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[英]Sqlalchemy AttributeError: 'NoneType' object has no attribute '_getter'
[英]AttributeError "SQLAlchemy" object has no attribute 'create'
我正在尝试使用db.create.all()
在db.create.all()
创建数据库,但出现此错误:
File "<stdin>", line 1, in <module>
AttributeError: 'SQLAlchemy' object has no attribute 'create'
我的代码:
from flask import Flask, render_template
from flask_sqlalchemy import SQLAlchemy
from datetime import datetime
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI']= 'sqlite:///posts.db'
db= SQLAlchemy(app)
class BlogPost(db.Model):
id = db.Column(db.Integer, primary_key=True)
title = db.Column(db.String(100), nullable=False )
content = db.Column(db.Text, nullable=False)
author = db.Column(db.String(20), nullable=False , default='N/A')
date_posted = db.Column(db.DateTime, nullable=False ,default= datetime.utcnow())
def __repr__(self):
return 'BlogPost' + str(self.id)
我认为它应该是db.create_all()
而不是db.create.all()
。
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