在Rails 3中,=和assign_attributes之间有一些区别。 =是一个赋值操作符,用于将一个值赋给变量或实例变量。在 Ruby on Rails 中,它也可以用于将值赋给模型的属性。例如: 代码语言:ruby 复制 user.name="John" 上述代码将把字符串 "John" 赋给user对象的name属性。 assign_attributes是一个模型实
使用assign_attributes方法:assign_attributes方法允许您一次性为对象分配多个属性值。例如: 代码语言:ruby 复制 user = User.new user.assign_attributes(name: 'John', age: 25, email: 'john@example.com') 使用attributes=方法:attributes=方法允许您一次性为对象分配多个属性值。例如: 代码语言:ruby 复制 user...
If you want to update the status attribute, you should assign it separately. @user.status = 'active' save allen - August 14, 2008 4 thanks Calls attribute setter for each key/value in the hash This is a convenience to set multiple attributes at the same time. It calls the "setter" ...
Rails升级:assign_attributes的参数数量错误(2表示1) 嗨我已经从rails 3.2.12升级到4.0.0大多数人认为现在工作正常,但是我收到了这个错误: 在这种情况下是什么问题? rubyruby-on-railsruby-on-rails-4 Fel*_*lix 2015 04-30 0 推荐指数 1 解决办法 ...
我没有找到一个优雅的解决方案，而是在调用.assign_attributes之前为每个新的子对象手动创建一个新的子...
user.attributes = {name:"Rob",age:12} user.assign_attributes {name:"Rob",age:12} These are equivalent user.update(name: "Rob") This method used to be calledupdate_attributesin Rails 3. It changes the attributes of the model, checks the validations, and updates the record in the databa...
item.attributes={name:'John'}# Merges attributes in. Doesn't save.item.assign_attributes name:'John'# Same as above See: [AttributeAssignment]( Validations item.valid?item.invalid? Calculations Person.countPerson.count(:age)# counts non-nil's ...
Reverts #52892 #49678 's behaviour I was trying to partially restore is a breaking change, and thus the reverted commit is too. We shouldn't need to crawl associations to assign attributes. Correct...
Mass assignemet是個Rails專屬,因為太方便而造成的安全性議題。ActiveRecord物件在新建或修改時,可以直接傳入一個Hash來設定屬性(這功能叫做Mass assignment): defcreateparams[:user]#=> {:name => “ow3ned”, :is_admin => true}@user= User.create(params[:user])enddefupdate@user= User.update_attributes...
Simple mutation methodsto encapsulate updating and saving a handful of attributes in the database. Access wrappersto hide internal model information (e.g., afull_namemethod that combinesfirst_nameandlast_namefields in the database). Sophisticated queriesthat are more complex than a simplefind; gen...