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brmbar.Currency.rates(): Use _latest_ exchange rate, not earliest

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Petr Baudis 2012-09-28 22:00:09 +02:00
parent 072aa83479
commit 6ac230c7d9
1 changed files with 2 additions and 2 deletions
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brmbar3/brmbar/Currency.py
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@ -45,14 +45,14 @@ class Currency:
$sell is the price of $self in means of $other when selling it (from brmbar) """
with closing(self.db.cursor()) as cur:
cur.execute("SELECT rate, rate_dir FROM exchange_rates WHERE target = %s AND source = %s", [self.id, other.id])
cur.execute("SELECT rate, rate_dir FROM exchange_rates WHERE target = %s AND source = %s AND valid_since <= NOW() ORDER BY valid_since DESC LIMIT 1", [self.id, other.id])
res = cur.fetchone()
if res is None:
raise NameError("Currency.rate(): Unknown conversion " + other.name() + " to " + self.name())
buy_rate, buy_rate_dir = res
buy = buy_rate if buy_rate_dir == "target_to_source" else 1/buy_rate
cur.execute("SELECT rate, rate_dir FROM exchange_rates WHERE target = %s AND source = %s", [other.id, self.id])
cur.execute("SELECT rate, rate_dir FROM exchange_rates WHERE target = %s AND source = %s AND valid_since <= NOW() ORDER BY valid_since DESC LIMIT 1", [other.id, self.id])
res = cur.fetchone()
if res is None:
raise NameError("Currency.rate(): Unknown conversion " + self.name() + " to " + other.name())