runtime sql error fixed

brmbar3/SQL

@@ -39,7 +39,8 @@ CREATE TABLE accounts (
 
 	acctype account_type NOT NULL,
 
-	active BOOLEAN NOT NULL DEFAULT TRUE
+	active BOOLEAN NOT NULL DEFAULT TRUE,
+	crbalance DECIMAL(12,2) NOT NULL
 );
 INSERT INTO accounts (name, currency, acctype) VALUES ('BrmBar Cash', (SELECT id FROM currencies WHERE name='Kč'), 'cash');
 INSERT INTO accounts (name, currency, acctype) VALUES ('BrmBar Profits', (SELECT id FROM currencies WHERE name='Kč'), 'income');
@@ -92,12 +93,14 @@ CREATE TABLE transaction_splits (
 -- Note that currency information is currently not supplied; inventory items
 -- have balances in stock amounts.
 CREATE VIEW account_balances AS
-	SELECT ts.account AS id, accounts.name AS name, accounts.acctype AS acctype,
-		-SUM(CASE WHEN ts.side = 'credit' THEN -ts.amount ELSE ts.amount END) AS crbalance
-		FROM transaction_splits AS ts
-		LEFT JOIN accounts ON accounts.id = ts.account
-		GROUP BY ts.account, accounts.name, accounts.acctype
-		ORDER BY crbalance ASC;
+	SELECT id, name, acctype, crbalance FROM accounts ORDER BY crbalance ASC;
+
+--	SELECT ts.account AS id, accounts.name AS name, accounts.acctype AS acctype,
+--		-SUM(CASE WHEN ts.side = 'credit' THEN -ts.amount ELSE ts.amount END) AS crbalance
+--		FROM transaction_splits AS ts
+--		LEFT JOIN accounts ON accounts.id = ts.account
+--		GROUP BY ts.account, accounts.name, accounts.acctype
+--		ORDER BY crbalance ASC;
 
 -- Transaction splits in a form that's nicer to query during manual inspection
 CREATE VIEW transaction_nicesplits AS

brmbar3/brmbar/Account.py

@@ -45,11 +45,9 @@ class Account:
         return cls(db, name = name, id = id, currency = currency, acctype = acctype)
 
     def balance(self):
-        debit = self.db.execute_and_fetch("SELECT SUM(amount) FROM transaction_splits WHERE account = %s AND side = %s", [self.id, 'debit'])
-        debit = debit[0] or 0
-        credit = self.db.execute_and_fetch("SELECT SUM(amount) FROM transaction_splits WHERE account = %s AND side = %s", [self.id, 'credit'])
-        credit = credit[0] or 0
-        return debit - credit
+        crbalance = self.db.execute_and_fetch("SELECT crbalance FROM accounts WHERE id = %s", [self.id])
+        crbalance = crbalance[0] or 0
+        return crbalance
 
     def balance_str(self):
         return self.currency.str(self.balance())
@@ -63,10 +61,13 @@ class Account:
     def credit(self, transaction, amount, memo):
         return self._transaction_split(transaction, 'credit', amount, memo)
 
+# XXX atomicita
     def _transaction_split(self, transaction, side, amount, memo):
         """ Common part of credit() and debit(). """
         self.db.execute("INSERT INTO transaction_splits (transaction, side, account, amount, memo) VALUES (%s, %s, %s, %s, %s)", [transaction, side, self.id, amount, memo])
 
+        self.db.execute("UPDATE accounts set crbalance = crbalance + (CASE WHEN %s = 'credit' THEN -%s ELSE %s END)", [side,amount,amount])
+
     def add_barcode(self, barcode):
         self.db.execute("INSERT INTO barcodes (account, barcode) VALUES (%s, %s)", [self.id, barcode])
         self.db.commit()

brmbar3/brmbar/Shop.py

@@ -105,16 +105,12 @@ class Shop:
     def credit_balance(self):
         # We assume all debt accounts share a currency
         sumselect = """
-            SELECT SUM(ts.amount)
-                FROM accounts AS a
-                LEFT JOIN transaction_splits AS ts ON a.id = ts.account
-                WHERE a.acctype = %s AND ts.side = %s
+            SELECT SUM(crbalance)
+                FROM accounts WHERE acctype = %s
         """
-        cur = self.db.execute_and_fetch(sumselect, ["debt", 'debit'])
-        debit = cur[0] or 0
-        credit = self.db.execute_and_fetch(sumselect, ["debt", 'credit'])
-        credit = credit[0] or 0
-        return debit - credit
+        cur = self.db.execute_and_fetch(sumselect, ["debt"])
+        cur = cur[0] or 0
+        return cur
     def credit_negbalance_str(self):
         return self.currency.str(-self.credit_balance())