WebbIn general, the steps for creating a one-to-many association between two existing model classes is as follows. Step 1Add a Foreign Key Column to the Child’s DB Table. This step creates and runs a new database migration that updates the database schema so as to add a foreign keycolumn to database table of the child model class. Webbhas_many :through has_one :through has_and_belongs_to_many 关联使用宏式调用实现，用声明的形式为模型添加功能。 例如，声明一个模型属于（ belongs_to ）另一个模 …
Rails has_many through query, с двумя ссылками aka, …
WebbJim Hogan 2016-07-18 22:56:53 282 2 ruby-on-rails/ ruby-on-rails-4 Question I'm trying to display all of the comments on all of a user's posts in a has_many_through association. Webbhas_many :categorizations has_many :posts, through: :categorizations Если вы забываете об этом, active record предположим что post это колонка Category потому что вы ему никогда не говорите что это отношение today you are a fountain pen
#323 has_many :through => belongs_to_association bug - Ruby on Rails …
WebbMy name is 𝗭𝗮𝗸𝗮𝗿𝗶𝘆𝗮 and I’m a web/mobile-focused full-stack developer accustomed to working with the following technologies: JavaScript, … WebbA has_many :through association is often used to set up a many-to-many connection with another model. This association indicates that the declaring model can be matched with zero or more instances of another model by proceeding through a third model. Action Mailer BasicsThis guide provides you with all you need to get started in … Active Record BasicsThis guide is an introduction to Active Record.After … Ruby on Rails 6.1 Release NotesHighlights in Rails 6.1: Per-database Connection … Active Job BasicsThis guide provides you with all you need to get started in … Rails Routing from the Outside InThis guide covers the user-facing features of Rails … Configuring Rails ApplicationsThis guide covers the configuration and initialization … Active Record Query InterfaceThis guide covers different ways to retrieve data … Layouts and Rendering in RailsThis guide covers the basic layout features of … WebbRails 3, has_many :through и оператор << Конвертирую приложение в Rails 3. Раненько в этот недостающий синтаксический сахар. class Group < ActiveRecord::Base has_many :memberships has_many :users, :through => :memberships end class Membership < ActiveRecord::Base belongs_to :group belongs_to :user end class User <... today your love tomorrow the world chords