irb(main):010:0> 另一种方式和用crate方法创建及保存对象很类似,叫做update_attributes,将属性设置和保存操作整合为一步。在update_attributes方法的参数中将要修改的字段名和值传入。 1 2 3 4 5 6 7 8 9 irb(main):016:0> subject4.update_attributes(:name=>"
first.save 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.update(12,:name=>"Barney",:email=>"barney@bedrock.com")...
问Ruby on Rails回形针update_attributes不工作EN查看可用ruby版本 [root@h202 ruby]# rvm list known ...
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...
product.update_attributes!(:flag=>false) end end end # db/migrate/20100515121110_add_fuzz_to_product.rb classAddFuzzToProduct < ActiveRecord::Migration classProduct < ActiveRecord::Base end defchange add_column:products,:fuzz,:string Product.reset_column_information ...
update_attributes(user_params) user_serilized = UserSerializer.new( current_api_v1_user ) render json: { data: user_serilized, is_success: true, status: 'success', } else render json: { error: "Failed to Update", is_success: false }, status: 422 end end With the above, you ...
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...
def update @user = User.find params[:id] respond_to do |format| if @user.update_attributes(params[:user]) format.html { redirect_to(@user, :notice => 'User was successfully updated.') } format.json { respond_with_bip(@user) } else format.html { render :action => "edit" } ...
Attributes should be immutable throughout the object’s life cycle. Equality is determined by the object’s attributes. In our example, I’ll create anEntryStatusvalue object to abstractEntry#status_weatherandEntry#status_landformattributes to their own class, which looks something like this: ...
topic.update!(status: :archived) topic.status_previously_changed?(from: "active", to: "archived") # => true *George Claghorn* * Raise FrozenError when trying to write attributes that aren't backed by the database on an object that is frozen: ...