Javascript Flask：在数据库中保存聊天信息
因此，我正在向我的网站添加聊天记录。为了做到这一点，我必须首先将消息和房间id保存在一个单独的类中。但是，由于某种原因，我在尝试保存这些消息时出错。有人能告诉我如何保存邮件而不出错吗？我已经把代码放在下面了。非常感谢。我之所以这么做，是因为我的另一个问题提供了解决方案。因此，如果您没有发现这方面的任何问题，请转到此处查看我的问题和提供的答案，以便进一步澄清 main.pyJavascript Flask：在数据库中保存聊天信息,javascript,python,html,flask,Javascript,Python,Html,Flask,因此，我正在向我的网站添加聊天记录。为了做到这一点，我必须首先将消息和房间id保存在一个单独的类中。但是，由于某种原因，我在尝试保存这些消息时出错。有人能告诉我如何保存邮件而不出错吗？我已经把代码放在下面了。非常感谢。我之所以这么做，是因为我的另一个问题提供了解决方案。因此，如果您没有发现这方面的任何问题，请转到此处查看我的问题和提供的答案，以便进一步澄清 main.py from flask import Flask, request, session, render_template
from flask import Flask, request, session, render_template, redirect, url_for, flash, get_flashed_messages, jsonify
from flask.globals import current_app
from flask_login import LoginManager, login_user, login_required, logout_user, current_user, UserMixin, AnonymousUserMixin
from datetime import timedelta, datetime
from werkzeug.security import generate_password_hash, check_password_hash
import sqlite3
from os import error, path
from flask_sqlalchemy import SQLAlchemy
import random
from flask_socketio import SocketIO, join_room, leave_room, emit
from flask_session import Session
app = Flask(__name__)
DB_NAME = "spark.db"
app.config["SECRET_KEY"] = "1986319249872139865432"
app.config['SQLALCHEMY_DATABASE_URI'] = f"sqlite:///{DB_NAME}"
app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
app.config['SESSION_TYPE'] = 'filesystem'
Session(app)
socketio = SocketIO(app, manage_session=False)
db = SQLAlchemy(app)
db.init_app(app)
def create_database(app):
if not path.exists(DB_NAME):
db.create_all(app=app)
print("Created Database!")
class Tutor(db.Model, UserMixin):
id = db.Column(db.Integer, primary_key=True)
user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
tremail = db.Column(db.String(10000))
trusername = db.Column(db.String(1200))
subjects = db.Column(db.String(1200))
session_length = db.Column(db.String(1200))
class Messages(db.Model, UserMixin):
id = db.Column(db.Integer, primary_key=True)
room_id = db.Column(db.String(1200), unique=True, nullable=False)
content = db.Column(db.String(10000))
class User(db.Model, UserMixin):
id = db.Column(db.Integer, primary_key=True)
email = db.Column(db.String(150), unique=True)
username = db.Column(db.String(150), unique=True)
password = db.Column(db.String(150))
tutors = db.relationship('Tutor')
create_database(app)
login_manager = LoginManager()
login_manager.login_view = 'login'
login_manager.init_app(app)
@login_manager.user_loader
def load_user(id):
return User.query.get(int(id))
@app.route("/")
@login_required
def home():
return render_template("index.html")
@app.route("/login", methods=["GET", 'POST'])
def login():
if request.method == "POST":
email = request.form.get('email')
password = request.form.get('password')
user = User.query.filter_by(email=email).first()
if user:
if check_password_hash(user.password, password):
flash('Login successful!', category="success")
login_user(user, remember=True)
return redirect(url_for("home"))
else:
flash('Incorrect password! Please try again.', category="error")
else:
flash("Account does not exist. Please register to continue.", category="error")
return render_template("login.html", user=current_user)
@app.route("/register", methods=["GET", "POST"])
def register():
if request.method == 'POST':
email = request.form.get('email')
username = request.form.get('username')
password1 = request.form.get('password1')
password2 = request.form.get('password2')
user = User.query.filter_by(email=email).first()
if user:
flash("Email already exists.", category="error")
elif len(email) < 4:
flash("Email must be greater than 3 characters.", category="error")
elif len(username) < 2:
flash("Username must be greater than 1 character.", category="error")
elif password1 != password2:
flash("Passwords do not match! Please try again.", category="error")
elif len(password1) < 8:
flash("Password must be greater than 7 characters.", category="error")
else:
new_user = User(email=email, username=username, password=generate_password_hash(password1, method='sha256'))
db.session.add(new_user)
db.session.commit()
login_user(new_user, remember=True)
flash("Account successfully created!", category="success")
return redirect(url_for('home'))
return render_template("register.html", user=current_user)
@app.route("/logout")
@login_required
def logout():
logout_user()
flash("Logged out succcessfully!", category="success")
return redirect(url_for('login'))
@app.route("/selection")
@login_required
def selection():
return render_template("selection.html")
@app.route("/tutorform", methods=['GET', 'POST'])
@login_required
def tutorform():
if request.method == 'POST':
email = request.form.get('email')
tremail = request.form.get('tremail')
trusername = request.form.get('trusername')
subjects = request.form.get('subjects')
session_length = request.form.get('session_length')
new_tutor = Tutor(user_id=current_user.id, tremail=tremail, trusername=trusername, subjects=subjects, session_length=session_length)
db.session.add(new_tutor)
db.session.commit()
flash('Entry has been saved!', category='success')
return redirect(url_for("display"))
return render_template("tutorform.html", user=current_user)
@app.route("/tutoreeform", methods=['GET', 'POST'])
@login_required
def tutoreeform():
if request.method == 'POST':
flash("Tutoree Entry Successful!", category='success')
return redirect(url_for("display"))
return render_template("tutoreeform.html")
@app.route("/display")
@login_required
def display():
users = Tutor.query.all()
return render_template("display.html", users=users)
@login_required
@app.route('/chat', methods=['GET', 'POST'])
def chat():
if(request.method=='POST'):
username = current_user.username
room = request.form['room']
#Store the data in session
session['username'] = username
session['room'] = room
return render_template('chat.html', session = session)
else:
if(current_user.username is not None):
return render_template('chat.html', session = session)
else:
return redirect(url_for('chatselection'))
class Anonymous(AnonymousUserMixin):
def __init__(self):
self.username = 'Guest'
@socketio.on('join', namespace='/chat')
@login_required
def join(message):
room = session.get('room')
join_room(room)
emit('status', {'msg': current_user.username + ' has entered the room.'}, room=room)
@socketio.on('text', namespace='/chat')
@login_required
def text(message):
room = session.get('room')
message = Messages(room_id=room, content=message)
db.session.add(message)
db.session.commit()
emit('message', {'msg': session.get('username') + ' : ' + message['msg']}, room=room)
@socketio.on('left', namespace='/chat')
@login_required
def left(message):
room = session.get('room')
leave_room(room)
session.clear()
emit('status', {'msg': current_user.username + ' has left the room.'}, room=room)
@app.route("/chatselection", methods=['GET', 'POST'])
def chatselection():
return render_template("chatselection.html")
if __name__ == '__main__':
db.create_all()
socketio.run(app, debug=True)
由于您没有提供最低限度的代码（）来测试它，我只能帮助您在哪里检查问题 根据您的代码，您的房间id是：
room\u id=db.Column（db.String（1200），unique=True，nullable=False）room = session.get('room') # HERE CHECK room_id type, what is the type of room here?
message = Messages(room_id=room, content=message)
db.session.add(message)
db.session.commit()
如果
room\u idlogin.htmlroom\u id{% extends "base.html" %}
{% block title %}SparkWIT | | Chat Selection{% endblock %}
{% block content %}
<center><h1 class="h2 mb-3 font-weight-normal" style="color: beige;">SparkWIT Babbles</h1><br><br></center>
<br>
<hr>
<form class="form-signin" action="{{url_for('chat')}}" method="POST">
<input type="text" id="room" name="room" class="form-control" placeholder="Room Code" required><br>
<button class="btn btn-lg btn-primary btn-block" value="submit">Create/Join Room</button>
</form>
<br>
{% endblock %}
<!DOCTYPE html>
<html>
<head>
<title >{% block title %}{% endblock %}</title>
<link rel= "stylesheet" type= "text/css" href= "{{ url_for('static',filename='style.css') }}">
<link rel= "stylesheet" type= "text/css" href= "{{ url_for('static',filename='bootstrap.min.css') }}">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.bundle.min.js" integrity="sha384-JEW9xMcG8R+pH31jmWH6WWP0WintQrMb4s7ZOdauHnUtxwoG2vI5DkLtS3qm9Ekf" crossorigin="anonymous"></script>
<!-- Bootstrap core JavaScript -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<!-- Plugin JavaScript -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-easing/1.4.1/jquery.easing.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/startbootstrap-stylish-portfolio@5.0.9/js/stylish-portfolio.min.js"></script>
<script type="text/javascript" src="//code.jquery.com/jquery-1.4.2.min.js"></script>
<script src="https://cdn.socket.io/3.1.3/socket.io.min.js" integrity="sha384-cPwlPLvBTa3sKAgddT6krw0cJat7egBga3DJepJyrLl4Q9/5WLra3rrnMcyTyOnh" crossorigin="anonymous"></script>
<script type="text/javascript" charset="utf-8">
var socket;
$(document).ready(function(){
socket = io.connect('http://' + document.domain + ':' + location.port + '/chat');
socket.on('connect', function() {
socket.emit('join', {});
});
socket.on('status', function(data) {
$('#chat').val($('#chat').val() + '<' + data.msg + '>\n');
$('#chat').scrollTop($('#chat')[0].scrollHeight);
});
socket.on('message', function(data) {
$('#chat').val($('#chat').val() + data.msg + '\n');
$('#chat').scrollTop($('#chat')[0].scrollHeight);
});
$('#send').click(function(e) {
text = $('#text').val();
$('#text').val('');
socket.emit('text', {msg: text});
});
});
function leave_room() {
socket.emit('left', {}, function() {
socket.disconnect();
// go back to the login page
window.location.href = "{{ url_for('display') }}";
});
}
</script>
</head>
<body style="background-image: url(https://media.istockphoto.com/photos/abstract-glittering-dna-helix-with-depth-of-field-over-dark-space-picture-id1201193016?k=6&m=1201193016&s=612x612&w=0&h=_H80RaLa4OYIiT136j_cFgm-YRHAiV4wmaSkSKAMFbQ=)">
<nav class="navbar navbar-expand-lg navbar-dark" style="background-color: #549bf773;">
<a class="navbar-brand" href="/">
<img src="{{url_for('static', filename='logo.jpg')}}" alt="" width="40">
</a>
<a class="navbar-brand" href="/" style="color: rgb(22, 9, 3);"><i><b style="font-family: fantasy; font-size: larger;">SparkWIT</b></i></a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
{% if current_user.is_authenticated %}
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="/" style="color: rgb(37, 20, 13);"><b><i>Home</i></b> <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item active">
<a class="nav-link" href="/selection" style="color: rgb(37, 20, 13);"><b><i>Selection</i></b> <span class="sr-only">(current)</span></a>
</li>
</ul>
<a class="nav-link" href="/logout"><button type="button" class="btn btn-outline-danger" style="color: rgb(0, 0, 0);"><b>Logout</b></button></a>
{% else %}
<a class="nav-link" href="/login"><button type="button" class="btn btn-outline-light"><b>Login</b></button></a>
<a class="nav-link" href="/register"><button type="button" class="btn btn-outline-warning"><b>Register</b></button></a>
{% endif %}
</div>
</nav>
{% with messages = get_flashed_messages(with_categories=true) %}
{% if messages %}
{% for category, message in messages %}
{% if category == "error" %}
<div class="alert alert-danger alter-dismissable fade show" role="alert">
{{ message }}
<button type="button" class="close" data-dismiss="alert">
<span aria-hidden="true">×</span>
</button>
</div>
{% endif %}
{% if category == "success" %}
<div class="alert alert-success alter-dismissable fade show" role="alert">
{{ message }}
<button type="button" class="close" data-dismiss="alert">
<span aria-hidden="true">×</span>
</button>
</div>
{% endif %}
{% endfor %}
{% endif %}
{% endwith %}
<div class="container">
{% block content %}{% endblock %}
</div>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>
Exception in thread Thread-32:
Traceback (most recent call last):
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\engine\base.py", line 1276, in _execute_context
self.dialect.do_execute(
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\engine\default.py", line 593, in do_execute
cursor.execute(statement, parameters)
sqlite3.InterfaceError: Error binding parameter 1 - probably unsupported type.
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "D:\Everyday_Uses\lib\threading.py", line 954, in _bootstrap_inner
self.run()
File "D:\Everyday_Uses\lib\threading.py", line 892, in run
self._target(*self._args, **self._kwargs)
File "D:\Everyday_Uses\lib\site-packages\socketio\server.py", line 680, in _handle_event_internal
r = server._trigger_event(data[0], namespace, sid, *data[1:])
File "D:\Everyday_Uses\lib\site-packages\socketio\server.py", line 704, in _trigger_event
return self.handlers[namespace][event](*args)
File "D:\Everyday_Uses\lib\site-packages\flask_socketio\__init__.py", line 283, in _handler
return self._handle_event(handler, message, namespace, sid,
File "D:\Everyday_Uses\lib\site-packages\flask_socketio\__init__.py", line 751, in _handle_event
ret = handler(*args)
File "D:\Everyday_Uses\lib\site-packages\flask_login\utils.py", line 272, in decorated_view
return func(*args, **kwargs)
File "d:\Everyday_Uses\Programming\SparkWIT\main.py", line 200, in text
db.session.commit()
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\orm\scoping.py", line 163, in do
return getattr(self.registry(), name)(*args, **kwargs)
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\orm\session.py", line 1042, in commit
self.transaction.commit()
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\orm\session.py", line 504, in commit
self._prepare_impl()
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\orm\session.py", line 483, in _prepare_impl
self.session.flush()
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\orm\session.py", line 2536, in flush
self._flush(objects)
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\orm\session.py", line 2678, in _flush
transaction.rollback(_capture_exception=True)
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\util\langhelpers.py", line 68, in __exit__
compat.raise_(
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\util\compat.py", line 182, in raise_
raise exception
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\orm\session.py", line 2638, in _flush
flush_context.execute()
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\orm\unitofwork.py", line 422, in execute
rec.execute(self)
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\orm\unitofwork.py", line 586, in execute
persistence.save_obj(
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\orm\persistence.py", line 239, in save_obj
_emit_insert_statements(
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\orm\persistence.py", line 1135, in _emit_insert_statements
result = cached_connections[connection].execute(
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\engine\base.py", line 1011, in execute
return meth(self, multiparams, params)
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\sql\elements.py", line 298, in _execute_on_connection
return connection._execute_clauseelement(self, multiparams, params)
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\engine\base.py", line 1124, in _execute_clauseelement
ret = self._execute_context(
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\engine\base.py", line 1316, in _execute_context
self._handle_dbapi_exception(
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\engine\base.py", line 1510, in _handle_dbapi_exception util.raise_(
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\util\compat.py", line 182, in raise_
raise exception
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\engine\base.py", line 1276, in _execute_context
self.dialect.do_execute(
File "C:\Users\aarya\AppData\Roaming\Python\Python39\site-packages\sqlalchemy\engine\default.py", line 593, in do_execute
cursor.execute(statement, parameters)
sqlalchemy.exc.InterfaceError: (sqlite3.InterfaceError) Error binding parameter 1 - probably unsupported type.
[SQL: INSERT INTO messages (room_id, content) VALUES (?, ?)]
[parameters: ('test', {'msg': 'gsefasd'})]
(Background on this error at: http://sqlalche.me/e/13/rvf5)
room = session.get('room') # HERE CHECK room_id type, what is the type of room here?
message = Messages(room_id=room, content=message)
db.session.add(message)
db.session.commit()