这是代码：from flask import Flaskfrom flask import request, redirect, url_for, render_templatefrom flask_sqlalchemy import SQLAlchemyapp = Flask(__name__)app.config['SQLALCHEMY_DATABASE_URI'] = 'postgresql://postgres:root@localhost/gradelink'db = SQLAlchemy(app)class Location(db.Model): __tablename__ = 'location' id = db.Column('id', db.Integer, primary_key=True) location_name = db.Column('location_name', db.String(250), unique=True) def __init__(self, location_name): self.location_name = location_name def __repr__(self): return '<Location %r' % self.location_name@app.route('/')def index(): return render_template('home.html');@app.route('/location', methods=['GET', 'POST'])def location(): return render_template('location.html'); @app.route('/post_location', methods=['POST'])def post_location(): if request.method == "POST": location_n = request.form['location_name'] return redirect(url_for('index'))@app.route('/location_list', methods=['GET', 'POST'])def location_list(): locationList = Location.query.all() return render_template('location_list.html', locationList=locationList);if __name__ == '__main__': app.run(debug=True)我尝试了 GET 和 POST 但仍然是相同的结果：对象没有属性“数据”对象没有属性“形式”location_list 完美运行。看起来请求总是空的我的提交表单html：<!DOCTYPE html><html><head> <title>Location Form</title> <meta charset="utf-8" /></head><body> <form method="post" action="/post_location"> <label>Location name:</label> <input id="location_name" name="location_name" type="text" /> <input type="submit" /> </form></body></html>我究竟做错了什么？编辑 1：我试过这个：@app.route('/post_location', methods=['POST'])def post_location(): if request.method == "POST": location_n = request.form['location_name'] return redirect(url_for('index'))现在错误信息是：“函数”对象没有“方法”属性编辑2：我没有调用函数request，也没有很多其他函数（这是一个新的新项目）不，我的flask.py任何项目文件夹中都没有任何文件。
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