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class StoredValue < ApplicationRecord
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scope :valid, lambda {
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where(["expire_at > ?", Time.now]).or(where(expire_at: nil))
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}
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scope :expired, ->(ago = 0) { where(["expire_at <= ?", (Time.now - ago)]) }
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def self.write(result_key, result_value, expire_at: nil)
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record = find_by(key: result_key) || new(key: result_key)
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record.value = result_value
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record.expire_at = expire_at
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record.save
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end
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def self.read(result_key)
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record = valid.find_by(key: result_key)
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record&.value&.force_encoding('UTF-8')
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end
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end
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