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9 lines
273 B
Ruby
9 lines
273 B
Ruby
class Category < ApplicationRecord
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has_many :questions
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belongs_to :parent_category, class_name: 'Category', foreign_key: :parent_category_id
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has_many :child_categories, class_name: 'Category', foreign_key: :parent_category_id
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validates :name, presence: true
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end
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