问题描述
我正在做一个项目，帮助我们在家喂猫。我打算实现的目标是在网站上说明猫上次被喂食的时间。如果它需要喂食某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，但还将 +1 添加到数据库上的整数，表示该按钮被点击的次数。最重要的是，将有一个计时器来检查时间，如果它是“5:00”，那么 5am 那么它会将数据库上的整数重置为 0。我已经设置了时间戳，并且已经帮助仅为时间戳设置了数据库，我似乎无法对代码进行逆向工程来生成这个整数。目前我一直在测试计时器是否工作以及在单击按钮时变量是否会更新。计时器才刚刚开始工作，并且在网页上可视化地更新变量，但是当打印到控制台时，它既不更新也不更新变量时间。为了让 while 循环与 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，因为它们不更新变量。
您能否建议我阅读的任何资源以便我学习，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","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>
解决方法
暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！
如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。
小编邮箱:dio#foxmail.com (将#修改为@）