How to convert ActiveRecord results into an array of hashes
I have an ActiveRecord result of a find operation: tasks_records = TaskStoreStatus.find( :all, :select => "task_id, store_name, store_region", :conditions => ["task_status = ? and store_id = ?", "f", store_id] ) Now I want to convert this results into an array of hashes like this: [0] -> { :task_d => 10, :store_name=> "Koramanagala", :store_region=> "India" } [1] -> { :task_d => 10, :store_name=>
Creating multiple associations with the same table - Space Vatican
Rails makes setting up your associations dead easy and very concise. There’s a whole bunch of options that can be set however as long as you are following Rails’ conventions you very rarely need to use them. If you’re new to rails you might not even know they exists and get away with it 99% of the time. One case where you do is when you’ve got more than one association pointing at the same table.
Combine two ActiveRecord::Relation objects
Suppose I have the following two objects: first_name_relation = User.where(:first_name => 'Tobias') # ActiveRecord::Relation last_name_relation = User.where(:last_name => 'Fünke') # ActiveRecord::Relation is it possible to combine the two relations to produce one ActiveRecord::Relation object containing both conditions? Note: I'm aware that I can chain the wheres to get this behavior, what I'm rea
Active Record ã®é–¢é€£ä»˜ã‘ - Railsガイド
1 関連付ã‘ã®æ¦‚è¦ Active Recordã®ã€Œé–¢é€£ä»˜ã‘（アソシエーション: association）ã€ã‚’使ã†ã¨ã€ãƒ¢ãƒ‡ãƒ«é–“ã®ãƒªãƒ¬ãƒ¼ã‚·ãƒ§ãƒ³ã‚·ãƒƒãƒ—を定義ã§ãã¾ã™ã€‚関連付ã‘ã¯ç‰¹æ®Šãªãƒžã‚¯ãƒã‚¹ã‚¿ã‚¤ãƒ«ã®å‘¼ã³å‡ºã—ã¨ã—ã¦å®Ÿè£…ã•ã‚Œã¦ãŠã‚Šã€ãƒ¢ãƒ‡ãƒ«åŒå£«ã‚’ã©ã®ã‚ˆã†ã«é–¢é€£ã•ã›ã‚‹ã‹ã‚’Railsã«æ‰‹è»½ã«æŒ‡å®šã§ãã¾ã™ã€‚ã“ã‚Œã«ã‚ˆã‚Šã€ãƒ‡ãƒ¼ã‚¿ã®ç®¡ç†ãŒã‚ˆã‚ŠåŠ¹çŽ‡çš„ã«ãªã‚Šã€ä¸€èˆ¬çš„ãªãƒ‡ãƒ¼ã‚¿æ“作ãŒã‚·ãƒ³ãƒ—ルã§èªã¿ã‚„ã™ããªã‚Šã¾ã™ã€‚ マクãƒã‚¹ã‚¿ã‚¤ãƒ«ã®å‘¼ã³å‡ºã—ã¯ã€å®Ÿè¡Œæ™‚ã«ä»–ã®ãƒ¡ã‚½ãƒƒãƒ‰ã‚’å‹•çš„ã«ç”Ÿæˆãƒ»å¤‰æ›´ã™ã‚‹ãƒ¡ã‚½ãƒƒãƒ‰ã§ã‚ã‚Šã€Railsã§ã®ãƒ¢ãƒ‡ãƒ«ã®é–¢é€£ä»˜ã‘ã®å®šç¾©ãªã©ã€ç°¡æ½”ã§è¡¨ç¾åŠ›è±Šã‹ãªæ©Ÿèƒ½ã®å®£è¨€ã‚’å¯èƒ½ã«ã—ã¾ã™ã€‚ãŸã¨ãˆã°has_many :commentsã®ã‚ˆã†ã«è¨˜è¿°ã—ã¾ã™ã€‚ 関連付ã‘ã‚’è¨å®šã™ã‚‹ã¨ã€RailsãŒ2ã¤ã®ãƒ¢ãƒ‡ãƒ«ã®ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹åŒå£«ã®ä¸»ã‚ー（primary key）ã¨å¤–部ã‚ー（foreign key）ã®ãƒªãƒ¬ãƒ¼ã‚·ãƒ§ãƒ³ã‚·ãƒƒãƒ—や管ç†ã‚’支æ´ã—ã€ãƒ‡ãƒ¼ã‚¿
ActiveRecordã®é–¢é€£ã®ã™ã¹ã¦ ー StoneDot ã® Ruby on Rails 講座
今回㯠ActiveRecord ã¤ã„ã¦èª¬æ˜Žã—ã¦ã„ããŸã„ã¨æ€ã„ã¾ã™ã€‚ A Guide to Active Record Associationsã¨ã€ Active Record Query Interface ã‚’å‚考ã«ã—ã¾ã—ãŸã€‚ ã¾ãŸã€å›³ã‚‚ã“ã¡ã‚‰ã‹ã‚‰æ‹å€Ÿã•ã›ã¦ã„ãŸã ãã¾ã—ãŸã€‚ Rails ã§ã®é–¢é€£ Rails ã§ã¯é–¢é€£ã‚’è¨å®šã™ã‚‹ã“ã¨ã§ãƒ¢ãƒ‡ãƒ«ã‚ªãƒ–ジェクトを接続ã—æ§‹é€ ã‚’ä½œã‚‹ã“ã¨ãŒå‡ºæ¥ã¾ã™ã€‚ 関連ã®è¨å®šã¯ãƒ¢ãƒ‡ãƒ«ã‚¯ãƒ©ã‚¹ã«å®£è¨€çš„ã«ãƒ¡ã‚½ãƒƒãƒ‰ã‚’書ã入れるã“ã¨ã«ã‚ˆã£ã¦è¡Œã„ã¾ã™ã€‚ 使ãˆã‚‹ãƒ¡ã‚½ãƒƒãƒ‰ã¨ã—ã¦ã¯å¤§ãã分ã‘ã¦ä»¥ä¸‹ã®6種類ãŒã‚ã‚Šã¾ã™ã€‚ belongs_to has_one has_many has_many :through has_one :through has_and_belongs_to_many ã“ã“ã‹ã‚‰ã¯ã“れらã®ãƒ¡ã‚½ãƒƒãƒ‰ã‚’ã©ã®ã‚ˆã†ã«ä½¿ã†ã®ã‹ã‚’説明ã—ã¦ã„ããŸã„ã¨æ€ã„ã¾ã™ã€‚ 一対一関連 一対一関
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悪ã„上å¸ã‚’æŒã¤ã¨å®¶æ—全員ã¨ã®é–¢ä¿‚ã«ã‚‚悪影響をåŠã¼ã™ã¨ã®ç ”究çµæžœ 会社勤ã‚ã§ã‚ã‚Œã°ã€ã»ã¨ã‚“ã©ã®äººã«ã¯ä¸Šå¸ãŒã„ã‚‹ã‚ã‘ã§ã™ãŒã€é¢å€’見ã®è‰¯ã„上å¸ã‚‚ã„ã‚Œã°ã€ã‚¦ãƒžã®åˆã‚ãªã„厳ã—ã„上å¸ã‚‚ã„ã¾ã™ã€‚ 毎日を顔をåˆã‚ã›ã‚‹ç›¸æ‰‹ã ã‘ã«å½±éŸ¿ãŒå¤§ãã„ã®ã¯å½“然ã§ã™ãŒã€å®Ÿã¯æ‚ªã„上å¸ã‚’æŒã¤ã¨å®¶æ—関係ã«ã‚‚大ããªå½±éŸ¿ã‚’åŠã¼ã™ã“ã¨ãŒã€ãƒ•ãƒ©ãƒ³ã‚½ãƒ¯ãƒ»ãƒ©ãƒ–レー大å¦ï¼ˆãƒ•ãƒ©ãƒ³ã‚¹ï¼‰ã®ç ”究ã§ã‚ã‹ã£ãŸãã†ã§ã™ã€‚ è·å ´ã§ã®å¿ƒç†çŠ¶æ…‹ãŒã€å¥åº·ã‚„幸ç¦åº¦ã«é–¢ä¿‚ã™ã‚‹ã“ã¨ãŒã‚ã‹ã£ãŸä»–ã€æ‚ªã„上å¸ã‚’æŒã¤ã¨è‡ªåˆ†ã ã‘ã§ãªãã€å®¶æ—全員ã¨ã®ã¤ãªãŒã‚Šã«ã‚‚影響をåŠã¼ã™ãã†ã§ã™ã€‚ ç ”ç©¶ã§ã¯å¤§å°æ§˜ã€…ãªä¼æ¥ã«å‹¤ã‚ã‚‹1100人以上を対象ã«ã€è·å ´ç’°å¢ƒã«ã¤ã„ã¦ã‚„ç·åˆçš„ãªå¥åº·ã«ã¤ã„ã¦ã®ãƒªã‚µãƒ¼ãƒãŒè¡Œã‚ã‚Œã¾ã—ãŸã€‚ 質å•ã¯ã€ä¸Šå¸ãŒä½•ã‹ã‚’決定ã™ã‚‹ã¨ãã«ã€è‡ªåˆ†ãŒã©ã†é–¢ã‚ã‚Šã©ã‚“ãªé¢¨ã«æ„Ÿã˜ãŸã‹ãªã©ã‚‚å«ã¾ã‚Œã¦ã„ã‚‹ã¨ã®ã“ã¨ã§ã™ã€‚ 「上å¸ã¯ã€ä»•æ§˜å¤‰æ›´ã™ã‚‹éš›ã«è‡ªåˆ†ã®æ„見をèžã„ã¦ãれる〠「上å¸ã¯ã€è‡ªåˆ†ã®ä»•äº‹é‡
Alloy: A Lightweight Object Modelling Notation - 言語ゲーãƒ
http://sdg.csail.mit.edu/pubs/2002/alloy-journal.pdf Alloy ãŒé›£ã—ã見ãˆã‚‹ã®ã¯ã‚ªãƒ–ジェクト指å‘ã£ã½ã„文法ã¨ãã®æ„味ã«éš”ãŸã‚ŠãŒã‚ã‚‹ã‹ã‚‰ã‹ã‚‚知れã¾ã›ã‚“。Alloy ã®ã‚¢ã‚¤ãƒ‡ã‚¢ãŒæ›¸ã‹ã‚Œã¦ã‚ã‚‹ã“ã®è«–文をèªã‚“ã§æ€ã„ã¾ã—ãŸã€‚ã“ã®è«–æ–‡ã®ãŠã™ã™ã‚èªã¿æ–¹ã€‚ 1. 導入をèªã‚€ 記å·ãŒè‹¦æ‰‹ã˜ã‚ƒãªã‘れ㰠3.1, 3.2, 3.3 カーãƒãƒ«è¨€èªžã«ã¤ã„ã¦èªã‚€ 4. 5. 6. ä»–ã®è¨€èªžã¨ã®æ¯”較をèªã‚€ 2. Example ã¨æ®‹ã‚Šã‚’èªã‚€ã€‚ é ã‹ã‚‰é †ã«èªã‚€ã¨ã‹ãªã‚Šæ„味ä¸æ˜Žã§ã—ãŸã€‚特㫠3 ç« ã®ã¯ã˜ã‚ã®ã‚«ãƒ¼ãƒãƒ«è¨€èªžã®è©±ãŒé¢ç™½ã„ã®ã§æ›¸ãã¾ã™ã€‚ Alloy ã®è¨è¨ˆã¯äºŒæ®µæ§‹ãˆã«ãªã£ã¦ã„ã¾ã™ã€‚å˜ç´”ã§æ©Ÿèƒ½ã®å°‘ãªã„カーãƒãƒ«è¨€èªžã‚’オブジェクト指å‘風ã®æ–‡æ³•ã§åŒ…む形ã«ãªã£ã¦ã„ã¾ã™ã€‚文法ã¯ä¸€è¦‹ Java ã®ã‚¯ãƒ©ã‚¹å®šç¾©ã£ã½ãã¦è¦ªã—ã¿ã‚„ã™ã„ã§ã™ãŒã€ç´°ã‹ã„所ã§å…¨ç„¶é•ã†ã®ã§ã‚«ãƒ¼ãƒãƒ«è¨€èªžã®æ€§è³ª
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Multiple belongs_to to the same table
Rails/Arel: Selecting all records as an ActiveRecord::Relation
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