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完全给自己用的 [url]http://api.rubyonrails.org/classes/ActiveModel/Validations/HelperMethods.html[/url] ActiveRecord::QueryMethods ActiveRecord::FinderMethods ActiveRecord::NestedAttributes::ClassMethods ActiveRecord::Observer ActiveRecord::Migration ActiveResource::CustomMethods 关于Query [url]http://guides.rubyonrails.org/active_record_querying.html[/url] where boolean 不用 并列条件搜索 ———————————————————————————————————————————————————————————————————— 官方的association部分 ActiveRecord::Associations::ClassMethods [url]http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html[/url] has_many :through —————————————————————————————————————————————————————————————————————— update_all [url]http://api.rubyonrails.org/classes/ActiveRecord/Relation.html[/url] ————————————————————————————————————————————————————————————————————— generate migration [url]http://api.rubyonrails.org/classes/ActiveRecord/Migration.html[/url] ________________________________________________________________________ form_tag [url]http://api.rubyonrails.org/classes/ActionView/Helpers/FormTagHelper.html[/url]

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