38 lines
584 B
Ruby
38 lines
584 B
Ruby
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class Ingredient < ApplicationRecord
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self.abstract_class = true
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class << self
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def find_by_ingredient_id(ingredient_id)
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case ingredient_id
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when /^R(\d+)$/
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Recipe.find($1)
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when /^F(\d+)$/
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Food.find($1)
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else
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raise ActiveRecord::RecordNotFound
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end
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end
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end
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def ingredient_id
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case self
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when Recipe
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"R#{id}"
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when Food
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"F#{id}"
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else
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raise 'Unknown ingredient'
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end
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end
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def nutrition_errors
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[]
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end
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def density?
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!self.density.nil?
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end
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end
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