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Refactor date lookup

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Hakan Ensari 2024-11-20 14:22:08 +01:00
parent 7c99f214e6
commit 6faa265834
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1 changed files with 13 additions and 12 deletions
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25
lib/day.rb
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@ -3,23 +3,17 @@
class Day < Sequel::Model class Day < Sequel::Model
dataset_module do dataset_module do
def latest(date = Date.today) def latest(date = Date.today)
where(date: select(:date).where(Sequel[:date] <= date) where(date: _nearest_date_with_rates(date))
.order(Sequel.desc(:date))
.limit(1))
end end
# Returns rates for a given date interval
#
# If the start date falls on a holiday/weekend, rates start from the closest preceding business day.
def between(interval) def between(interval)
return where(false) if interval.begin > Date.today return where(false) if interval.begin > Date.today
previous_date = select(:date) where(Sequel.expr(:date) >= Sequel.function(
.where(Sequel[:date] <= interval.begin) :coalesce,
.order(Sequel.desc(:date)) _nearest_date_with_rates(interval.begin),
.limit(1) interval.begin,
))
where(Sequel.expr(:date) >= Sequel.function(:coalesce, previous_date, interval.begin))
.where(Sequel.expr(:date) <= interval.end) .where(Sequel.expr(:date) <= interval.end)
end end
@ -31,5 +25,12 @@ class Day < Sequel::Model
) )
.join(Sequel.function(:jsonb_each, :rates).lateral.as(:rates), true) .join(Sequel.function(:jsonb_each, :rates).lateral.as(:rates), true)
end end
def _nearest_date_with_rates(date)
select(:date)
.where(Sequel[:date] <= date)
.order(Sequel.desc(:date))
.limit(1)
end
end end
end end