WebMay 24, 2024 · Polymorphism in Ruby on Rails. Polymorphism works well in Ruby on Rails as an Active Record association. If models essentially do the same thing, we can turn … WebDec 19, 2014 · rails g model Comment commentable:references {polymorphic} rails auto creates the compound index for lookup as part of the migration: t.references :commentable, polymorphic: true. This works in Rails 5 and probably goes back to rails 4.

An Introduction to Polymorphism in Ruby on Rails

Web如果注解需要与多个模型关联，我们称之为polymorphic association。 你可以看看 has_many_polymorphs 插件。 我假设你使用的是rails 3，你可以尝试以下操作： 您可以在 lib/commentable.rb 文件夹中定义模块，如下所示： WebDec 27, 2006 · web. rails. The latest big ActiveRecord feature to Rails has been polymorphic associations. Not very clear at first, I found out they’re easier to understand with a couple examples. A common one: class Person < ActiveRecord::Base has_one :address, :as => :addressable end class Company < ActiveRecord::Base has_one :address, :as => … ray guys cause of death

An Introduction to Polymorphic Associations in Rails

WebSep 11, 2024 · In this Rails tutorial, we'll take a look at how to use polymorphic associations to create reusable "belongs_to" models.Get more content like this at https:/... WebThe major thing to note here is that with has-many-through associations, Rails uses the name of the association in the through table to determine which foreign key and table name to reach out to. If it’s named anything irregular, you’ll use the :source option to specify which association actually points where we’d like to go. You can think of :source as being just … ray guy statistics