使用update_attribute() order = Order.find(123) order.update_attribute(:name,"Barney") order = Order.find(321) order.update_attributes(:name=>"Barney", :email=>"barney@bedrock.com") 使用更快捷的update() order = Order.
问包含update_attribute的Rails rake任务在“字段列表”中出现Mysql2::Error: Unknown列“NaN”EN基于上面...
1. .changed? and <attribute>_changed?这两个方法是用于判断记录或属性是否被修改，card = Card.firstcard.name # => "克洛泽"card.changed? # => falsecard.name_changed? # => falsecard.name = "Klose"card.changed? # => truecard.name_changed? #=> true 如上面代码所示，使用Act...
before_filter:load_user,:only=> [:show,:edit,:update,:destroy] before_filter:new_user,:only=>:new filter_access_to:all filter_access_to [:show,:edit,:update],:attribute_check=>true #……… end 这里涉及到两个名词:粗粒度与细粒度。 粗粒度...
You can automatically update the index whenever the record changes, by including the Elasticsearch::Model::Callbacks module in your model:class Article include Elasticsearch::Model include Elasticsearch::Model::Callbacks end Article.first.update_attribute :title, 'Updated!' Article.search('*').map {...
For example: update_attribute doesn't perform validations checks, to perform validations when updating use update_attributes. All methods injected by the AlgoliaSearch module are prefixed by algolia_ and aliased to the associated short names if they aren't already defined. Contact.algolia_reindex!
A Form object is responsible for representing a form in your application. So each input field can be treated as an attribute in the class. It can validate that those attributes meet some validation rules, and it can pass the “clean” data to where it needs to go (e.g., your database...
Radiant主要由三部分组成：页面，代码片断（比如包含PHP）和布局，这三个部分共同创建了一个系统核心，维...
创建ruby 脚本过程中的第一个任务是创建到数据库的连接。执行以下步骤: 查询数据 您将在本节中使用以下命令: 要创建一个简单查询并显示结果,执行以下步骤。 绑定变量 绑定变量提高了代码可重用性,消除了 SQL 注入攻击的风险。您将在本节中使用以下命令: ...
attribute name should be. *Filipe Sabella* * Deprecate marshalling load from legacy attributes format. *Ryuta Kamizono* * `*_previously_changed?` accepts `:from` and `:to` keyword arguments like `*_changed?`. topic.update!(status: :archived) ...