user = User.query.filter(or_(User.username == username, User.email == username)).first()
时间: 2023-09-10 07:12:10 浏览: 30
这段代码是使用 Flask 框架中的 SQLAlchemy 插件对数据库进行查询操作。其中的 `User` 是一个 SQLAlchemy 的模型类,`query` 方法表示要进行查询操作,`filter` 方法用于设置查询条件,`or_` 方法表示两个条件中满足任意一个即可,`first` 方法表示只返回满足条件的第一个结果。具体来说,这段代码会查询 `User` 模型中,用户名或者邮箱地址与 `username` 变量相等的第一个用户,并将其赋值给 `user` 变量。
相关问题
class UserSigninLog(db.Model): """登录日志表""" bind_key = 'db2' tablename = 'user_signin_log' id = mapped_column(Integer, primary_key=True) userid = mapped_column(String(16), index=True) username = mapped_column(String(32)) ip_addr = mapped_column(String(32)) request_user_agent = mapped_column(String(256)) c_date = mapped_column(DateTime) @staticmethod def add_user_signin_log(userid: str, username: str): """新增登录日志""" user_signin_log = UserSigninLog() user_signin_log.userid = userid user_signin_log.username = username user_signin_log.ip_addr = request.access_route[0] user_signin_log.request_user_agent = request.headers.get("User-Agent") user_signin_log.c_date = datetime.now() db.session.add(user_signin_log) db.session.commit() return True @staticmethod def check_ip_and_header_within_x_days(userid: str, days=7): """检查x天内登录过的ip地址和请求头""" sql_query = select(UserSigninLog) \ .where(UserSigninLog.userid == userid, UserSigninLog.ip_addr == request.access_route[0], UserSigninLog.request_user_agent == request.headers.get("User-Agent"), UserSigninLog.c_date >= datetime.now() - timedelta(days=days)).limit(1) user_ip_addr_log = db.session.execute(sql_query).scalar_one_or_none() if user_ip_addr_log: return True return False 请帮我建议并优化这段代码,python3.8
以下是我对这段代码的建议和优化:
1. 使用 Flask 的上下文对象获取 request 对象,避免在静态方法中使用全局变量
```python
from flask import request
class UserSigninLog(db.Model):
# ...
@staticmethod
def add_user_signin_log(userid: str, username: str):
"""新增登录日志"""
user_signin_log = UserSigninLog()
user_signin_log.userid = userid
user_signin_log.username = username
user_signin_log.ip_addr = request.access_route[0]
user_signin_log.request_user_agent = request.headers.get("User-Agent")
user_signin_log.c_date = datetime.now()
db.session.add(user_signin_log)
db.session.commit()
return True
@staticmethod
def check_ip_and_header_within_x_days(userid: str, days=7):
"""检查x天内登录过的ip地址和请求头"""
user_agent = request.headers.get("User-Agent")
ip_addr = request.access_route[0]
c_date = datetime.now() - timedelta(days=days)
user_ip_addr_log = UserSigninLog.query.filter_by(userid=userid, ip_addr=ip_addr, request_user_agent=user_agent).filter(UserSigninLog.c_date >= c_date).first()
if user_ip_addr_log:
return True
return False
```
2. 使用 SQLAlchemy 的 ORM 语法查询,避免手写 SQL 语句
```python
from sqlalchemy import and_
class UserSigninLog(db.Model):
# ...
@staticmethod
def check_ip_and_header_within_x_days(userid: str, days=7):
"""检查x天内登录过的ip地址和请求头"""
user_agent = request.headers.get("User-Agent")
ip_addr = request.access_route[0]
c_date = datetime.now() - timedelta(days=days)
user_ip_addr_log = UserSigninLog.query.filter(and_(UserSigninLog.userid == userid, UserSigninLog.ip_addr == ip_addr, UserSigninLog.request_user_agent == user_agent, UserSigninLog.c_date >= c_date)).first()
if user_ip_addr_log:
return True
return False
```
3. 让静态方法更加灵活,接收 request 对象作为参数
```python
class UserSigninLog(db.Model):
# ...
@staticmethod
def add_user_signin_log(userid: str, username: str, request):
"""新增登录日志"""
user_signin_log = UserSigninLog()
user_signin_log.userid = userid
user_signin_log.username = username
user_signin_log.ip_addr = request.access_route[0]
user_signin_log.request_user_agent = request.headers.get("User-Agent")
user_signin_log.c_date = datetime.now()
db.session.add(user_signin_log)
db.session.commit()
return True
@staticmethod
def check_ip_and_header_within_x_days(userid: str, request, days=7):
"""检查x天内登录过的ip地址和请求头"""
user_agent = request.headers.get("User-Agent")
ip_addr = request.access_route[0]
c_date = datetime.now() - timedelta(days=days)
user_ip_addr_log = UserSigninLog.query.filter(and_(UserSigninLog.userid == userid, UserSigninLog.ip_addr == ip_addr, UserSigninLog.request_user_agent == user_agent, UserSigninLog.c_date >= c_date)).first()
if user_ip_addr_log:
return True
return False
```
这些是我对这段代码的建议和优化,希望能对你有所帮助。
@app.route('/', methods=['GET','POST']) def index(): name = None form = NameForm() db.create_all() if form.validate_on_submit(): user = User.query.filter_by(username=form.name.data).first() if user is None: user = User(username=form.name.data) db.session.add(user) db.session.commit session['known'] = False if app.config['FLASKY_ADMIN']: send_email(app.config['FLASKY_ADMIN'], 'New User', 'mail/new_user', user=user) else: user = User(username=form.name.data) session['known'] = True session['name'] = form.name.data form.name.data='' return redirect(url_for('index')) send_email(['z_xinzheng@126.com'], 'Warnning', 1 , **kwargs) send_async_email(app, msg) return render_template('index.html', form=form, name=session.get('name'), known=session.get('known', False)) File "C:\Users\DELL\Desktop\flasky\hello.py", line 114, in index if app.config['FLASKY_ADMIN']: KeyError: 'FLASKY_ADMIN' 127.0.0.1 - - [23/May/2023 19:39:40] "POST / HTTP/1.1" 500 -
这个错误看起来是因为在你的 Flask 应用中没有定义 `FLASKY_ADMIN` 配置变量。你可以检查一下你的配置文件或者在应用中定义这个变量。可以在配置文件中加入以下内容:
```
import os
class Config:
# ...
FLASKY_ADMIN = os.environ.get('FLASKY_ADMIN')
# ...
```
或者在应用中直接定义:
```
app.config['FLASKY_ADMIN'] = 'your_admin_email@example.com'
```
记得将 `'your_admin_email@example.com'` 替换成你的管理员邮箱。这样,就可以通过电子邮件通知管理员了。