我正在尝试更新我的注册系统。我希望用户输入他的年龄，但我不知道如何检查用户是否仅输入数字。我将给出我的代码片段，它不起作用
我的观点.py：
def Registration(request):
if request.method == "POST":
username = request.POST["username"]
age = request.POST["age"]
...
if username.isnumeric() == "True":
messages.error(request, "Username can't be all number!")
return redirect("/")
if age.isnumeric() == "False":
messages.error(request, "Age must be all numbers!")
return redirect("/")
...
messages.success(request, "Your account has been succesfully created")
return redirect("/Login/")
return render(request, "Registration.html")
我的注册.html：
{% load static %}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width-device-width, initial-scale=1, maximum-scale=1" />
<link rel="stylesheet" type="text/css" href="https://bootswatch.com/5/solar/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="{% static 'css/styles.css' %}">
<title> view tasks </title>
</head>
<body>
<div class="text-center">
<h1>Registrate here</h1>
<form action="/Registration/" method="post">
{% csrf_token %}
<label for"username">Username</label>
<br>
<input class="" type="text" id="username" name="username" placeholder="Create a username (letter and numbers only)" Required>
<br> <br>
<label for"age">Age</label>
<br>
<input class="" type="text" id="age" name="age" placeholder="Enter your age" Required>
<br> <br>
<label for"fname">First Name</label>
<br>
<input class="" type="text" id="fname" name="fname" placeholder="Enter your first name" Required>
<br> <br>
<label for"lname">Last Name</label>
<br>
<input class="" type="text" id="lname" name="lname" placeholder="Enter your last name" Required>
<br> <br>
<label for"email">Email</label>
<br>
<input class="" type="email" id="email" name="email" placeholder="Enter your email" Required>
<br> <br>
<label for"pass1">Password</label>
<br>
<input class="" type="password" id="pass1" name="pass1" placeholder="Create your password" Required>
<br> <br>
<label for"pass2">Confirm Password</label>
<br>
<input class="" type="password" id="pass2" name="pass2" placeholder="Confirm your password" Required>
<br> <br>
<button type"submit"> Registrate </button>
</form>
</div>
</body>
<script src="https://code.jquery.com/jquery-3.3.1.min.js" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"
integrity="sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI" crossorigin="anonymous">
</script>
</html>
我尝试研究可以解决我的问题的函数，但我没有找到任何东西，也许看起来不够。问题不在于引发错误，它在其他 if 上起作用。 Age.isnumeric() 没有像我想象的那样工作。
isnumeric() 方法返回 True 或 False，作为布尔值，而不是字符串，因此您应该删除“”并具有类似的内容：
if username.isnumeric() == True:
# THE REST OF YOUR CODE
您可以从
更新
registration.html中的输入字段
<input class="" type="text" id="age" name="age" placeholder="Enter your age" Required>
到
<input type="number" id="age" name="age" min="10" max="100" />
您可以在这里阅读更多相关信息