Python 错误：函数返回None或结束时没有返回语句。但在哪里找不到？
我正试图根据用户填写的表单中提交的数据更新数据库数据，但我收到此错误：Python 错误：函数返回None或结束时没有返回语句。但在哪里找不到？,python,html,sql,flask,Python,Html,Sql,Flask,我正试图根据用户填写的表单中提交的数据更新数据库数据，但我收到此错误： @app.route('/kudson/edit/<id>', methods=['POST', 'GET']) def editid(id): if request.method == 'POST': pass else: try: id = request.form['no']
@app.route('/kudson/edit/<id>', methods=['POST', 'GET'])
def editid(id):
if request.method == 'POST':
pass
else:
try:
id = request.form['no']
date = request.form['date']
mo_62_upsd = request.form['mo_62_upsd']
mo_62_bpsd = request.form['mo_62_bpsd']
mo_87_upsd = request.form['mo_87_upsd']
mo_87_bpsd = request.form['mo_87_bpsd']
af_62_upsd = request.form['af_62_upsd']
af_62_bpsd = request.form['af_62_bpsd']
af_87_upsd = request.form['af_87_upsd']
af_87_bpsd = request.form['af_87_bpsd']
ev_62_upsd = request.form['ev_62_upsd']
ev_62_bpsd = request.form['ev_62_bpsd']
ev_87_upsd = request.form['ev_87_upsd']
ev_87_bpsd = request.form['ev_87_bpsd']
with sql.connect(con_string) as con:
cur = con.cursor()
params = date, mo_62_upsd, mo_62_bpsd, mo_87_upsd, mo_87_bpsd, af_62_upsd, af_62_bpsd, af_87_upsd, af_87_bpsd, ev_62_upsd, ev_62_bpsd, ev_87_upsd, ev_87_bpsd, id
cur.execute("""UPDATE kudson_shift_daily_sell
SET date=?, mo_62_upsd = %s, mo_62_bpsd = %s, mo_87_upsd = %s, mo_87_bpsd = %s, af_62_upsd = %s, af_62_bpsd = %s, af_87_upsd = %s, af_87_bpsd = %s, ev_62_upsd = %s, ev_62_bpsd = %s, ev_87_upsd = %s, ev_87_bpsd = %s
WHERE id = %s""", params)
con.commit()
msg = "แก้ไขข้อมูลสำเร็จ"
return render_template("kudson_edit.html", msg=msg)
except Exception as e:
return render_template("kudson_edit.html", msg=e)
if __name__ == '__main__':
app.run(debug=True)
Traceback (most recent call last):
File "C:\Users\thanaphonsae\PycharmProjects\Kudson\venv\lib\site-packages\flask\app.py", line 2309, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Users\thanaphonsae\PycharmProjects\Kudson\venv\lib\site-packages\flask\app.py", line 2295, in wsgi_app
response = self.handle_exception(e)
File "C:\Users\thanaphonsae\PycharmProjects\Kudson\venv\lib\site-packages\flask\app.py", line 1741, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\thanaphonsae\PycharmProjects\Kudson\venv\lib\site-packages\flask\_compat.py", line 35, in reraise
raise value
File "C:\Users\thanaphonsae\PycharmProjects\Kudson\venv\lib\site-packages\flask\app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
File "C:\Users\thanaphonsae\PycharmProjects\Kudson\venv\lib\site-packages\flask\app.py", line 1816, in full_dispatch_request
return self.finalize_request(rv)
File "C:\Users\thanaphonsae\PycharmProjects\Kudson\venv\lib\site-packages\flask\app.py", line 1831, in finalize_request
response = self.make_response(rv)
File "C:\Users\thanaphonsae\PycharmProjects\Kudson\venv\lib\site-packages\flask\app.py", line 1957, in make_response
'The view function did not return a valid response. The'
TypeError: The view function did not return a valid response. The function either returned None or ended without a return statement.
<!DOCTYPE html>
<html lang="en">
<center>
<tbody>
<table id="myTable" class="table table-sm" cellspacing="0">
<form action ="{{ url_for('editid',id=rows[0])}}" method="POST">
<h1>ร้านสาขา {{rows[2]}}</h1>
ผลการแก้ไขข้อมูล: {{ msg }}
<thead class="thead-dark">
<tr class="header active">
<th scope="col"><input name="date" value="{{rows[1]}}"></th>
<th scope="col">PMA</th>
<th scope="col">UPSD</th>
<th scope="col">BPSD</th>
</tr>
</thead>
<tbody>
<tr>
<th scope="row">เช้า</th>
<td>62</td>
<td><input name="mo_62_upsd" value="{{rows[3]}}"></td>
<td><input name="mo_62_bpsd" value="{{rows[4]}}"></td>
</tr>
<tr></tr>
<tr>
<th scope="row">เช้า</th>
<td>87</td>
<td><input name="mo_87_upsd" value="{{rows[5]}}"></td>
<td><input name="mo_87_bpsd" value="{{rows[6]}}"></td>
</tr>
<tr>
<th scope="row">บ่าย</th>
<td>62</td>
<td><input name="af_62_upsd" value="{{rows[7]}}"></td>
<td><input name="af_62_bpsd" value="{{rows[8]}}"></td>
</tr>
<tr>
<th scope="row">บ่าย</th>
<td>87</td>
<td><input name="af_87_upsd" value="{{rows[9]}}"></td>
<td><input name="af_87_bpsd" value="{{rows[10]}}"></td>
</tr>
<tr>
<th scope="row">ดึก</th>
<td>62</td>
<td><input name="ev_62_upsd" value="{{rows[11]}}"></td>
<td><input name="ev_62_bpsd" value="{{rows[12]}}"></td>
</tr>
<tr>
<th scope="row">ดึก</th>
<td>87</td>
<td><input name="ev_87_upsd" value="{{rows[13]}}"></td>
<td><input name="ev_87_bpsd" value="{{rows[14]}}"></td>
</tr>
<tr></tr>
<center>
<td width="50%"><input type="submit" value="submit"/></td>
<tr></tr>
<td><a href = "/kudson/update">กลับหน้าหลัก</a></td>
</center>
</tbody>
</form>
</table>
</center>
</html>
ร้านสาขา {{行[2]}
ผลการแก้ไขข้อมูล: {{msg}}
PMA
UPSD
BPSD
เช้า
62
เช้า
87
บ่าย
62
บ่าย
87
ดึก
62
ดึก
87
@app.route('/kudson/edit/<id>', methods=['POST', 'GET'])
def editid(id):
if request.method == 'POST':
pass
else:
try:
id = request.form['no']
date = request.form['date']
mo_62_upsd = request.form['mo_62_upsd']
mo_62_bpsd = request.form['mo_62_bpsd']
mo_87_upsd = request.form['mo_87_upsd']
mo_87_bpsd = request.form['mo_87_bpsd']
af_62_upsd = request.form['af_62_upsd']
af_62_bpsd = request.form['af_62_bpsd']
af_87_upsd = request.form['af_87_upsd']
af_87_bpsd = request.form['af_87_bpsd']
ev_62_upsd = request.form['ev_62_upsd']
ev_62_bpsd = request.form['ev_62_bpsd']
ev_87_upsd = request.form['ev_87_upsd']
ev_87_bpsd = request.form['ev_87_bpsd']
with sql.connect(con_string) as con:
cur = con.cursor()
params = date, mo_62_upsd, mo_62_bpsd, mo_87_upsd, mo_87_bpsd, af_62_upsd, af_62_bpsd, af_87_upsd, af_87_bpsd, ev_62_upsd, ev_62_bpsd, ev_87_upsd, ev_87_bpsd, id
cur.execute("""UPDATE kudson_shift_daily_sell
SET date=?, mo_62_upsd = %s, mo_62_bpsd = %s, mo_87_upsd = %s, mo_87_bpsd = %s, af_62_upsd = %s, af_62_bpsd = %s, af_87_upsd = %s, af_87_bpsd = %s, ev_62_upsd = %s, ev_62_bpsd = %s, ev_87_upsd = %s, ev_87_bpsd = %s
WHERE id = %s""", params)
con.commit()
msg = "แก้ไขข้อมูลสำเร็จ"
return render_template("kudson_edit.html", msg=msg)
except Exception as e:
return render_template("kudson_edit.html", msg=e)
if __name__ == '__main__':
app.run(debug=True)
@app.route（'/kudson/edit/'，methods=['POST'，'GET']
def editid（id）：
如果request.method==“POST”：
通过
其他：
尝试：
id=请求。表格['no']
日期=请求。表格['date']
mo_62_upsd=请求。表单['mo_62_upsd']
mo_62_bpsd=请求。表单['mo_62_bpsd']
mo_87_upsd=请求。表单['mo_87_upsd']
mo_87_bpsd=请求。表单['mo_87_bpsd']
af_62_upsd=请求。表单['af_62_upsd']
af_62_bpsd=请求。表单['af_62_bpsd']
af_87_upsd=请求。表单['af_87_upsd']
af_87_bpsd=请求。表格['af_87_bpsd']
ev_62_upsd=请求。表单['ev_62_upsd']
ev_62_bpsd=请求。表格['ev_62_bpsd']
ev_87_upsd=请求。表格['ev_87_upsd']
ev_87_bpsd=请求。表格['ev_87_bpsd']
使用sql.connect（con_字符串）作为con:
cur=con.cursor（）
参数=日期、日期、日期、日期、日期、日期、日期、日期、日期、日期、日期
cur.execute（““”更新kudson\u shift\u daily\u sell
设置日期=？，mo_62_upsd=%s，mo_62_bpsd=%s，mo_87_upsd=%s，mo_87_bpsd=%s，af_62_upsd=%s，af_62_bpsd=%s，af_87_upsd=%s，af_87_bpsd=%s，ev_62_upsd=%s，ev_87_upsd=%s，ev_87_bpsd=%s
其中id=%s“”，参数）
con.commit（）
味精=”แก้ไขข้อมูลสำเร็จ"
返回render_模板（“kudson_edit.html”，msg=msg）
例外情况除外，如e：
返回render_模板（“kudson_edit.html”，msg=e）
如果uuuu name uuuuuu='\uuuuuuu main\uuuuuuu'：
app.run（debug=True）
任何帮助都将不胜感激！如果您正在执行
POST即可，代码将继续运行，但没有其他操作或返回，并且函数将在不返回接受值的情况下退出。您必须返回有效的HTTP响应 问题是您的POST
响应无效。正如@Shinra所指出的，您只需在POST处理程序中执行pass
，而这不是有效的HTTP响应。发生这种情况是因为表单执行时它已被定向到您的editid
路由：
<form action ="{{ url_for('editid',id=rows[0])}}" method="POST">
但是您的POST
路由没有返回有效的HTTP响应：
def editid(id):
if request.method == 'POST':
pass
您需要决定在提交此表单数据时要对其执行什么操作。您可能需要验证它，将其保存在数据库中，并根据上述操作返回适当的重定向视图。Quick note-我的呼叫在我的表单中实际失败。validate（）我不知道flask是怎么知道的，但它要求在执行了它应该执行的任何验证操作之后返回某些内容（即，您不仅必须在form.validate（）if语句中返回，而且还必须在它之后返回）