25 lines
505 B
Ruby
25 lines
505 B
Ruby
# frozen_string_literal: true
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require "bucket"
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require "db"
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require "rate_scopes"
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class Rate < Sequel::Model(:rates)
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include RateScopes
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class << self
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def date_column = :date
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end
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dataset_module do
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def downsample(precision)
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sampler = Bucket.expression(precision)
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select(:base, :provider, :quote)
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.select_append { avg(rate).as(rate) }
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.select_append(sampler.as(:date))
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.group(:base, :provider, :quote, sampler)
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.order(:date)
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end
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end
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end
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