python - 类型错误 : __init__() takes 1 positional argument but 3 were given

Question

我知道这个标题对于一些老问题来说看起来很熟悉，但我已经查看了每一个问题，但没有一个能解决。这是我的代码:

TypeError: __init__() takes 1 positional argument but 3 were given

Traceback (most recent call last)
File "C:\Users\hp user\virtual_flask\lib\site-packages\flask\app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Users\hp user\virtual_flask\lib\site-packages\flask\app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "C:\Users\hp user\virtual_flask\lib\site-packages\flask\app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\hp user\virtual_flask\lib\site-packages\flask\_compat.py", line 33, in reraise
raise value
File "C:\Users\hp user\virtual_flask\lib\site-packages\flask\app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "C:\Users\hp user\virtual_flask\lib\site-packages\flask\app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "C:\Users\hp user\virtual_flask\lib\site-packages\flask\app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\hp user\virtual_flask\lib\site-packages\flask\_compat.py", line 33, in reraise
raise value
File "C:\Users\hp user\virtual_flask\lib\site-packages\flask\app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "C:\Users\hp user\virtual_flask\lib\site-packages\flask\app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "C:\Users\hp user\PycharmProjects\flask123\views.py", line 19, in create
create_post = Post(my_form.title.data, my_form.text.data)
TypeError: __init__() takes 1 positional argument but 3 were given
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我的类(class)如下:

模型.py

from app import db
from datetime import datetime


class Post(db.Model):
    post_id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(100))
    text = db.Column(db.Text())
    created_time = db.Column(db.DateTime())

    def __init__(self, title, text, created_time=None):
        self.title = title
        self.text = text
        if created_time is None:
            self.created_time = datetime.utcnow()
        else:
            self.created_time = created_time

View .py

from app import app, db
from flask import render_template, request, url_for
from forms import CreateForm
from models import Post


@app.route('/')
def homepage():
    return render_template('base.html')


@app.route('/create', methods=['GET', 'POST'])
def create():
    form = CreateForm(csrf_enabled=False)
    if request.method == 'GET':
        return render_template('create.html', form=form)
    if request.method == 'POST':
        if form.validate_on_submit():
            create_post = Post(form.title.data, form.text.data)
            db.session.add(create_post)
            db.session.commit()
    return redirect(url_for('homepage'))

我已经尝试了所有可能的解决方案并检查了我的代码是否存在拼写错误。但我没有发现任何问题。

Answer 1

错误

TypeError: __init__() takes 1 positional argument but 3 were given

发生在代码处

create_post = Post(my_form.title.data, my_form.text.data)

不是将位置参数传递给 Post 对象的创建，而是传递 keyword arguments :

create_post = Post(title=my_form.title.data, text=my_form.text.data)