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Traceback (most recent call last):
File "app.py", line 23, in get_user_orders
total = sum(order["price"] * order["quantity"] for order in orders)
TypeError: unsupportâŠ
Kimi K3
## åå
ãšã©ãŒã¡ãã»ãŒãžã瀺ãéãã`order["price"]` ã **æååïŒstrïŒ** ã«ãªã£ãŠããã®ãåå ã§ããæ°å€åå£«ã®æŒç®ãæåŸ
ããŠããã®ã«ãDBããååŸãã `price` ãæååãšããŠè¿ãããŠãããããä¹ç®ã«å€±æããŠããŸãã
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1. **DBã®ã«ã©ã å®çŸ©ãæååå** â `price` ã«ã©ã ã `DECIMAL`/`NUMERIC` ã§ã¯ãªã `VARCHAR`/`TEXT` ã§å®çŸ©ãããŠãã
2. **DBãã©ã€ãã®ä»æ§** â äžéšã®ãã©ã€ããèšå®ã§ã¯ãæ°å€ã«ã©ã ã§ãæååãšããŠè¿ãããšããã
3. **ããŒã¿æå
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ãŸã以äžã§åã確èªãããšåå ãç¹å®ããããã§ãïŒ
```python
print(type(order["price"]), order["price"])
```
## ä¿®æ£æ¹æ³
### å¿æ¥åŠçœ®ïŒã¢ããªã±ãŒã·ã§ã³åŽã§å倿ïŒ
```python
from decimal import Decimal
def get_user_orders(user_id):
orders = db.query("SELECT price, quantity FROM orders WHERE user_id = %s", user_id)
total = sum(Decimal(order["price"]) * int(order["quantity"]) for order in ordeâŠ
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åå ã¯ã`order["price"]` ãæ°å€ã§ã¯ãªãæååã«ãªã£ãŠããããšã§ãã
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```text
TypeError: unsupported operand type(s) for *: 'str' and 'int'
```
ã¯ã次ã®ããã«ãæåå Ã æŽæ°ããèšç®ããããšãããšãã«åºãŸãã
```python
"1000" * 2
```
æ¬æ¥ã¯æ°å€ãšããŠæãç®ãããã®ã«ãDB ããååŸãã `price` ãæåååã«ãªã£ãŠãããã倱æããŠããŸãã
---
## èããããåå
äŸãã°æ¬¡ã®ãããªã±ãŒã¹ã§ãã
1. `orders.price` ã«ã©ã ã `TEXT` / `VARCHAR` åã«ãªã£ãŠãã
2. DB ãã©ã€ããäŸ¡æ ŒãæååãšããŠè¿ããŠãã
3. ããŒã¿ãšã㊠`"1000"` ã®ããã«æååä¿åãããŠãã
4. SQL åŽã§æååãšããŠååŸããŠããŸã£ãŠãã
çŸåšã®ã³ãŒãã§ã¯ã`price` ãæååã®ãŸãŸæãç®ã«äœ¿ãããŠããŸãã
```python
total = sum(order["price"] * order["quantity"] for order in orders)
```
---
## ç°¡åãªä¿®æ£
æäœéã®ä¿®æ£ãšããŠã¯ã`price` ãæ°å€ã«å€æããŸãã
```python
def get_user_orders(user_id):
orders = db.query(
"SELECT price, quantity FROM orders WHERE userâŠ
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