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class NutrientMeasurement < ApplicationRecord
NUTRIENT_FIELDS = %i[
nno3 p k ca mg s na cl si fe zn b mn cu mo nnh4
].freeze
validates :measured_on, presence: true
validates :measured_on, uniqueness: true
def self.data_series_for(*nutrients)
nutrients.map do |formula|
{ name: formula, data: self.order(:measured_on).pluck(:measured_on, formula) }
end
end
def self.nutrient_fields
NUTRIENT_FIELDS
end
end
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