尝试将 CSV 文件导入在线 psql 数据库时出错

Question

错误：sqlalchemy.exc.ProgrammingError：（psycopg2.errors.UndefinedColumn）列“isbn 关系 "books" 不存在 LINE 1: INSERT INTO books (isbn, title, author, publicationyear) VAL...

PYTHON CODE: 

import csv
import os

from flask import Flask, render_template, request
from models import *
from application import DATABASE_URL

app = Flask(__name__)
app.config["SQLALCHEMY_DATABASE_URI"] = DATABASE_URL
app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
db.init_app(app)

def main():
    f = open("books.csv")
    reader = csv.reader(f, delimiter=',')
    next(reader)              # skips the top line
    for isbn, title, author, date in reader:
        book = Book(isbn = isbn, title = title, author = author, publicationyear = int(date))
        db.session.add(book)
        print(f"Added book with {isbn}, title : {title}, author: {author}, publication year: {date}.")
    print("commiting")
    db.session.commit()
    print("committed all data")

if __name__ == "__main__":
    with app.app_context():
        main()

Answer 1

看来您的模型文件可能有问题。错误是说 books 不存在，你确定你已经创建了你的书 table 吗？ db.create_all() 您的模型应该位于 table 定义所在的位置。我建议您在开始使用 Python-Flask-SQLAlchemy 之前使用 SQL 命令成为 comfortable。希望这有帮助。

尝试将 CSV 文件导入在线 psql 数据库时出错

Error when trying importing CSV file to online psql database

python

flask

psql