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6fa40e0fa2
* Fetch exchnage rates in bulk * Handle paginated response * Rename method and improve tests * Change argument names * Use standard date format
28 lines
881 B
Ruby
28 lines
881 B
Ruby
class ExchangeRate < ApplicationRecord
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include Provided
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validates :from_currency, :to_currency, :date, :rate, presence: true
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class << self
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def find_rate(from:, to:, date:, cache: true)
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result = find_by \
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from_currency: from,
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to_currency: to,
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date: date
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result || fetch_rate_from_provider(from:, to:, date:, cache:)
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end
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def find_rates(from:, to:, start_date:, end_date: Date.current, cache: true)
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rates = self.where(from_currency: from, to_currency: to, date: start_date..end_date).to_a
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all_dates = (start_date..end_date).to_a
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existing_dates = rates.map(&:date)
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missing_dates = all_dates - existing_dates
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if missing_dates.any?
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rates += fetch_rates_from_provider(from:, to:, start_date: missing_dates.first, end_date: missing_dates.last, cache:)
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end
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rates
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end
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end
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end
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