我有一个
usersclass users(db.Model):
name = db.Column('name', db.String(100), primary_key=True)
password = db.Column('password', db.String(100))
role = db.Column('role', db.String(100))
def __init__(self, name: str, password: str, role: str):
self.name = name
self.password = password
self.role = role
我正在尝试创建一个登录表单，其中成功登录需要将用户名与密码匹配。为此，我尝试了以下查询：
user = request.form['Username']
password = request.form['Password']
found_user = users.query.filter_by(name=user, password=password).first()
然而，这个方法并没有达到预期的效果。我收到一条错误，指出
users[]编辑：
我想我已经找到问题了：
我尝试删除 SQLAlchemy 类代码并使用以下代码：
from flask import Flask,render_template,request
from flask_sqlalchemy import SQLAlchemy
app = Flask(__name__)
app.app_context().push()
app.config['SQLALCHEMY_DATABASE_URI']='sqlite:///db.sqlite3'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS']=False
db = SQLAlchemy(app)
class users(db.Model):
name = db.Column('name',db.String(100),primary_key=True)
password = db.Column('password',db.String(100))
role = db.Column('role',db.String(100))
def __init__(self,name:str,password:str,role:str):
self.name = name
self.password = password
self.role = role
with app.app_context():
db.create_all()
admin = users('Admin','RootRules99','Admin')
loggedInUsr:users
db.session.add(admin)
db.session.commit()
@app.route('/',methods=['POST','GET'])
def frontPage():
if request.method=='POST':
user = request.form['Username']
password = request.form['Password']
return user,password
else:
return render_template('mywebsite.html')
这个 html 网页：
<style>
button
{
font-family: Verdana, Geneva, Tahoma, sans-serif;
font-size: medium;
color:black;
background-color: aliceblue;
border-style: hidden;
shape-outside: border-box;
cursor: default;
height: 36px;
width: 144px;
border-radius: 9px;
top: 500px;
left: 680px;
position: absolute;
}
button:hover
{
background-color: orangered;
}
</style>
<head>
<title>Sign in/Sign up</title>
</head>
<body background="backColorWebsite.png">
<form action="#" method="post">
<input type="text" id="Username" value="Username" style="font-
family:Verdana, Geneva, Tahoma, sans-serif; background-color:
aliceblue; position: absolute; top:250px;left:680px; width:144px;
height:27px; border-radius: 9px; color:gray" maxlength="10">
</input>
<input type="password" id="Password" value="Password" style="font-
family:Verdana, Geneva, Tahoma, sans-serif; background-color:
aliceblue; position: absolute; top:350px;left:680px; width:144px;
height:27px; border-radius: 9px; color:gray" maxlength="10">
</input>
<button>Sign In</button>
</body>
如果我输入凭据“Hi”和“Admin”，网站只会打印出“Hi”，这很奇怪，因为它根本没有考虑“Admin”一词。我应该如何解决这个问题？
使用在输入字段的 name 属性中定义的键来查询表单字段数据。您尚未定义名称属性，因此不会收到任何数据。
此外，您的表单元素在 HTML 代码中未正确关闭。
from flask import Flask,render_template,request
from flask_sqlalchemy import SQLAlchemy
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI']='sqlite:///db.sqlite3'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS']=False
db = SQLAlchemy(app)
class User(db.Model):
__tablename__ = 'users'
id = db.Column(Integer, primary_key=True)
username = db.Column(db.String(100))
password = db.Column(db.String(100))
with app.app_context():
db.create_all()
admin = User(
username='Admin',
password='RootRules99'
)
db.session.add(admin)
db.session.commit()
@app.route('/', methods=['GET', 'POST'])
def index():
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
print(username, password)
return render_template('index.html')
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Sign in/Sign up</title>
</head>
<body>
<form method="post">
<div>
<label for="username">Username</label>
<input type="text" id="username" name="username" />
</div>
<div>
<label for="password">Password</label>
<input type="password" id="password" name="password" />
</div>
<button type="submit">Sign In</button>
</form>
</body>
</html>