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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
Fugu Ultra v2
## åå
`order["price"]` ã **æ°å€ã§ã¯ãªãæåå (`str`)** ã§è¿ã£ãŠããŠããããšãåå ã§ãã
Python ã§ã¯ `"1200" * 3` ã¯æãç®ã§ã¯ãªããæååã3åç¹°ãè¿ãããšããæå³ã«ãªããŸããä»å㯠`quantity` ã `int` ãªã®ã§äžèŠæç«ãããã§ããããšã©ãŒã¡ãã»ãŒãžã瀺ãéã `str * int` ã®çµã¿åããã§åãåã¿åãã `TypeError` ã«ãªã£ãŠããŸãã
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1. **ã«ã©ã åãæåå** â `price` ã `VARCHAR`/`TEXT` ã§å®çŸ©ãããŠããïŒ`"1,200"` ã `"$12.00"` ã®ãããªå€ãæ··ãã£ãŠããã±ãŒã¹ãïŒ
2. **DBãã©ã€ãã®å倿** â MySQL ã® `DECIMAL` ãæååã§è¿ãèšå®ïŒ`raw=True` ãªã©ïŒãSQLite ã«æååã®ãŸãŸ INSERT ãããŠãã
3. **ã¢ããªå±€ã§æååå** â ãã©ãŒã /JSON ã®å
¥åã倿ããã«ãã®ãŸãŸ INSERT ããŠãã
ãŸãå®éã®åã確èªãããšåãåããã§ããŸãã
```python
rows = db.query("SELECT price, quantity FROM orders WHERE user_id = %s", user_id)
for r in rows[:5]:
print(repr(r["price"]), type(r["price"]), repr(r["quantity"]), type(r["quantiâŠ
å¿çæé 97.1ç§åºå 6218 ããŒã¯ã³
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ãšã©ãŒã¡ãã»ãŒãžãTypeError: unsupported operand type(s) for *: 'str' and 'int'ããã倿ãããšã`order["price"]`ãŸãã¯`order["quantity"]`ã®ãããããæååïŒ`str`ïŒã§ãããæŽæ°ïŒ`int`ïŒãšæãç®ãããããšããŠå€±æããŠããŸãããã®å Žåã`price`ã`quantity`ãæ°å€åã«å€æããå¿
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以äžã®ããã«ä¿®æ£ã§ããŸãïŒ
```python
def get_user_orders(user_id):
orders = db.query("SELECT price, quantity FROM orders WHERE user_id = %s", user_id)
total = sum(float(order["price"]) * int(order["quantity"]) for order in orders)
return {"user_id": user_id, "total": total, "orders": orders}
```
### ä¿®æ£ç¹ïŒ
1. `order["price"]`ã`float(order["price"])`ã«å€æŽããŠãæååãæµ®åå°æ°ç¹æ°ã«å€æã
2. `order["quantity"]`ã`int(order["quantity"])`ã«å€æŽããŠãæååãæŽæ°ã«å€æã
ããã«ãããèšç®ãæ£åžžã«è¡ãããããã«ãªãããšã©ãŒãè§£æ¶ãããã¯ãã§ãã
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- ããŒã¿ããŒã¹ããâŠ
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async function fetchAllUsers(page: number = 1): Promise<any[]> {
let allUsers: any[] = [];
let hasMore = true;
let currentPage = page;
while (hasMoâŠ
Fugu Ultra v2
# ã³ãŒãã¬ãã¥ãŒ: `fetchAllUsers`
ããžãã¯ã®æå³ã¯æç¢ºã§ã`async/await` ã«ããçŽ çŽãªå®è£
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---
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| 8 | ð äžâŠ
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颿° `fetchAllUsers` ã«ã€ããŠãå¯èªæ§ã»ããã©ãŒãã³ã¹ã»ãã¹ããã©ã¯ãã£ã¹ã®èгç¹ããããã€ãã®æ¹åç¹ãææ¡ããŸãã
### 1. `Promise<any[]>` ã®åå®çŸ©ãæç¢ºã«
è¿ãå€ã®åã `any[]` ãšããã®ã¯é¿ããã¹ãã§ããé©åãªåå®çŸ©ãäœæããããšã§ãå¯èªæ§ãšå®å
šæ§ãåäžãããããšãã§ããŸãã
```typescript
interface User {
id: number;
name: string;
email: string;
}
async function fetchAllUsers(page: number = 1): Promise<User[]> {
```
### 2. ååä»ã倿°ã®äœ¿çš
`currentPage` ãšãã倿°åãããçŽæ¥ `page` 倿°ãæŽæ°ããã»ããçè§£ãããããªããŸãããŸããããŒãžããŒã·ã§ã³ã«é¢ããåŠçã颿°å
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### 4. ãšã©ãŒãã³ããªã³ã°
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