rails dependent

相關問題 & 資訊整理

rails dependent

In Rails, an association is a connection between two Active Record models. ... class Author < ApplicationRecord has_many :books, dependent: :destroy end ... ,class Customer < ActiveRecord::Base has_many :orders, dependent: :destroy end class Order < ActiveRecord::Base belongs_to :customer end. 改寫成這樣後, ... ,Note that these are implemented as callbacks, and Rails executes callbacks in order. Therefore, other similar callbacks may affect the :dependent behavior, and ... ,2015年4月10日 — Add cascading delete to your EmpGroup model: class EmpGroup < ActiveRecord::Base has_many :emp_group_members, :dependent ... ,Note that :dependent is implemented using Rails' callback system, which works by processing callbacks in order. Therefore, other callbacks declared either ... ,No. You should remove :dependent => :destroy and add after_destroy callback where you can write any logic you want. class Worker < ActiveRecord::Base ... ,2018年7月5日 — You don't want to use :dependent => :destroy here, but rather the before_destroy callback like so: #leash.rb before_destroy :destroy_dog def ... ,Docs are available here. Looks like the following options are supported: :destroy - causes all the associated objects to also be destroyed. :delete_all - causes all ... ,dependent. 可以設定當物件刪除時,怎麼處理依賴它的資料,例如: class Event < ApplicationRecord has_many :attendees, :dependent => :destroy end. ,2018年8月27日 — In Ruby on Rails, objects are saved through the ActiveRecord database management system. Classes of objects are represented by individual ...

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rails dependent 相關參考資料
Active Record Associations — Ruby on Rails Guides

In Rails, an association is a connection between two Active Record models. ... class Author &lt; ApplicationRecord has_many :books, dependent: :destroy end&nbsp;...

https://guides.rubyonrails.org

Active Record 關聯— Ruby on Rails 指南

class Customer &lt; ActiveRecord::Base has_many :orders, dependent: :destroy end class Order &lt; ActiveRecord::Base belongs_to :customer end. 改寫成這樣後,&nbsp;...

https://rails.ruby.tw

has_many (ActiveRecord::Associations::ClassMethods ...

Note that these are implemented as callbacks, and Rails executes callbacks in order. Therefore, other similar callbacks may affect the :dependent behavior, and&nbsp;...

https://apidock.com

How to use dependent: :destroy in rails? - Stack Overflow

2015年4月10日 — Add cascading delete to your EmpGroup model: class EmpGroup &lt; ActiveRecord::Base has_many :emp_group_members, :dependent&nbsp;...

https://stackoverflow.com

Module ActiveRecord::Associations::ClassMethods - Rails API

Note that :dependent is implemented using Rails&#39; callback system, which works by processing callbacks in order. Therefore, other callbacks declared either&nbsp;...

https://api.rubyonrails.org

Rails - AciveRecord use :dependent =&gt; :destroy on condition ...

No. You should remove :dependent =&gt; :destroy and add after_destroy callback where you can write any logic you want. class Worker &lt; ActiveRecord::Base&nbsp;...

https://stackoverflow.com

Rails :dependent =&gt; destroy with conditions - Stack Overflow

2018年7月5日 — You don&#39;t want to use :dependent =&gt; :destroy here, but rather the before_destroy callback like so: #leash.rb before_destroy :destroy_dog def&nbsp;...

https://stackoverflow.com

Rails dependent which options are possible? - Stack Overflow

Docs are available here. Looks like the following options are supported: :destroy - causes all the associated objects to also be destroyed. :delete_all - causes all&nbsp;...

https://stackoverflow.com

Ruby on Rails 實戰聖經| ActiveRecord - 資料表關聯

dependent. 可以設定當物件刪除時,怎麼處理依賴它的資料,例如: class Event &lt; ApplicationRecord has_many :attendees, :dependent =&gt; :destroy end.

https://ihower.tw

The ActiveRecord :dependent Option | by Benjamin Krigel ...

2018年8月27日 — In Ruby on Rails, objects are saved through the ActiveRecord database management system. Classes of objects are represented by individual&nbsp;...

https://blog.techatpower.com