Python sqlalchemy.orm.exc.unappedinstanceerror:Class'__内置实例&x27;未映射
我是Python新手,仍在学习基础知识。当运行我的程序时,它返回这个错误,我找不到解决这个问题的方法 我的代码如下:Python sqlalchemy.orm.exc.unappedinstanceerror:Class'__内置实例&x27;未映射,python,flask,sqlalchemy,Python,Flask,Sqlalchemy,我是Python新手,仍在学习基础知识。当运行我的程序时,它返回这个错误,我找不到解决这个问题的方法 我的代码如下: from flask_sqlalchemy import SQLAlchemy db = SQLAlchemy() ... class Illness: __tablename__ = "list_illnesses" id = db.Column(db.Integer, primary_key=True) illness = db.Column(d
from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()
...
class Illness:
__tablename__ = "list_illnesses"
id = db.Column(db.Integer, primary_key=True)
illness = db.Column(db.String, nullable=False)
def __init__(self, illness):
self.illness = illness
diseases.csv
每行仅包含一个疾病名称。我已经搜索了几个小时,但似乎找不到问题。这可能很重要
班级疾病:
不是
db.Model
的子类吗?你在使用Python 2吗?@IljaEverilä我想我在使用Python 3
import csv
import os
from flask import Flask, render_template, request
from models import *
app = Flask(__name__)
app.config["SQLALCHEMY_DATABASE_URI"] = os.getenv("DATABASE_URL")
app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
db.init_app(app)
def main():
f = open("illnesses.csv")
reader = csv.reader(f)
for name in reader:
foo = Illness(illness=name[0])
db.session.add(foo)
db.session.commit()
if __name__ == "__main__":
with app.app_context():
main()