17 lines
391 B
Ruby
17 lines
391 B
Ruby
class Friendship < ActiveRecord::Base
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belongs_to :user
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belongs_to :friend, class_name: 'User'
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validates_uniqueness_of :friend_id, :scope => :user_id
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validate :disallow_self_reference
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def disallow_self_reference
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if friend_id == user_id
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errors.add(:friend_id, 'cannot refer back to self')
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end
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end
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def error_messages
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errors.full_messages.join(', ')
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end
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end
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