我的本地postgresql数据库URL的形式是什么? [英] What is the form of my local postgresql database url?

问题描述

我正在阅读flask/sqlalchemy教程 https://pythonhosted.org/Flask-SQLAlchemy/quickstart.html#a-minimum-application 并且我将数据库URL配置为:postgres://用户名:密码@localhost:5432/dbname

I am going through a flask/sqlalchemy tutorial https://pythonhosted.org/Flask-SQLAlchemy/quickstart.html#a-minimal-application and I configured my database url to be: postgres://username:password@localhost:5432/dbname

当我在交互式python shell中运行db.create_all()时，它不会引发任何错误，但也不会执行任何操作.

when I run db.create_all() in the interactive python shell it doesn't throw any errors, but it doesn't do anything either.

据我了解，应该创建包含三列的User表；ID，用户名和电子邮件.

From what I understand it is supposed to create the User table with three columns; id, username, and email .

from flask import Flask, url_for, render_template 
from flask.ext.sqlalchemy import SQLAlchemy

app = Flask(__name__)

app.config['SQLALCHEMY_DATABASE_URI'] = 'postgres://username:password@localhost:5432/dbname'

db = SQLAlchemy(app)


class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80), unique=True)
    email = db.Column(db.String(120), unique=True)

    def __init__(self, username, email):
        self.username = username
        self.email = email

    def __repr__(self):
        return '<User %r>' % self.username

app.debug = True



@app.route("/")
def hello():
    return render_template('hello.html')

if __name__ == "__main__":
    app.run()

推荐答案

它应该是确切的格式.

app.config['SQLALCHEMY_DATABASE_URI'] = "postgresql://postgres:postgres@localhost/DBNAME"

其中 postgres 是用户名， postgres 是密码， localhost 是地址

Where postgres is username and postgres is password, localhost is address

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