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Great! Looking at the request/response cycle, we need four parts to build the travel app: models, controllers, routes, and views.

Let’s begin by creating the models.

Generate a model named Tag.

Generate another model named Destination.

In app/models/tag.rb add a has_many method, like this:

class Tag < ActiveRecord::Base 
  has_many :destinations 
end

In app/models/destination.rb, add a belongs_to method:

belongs_to :tag

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