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我正在做一个有助于在家喂养我们的猫的项目。我打算实现的是在它说明猫最后一次喂食的网站上。如果它需要喂食，有人可以按下这个按钮，它会做两件事。它将时间添加到数据库，但也将 +1 添加到数据库中的整数上，以表示单击此按钮的次数。最重要的是，将有一个计时器来检查时间，如果是“5:00”，那么凌晨 5 点，它将在数据库中将整数重置为 0。我已经设置了时间戳，并且已经帮助设置了仅用于时间戳的数据库，我似乎无法对代码进行逆向工程来制作这个整数。目前我一直在测试计时器是否工作以及单击按钮时变量是否会更新。计时器现在才刚刚工作，并且在网页上视觉上它会更新变量，但是当打印到控制台时它不会更新，也不会更新变量时间。为了让 while 循环与侧面的 Flask 服务器一起工作，我设置了一个多进程，但我认为它没有正确设置，因为它们没有更新变量。

您能否建议我阅读任何资源以便我可以学习，或者您是否可以看到任何错误？任何帮助将不胜感激！:)

我的 main.py 文件

from flask import Flask, flash, request, render_template, redirect, url_for
from flask_sqlalchemy import SQLAlchemy #this is the database to store that most recent click
app = Flask(__name__) #creates the flask app
from datetime import *
from multiprocessing import Process, Value
import time

db = SQLAlchemy()

var = 0

def timer():
    global var
    while True:
            now = datetime.now()
            current_time = now.strftime('%H:%M')
            print(current_time)
            print(var)
            time.sleep(5)
            if str(current_time) == '12:00':
                var = 0
                print(var)
                print("Resetting")
                time.sleep(5)
                return var

class ClickTime(db.Model):
    id = db.Column(db.INTEGER, primary_key=True)
    times= db.Column(db.String())

app.config['SECRET_KEY'] = 'keppThis secret'

app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///data.db' #this sets the name of the database file
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False

db.init_app(app) #connect the db to the flask app

db.create_all(app=app) #<--run this code once to create the database file
#when created you can block this code out


@app.route("/", methods=["POST", "GET"])
def index():
    global var
    lastedClick = ClickTime.query.first() #this will get the last time the button has been click in the db if there is nothing in db it will return None
    try:
        lastedClick = lastedClick.times #This will get the time
    except:
        lastedClick = "Has not yet been clicked" # if nothing exists this will show up

    return render_template("index.html", clickTime = lastedClick, timed=var) #renders the html page with clicktime as a variable


@app.route("/click", methods=["POST", "GET"])
def click():
    global var,time
    var += 1
    print(var)

    #this code below gets the current time

    day = time.strftime('%a')
    hour = time.strftime('%H')
    min =  time.strftime('%M')

    timern = f"{day}:{hour}:{min}"

    timeInString = f"at {timern}"
    #timeInString will look like this:
    #may 13, 2021 at 11:32 34secs
    if ClickTime.query.count() == 0: #if nothing is in database
        newClick = ClickTime(times=timeInString) #it will add clicktime to database with time
        db.session.add(newClick)

    else:
       editClick = ClickTime.query.first() #if something in database
       editClick.times = timeInString #it will edit time of the intance

    db.session.commit() #commit new changed to db
    #note: at all time there will at most be one row in databse
    return redirect(url_for("index")) #redirects to the "index" function

if __name__=='__main__':
    p = Process(target=timer)
    p.start()
    app.run(host='0.0.0.0', debug=True) #runs the app
    p.join

模板/index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>PFC</title>
    <link href='../static/css/main.css' rel='stylesheet' type='text/css'/>
</head>
<body>
<center>
<h1>Stitch was last fed at:<br>
{{clickTime}}</h1>

<h1>{{timed}}</h1>
<form method="POST" action="/click">
    <input type="submit" value="Feeding"/>
</center>
</form>
</body>
</html>
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