¤ãã¯ãããªãã«æç¨ã§ã¯ããã¾ãããä¸å®å ¨ãªæ å ±ãã¨ã©ã¼ãå«ã¾ãã¦ããå¯è½æ§ãããã¾ãã ã¯ããã« Rails ãã¯ãããã Railsã®ã¤ã³ã¹ãã¼ã«æ¹æ³ã¨æåã®Railsã¢ããªã±ã¼ã·ã§ã³ã®ä½æã«å¿ è¦ãªãã¹ã¦ã解説ãã¾ãã Dev Containerã§ã®éçºã¬ã¤ã VS Codeã¨Dev Containerã使ã£ã¦Railsã¢ããªã±ã¼ã·ã§ã³ã®éçºãè¡ãæ¹
Help us understand the problem. What is going on with this article? Rails3.2ããRails4.2ã«ä¸ãããActiveRecordãé ããªã£ãã®ã§ãã©ããã£ã¦èª¿æ»ãã¦ãã©ã®ããã«å¯¾å¦ããããèªã£ã¦ã¿ããã ã¨ã¦ãé·ãã®ã§ããã«ã人ã¯æåã¨æå¾ã ãèªãã°ããã§ãã TL;DR ç°å¢: Ruby 2.1.5 ARãªãã¸ã§ã¯ãã大éã«(ãã£ãã750kããã)loadãããããå¦ç 3.2ç³»ã§ã®å®è¡æéã¯ç´480secã 4.2ç³»ã§ã¯ç´2900sec ç´6åã®æ§è½å£å åå : preloadã§æ§è½å£åãã¦ã CollectionProxyã®çæå¨ãã§é ããªã£ã¦ã Rails4ããARãªãã¸ã§ã¯ãã®1attributeæ¯ã«Objectçæããã®ã§é ã GCã®æéãå¢ãã 調æ»æ¹æ³: Githubã®commitãIssueã
ActiveRecordã«ãããã¢ãã«ã®ãé¢é£ãã¨ã³ã¼ã«ããã¯ã®ä½¿ãæ¹ï¼éçºç¾å ´ã§ã¡ããã¨ä½¿ããRails 4å ¥éï¼6ï¼ï¼1/3 ãã¼ã¸ï¼ ã¨ã³ã¿ã¼ãã©ã¤ãºé åã§ã®æ¡ç¨ãå¢ãã¦ããRuby on Railsã使ã£ã¦Webã¢ããªã±ã¼ã·ã§ã³ãä½ãããã®å ¥éé£è¼ãææ°çã®4ã«å¯¾å¿ãã¦ãã¾ããä»åã¯ãActiveRecordã«ãããã¢ãã«ãªãã¸ã§ã¯ãå士ã®ã¤ãªããã表ããé¢é£ãã¨ã¤ãã³ããçºçããéã«å®è¡ãããå¦çãæå®ãã¦ãããã³ã¼ã«ããã¯ããªã©ã«ã¤ãã¦ã
ã¤ã³ãã©ã¹ãã©ã¯ãã£ã¼é¨ã®æç°ï¼@mirakuiï¼ã§ãã Rails ã® OR ãããã¼ã§ãã ActiveRecord ã§ãããã¿ãªããã©ã®ããã«éç¨ãã¦ãã¾ããï¼ ActiveRecord ã使ãã¨ã SQL ãç´æ¥æ±ããã¨ãªããæ½è±¡åããã表ç¾ã§ RDB ã«ã¢ã¯ã»ã¹ã§ããã®ã§ãã¢ããªã±ã¼ã·ã§ã³ã®éçºå¹çã¨ãã観ç¹ã§ã¯ã¡ãªããã大ããã§ãã ä¸æ¹ã§ã ActiveRecord ãé§ä½¿ããã¦ããã¢ããªã±ã¼ã·ã§ã³ããµã¼ãã«é ç½®ãã¦ãããã¯ã·ã§ã³ã¨ãã¦éç¨ããç«å ´ããããã¨ãããã¤ãã®åé¡ã«çªãå½ããã¾ãã ã¾ãã¯ã¯ãã¯ãããæ¬ä½ã¢ããªã±ã¼ã·ã§ã³ã«ããããææ°ã® rake stats ãã覧ãã ããã +----------------------+-------+-------+---------+---------+-----+-------+ | Name | Lines | LOC
ã©ã³ãã³ã°
ã©ã³ãã³ã°
ã©ã³ãã³ã°
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}}