Ruby on Rails/Âè5²óÊÙ¶¯²ñ - ActiveRecord¡§¡§Associations http://www.ark-web.jp/sandbox/wiki/76.html
Ruby on Rails/Âè5²óÊÙ¶¯²ñ - ActiveRecord¡§¡§Associations
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- Ruby on Rails/Âè3²óÊÙ¶¯²ñ - Components¡§ Pursuing the Pipe Dream/Æ°²è/¤½¤Î1
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- Ruby on Rails/Âè4²óÊÙ¶¯²ñ - Active Record Reference Documentation
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- Ruby on Rails/Âè5²óÊÙ¶¯²ñ - ActiveRecord¡§¡§Associations
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Module ActiveRecord::Associations::ClassMethods
http://railsapi.masuidrive.jp/module/ActiveRecord%3A%3AAssociations%3A%3AClassMethods
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- Project belongs to portfolio.
- Project has one project manager.
- Project has many milestons.
- Project has and belongs to many categories;
has one, belong_to †
- 1ÂÐ1¤Î¥ê¥ì¡¼¥·¥ç¥ó¤Î»þ¤Ï¡¢³°Éô¥¡¼¤ò¤â¤Ã¤Æ¤¤¤ëÊý¤¬ belong_to¤Ç¡¢°ìÊý¤Ïhas_one¡£
- has_one¤Èbelongs_to¤ÇÄɲ䵤ì¤ë¥¯¥é¥¹¥á¥½¥Ã¥É¤ÏƱ¤¸¤â¤Î
portfolio(belong_to)
- Project#portfolio
- Project#portfolio=(portfolio)
- Project#portfolio.nil?
project_manager(has_one)
- Project#project_manager
- Project#project_manager=(project_manager)
- Project#project_manager.nil?,
has_many †
- Project#milestones.empty?,
- Project#milestones.size
- Project#milestones
- Project#milestones<<(milestone)
- Project#milestones.delete(milestone)
- Project#milestones.find(milestone_id)
- Project#milestones.find_all(conditions)
- Project#milestones.build
- Project#milestones.create
has_and_belongs_to_many †
- Project#categories.empty?
- Project#categories.size
- Project#categories
- Project#categories<<(category1)
- Project#categories.delete(category1)
tag: Ruby on Rails, ÊÙ¶¯²ñ