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Code Issues Releases Activity Actions

Multi-Currency Part 2 (#543)

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* Support all currencies, handle outside DB

* Remove currencies from seed

* Fix account balance namespace

* Set default currency on authentication

* Cache currency instances

* Implement multi-currency syncs with tests

* Series fallback, passing tests

* Fix conflicts

* Make value group concrete class that works with currency values

* Fix migration conflict

* Update tests to expect multi-currency results

* Update account list to use group method

* Namespace updates

* Fetch unknown exchange rates from API

* Fix date range bug

* Ensure demo data works without external API

* Enforce cascades only at DB level
This commit is contained in:
Zach Gollwitzer 2024-03-21 13:39:10 -04:00 • committed by GitHub
parent de0cba9fed
commit 110855d077
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55 changed files with 1226 additions and 714 deletions
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49
app/models/account/syncable.rb
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@ -7,8 +7,12 @@ module Account::Syncable
def sync
update!(status: "syncing")
synced_daily_balances = Account::BalanceCalculator.new(self).daily_balances
self.balances.upsert_all(synced_daily_balances, unique_by: :index_account_balances_on_account_id_and_date)
sync_exchange_rates
calculator = Account::Balance::Calculator.new(self)
calculator.calculate
self.balances.upsert_all(calculator.daily_balances, unique_by: :index_account_balances_on_account_id_date_currency_unique)
self.balances.where("date < ?", effective_start_date).delete_all
update!(status: "ok")
rescue => e
@ -23,4 +27,45 @@ module Account::Syncable
[ first_valuation_date, first_transaction_date&.prev_day ].compact.min || Date.current
end
# Finds all the rate pairs that are required to calculate balances for an account and syncs them
def sync_exchange_rates
rate_candidates = []
if multi_currency?
transactions_in_foreign_currency = self.transactions.where.not(currency: self.currency).pluck(:currency, :date).uniq
transactions_in_foreign_currency.each do |currency, date|
rate_candidates << { date: date, from_currency: currency, to_currency: self.currency }
end
end
if foreign_currency?
(effective_start_date..Date.current).each do |date|
rate_candidates << { date: date, from_currency: self.currency, to_currency: self.family.currency }
end
end
existing_rates = ExchangeRate.where(
base_currency: rate_candidates.map { |rc| rc[:from_currency] },
converted_currency: rate_candidates.map { |rc| rc[:to_currency] },
date: rate_candidates.map { |rc| rc[:date] }
).pluck(:base_currency, :converted_currency, :date)
# Convert to a set for faster lookup
existing_rates_set = existing_rates.map { |er| [ er[0], er[1], er[2].to_s ] }.to_set
rate_candidates.each do |rate_candidate|
rc_from = rate_candidate[:from_currency]
rc_to = rate_candidate[:to_currency]
rc_date = rate_candidate[:date]
next if existing_rates_set.include?([ rc_from, rc_to, rc_date.to_s ])
logger.info "Fetching exchange rate from provider for account #{self.name}: #{self.id} (#{rc_from} to #{rc_to} on #{rc_date})"
rate = ExchangeRate.fetch_rate_from_provider(rc_from, rc_to, rc_date)
ExchangeRate.create! base_currency: rc_from, converted_currency: rc_to, date: rc_date, rate: rate if rate
end
nil
end
end