app/models/fertilizer_product.rb


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class FertilizerProduct < ApplicationRecord
  has_many :fertilizer_compositions, dependent: :destroy
  has_many :fertilizer_components, through: :fertilizer_compositions

  validates :name, presence: true, uniqueness: true
  validates :purity, numericality: { greater_than: 0, less_than_or_equal_to: 100 }
end