Ruby on Rails - classic associations in ruby on rails - ruby on rails tutorial - rails guides - rails tutorial - ruby rails

Mongoid allows the classic ActiveRecord associations:

One-to-one: has_one / belongs_to
One-to-many: has_many / belongs_to
Many-to-many: has_and_belongs_to_many

To add an association (lets say the User has_many posts), you can add this to your User model file :

has_many :posts

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This to our Post model file:

belongs_to :user

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This will add a user_id field in our Post model, add a user method to our Post class, and add a posts method to our User class.

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Ruby on Rails - classic associations in ruby on rails - ruby on rails tutorial - rails guides - rails tutorial - ruby rails

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