app/models/target_allocation.rb


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class TargetAllocation < ApplicationRecord
  belongs_to :target
  belongs_to :nutrient_profile

  validates :percentage, numericality: { greater_than_or_equal_to: 0, less_than_or_equal_to: 100 }
  validates :nutrient_profile_id, uniqueness: { scope: :target_id }
end