Trying to create database using Flask-SQLAlchemy

Question

Trying to create a databases using the flask-SQLAlchemy module. When I insert this code into the command line "from sqlalchemy import db". I get this error:

 Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\andre\AppData\Local\Programs\Python\Python38\sqlalchemy.py", line 1
    Python 3.8.6 (tags/v3.8.6:db45529, Sep 23 2020, 15:52:53) [MSC v.1927 64 bit (AMD64)] on win32
           ^
SyntaxError: invalid syntax. 

Here is my code:

from flask_sqlalchemy import SQLAlchemy 
from datetime import datetime
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI']= 'sqlite:///site.db'
db = SQLAlchemy(app)

class User(db.model):
    id = db.Column(db.integer, primary_key=True)
    username = db.Column(db.String(20), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)
    image_file= 
    db.Column(db.String(20),nullable=False,default='default.jpg')
    password = db.Column(db.String(60), nullabale=False)
    posts= db.relationship('Post', backref='author', lazy = True)

    def __repr__(self):
        return f"User('{self.username}', '{self.email}', 
       '{self.image_file}')"

class post(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(100), nullable=False)
    date_posted = db.Column(db.DateTime, nullable=False, 
    default=datetime.utcnow)
    content = db.Column(db.Text, nullable=False)
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'), 
    nullable=False)

    def __repr__(self):
        return f"Post('{self.title}', '{self.date_posted}')"

Could someone please help me? I've been stuck on this quite some time. I've installed flask-SQLAlchemy and updated my pip. Don't know what else to do really.

Answer 1

You had some typos in the code and not sure regarding that image_file= line so removed that line for now, follow the below code it would provide u with db

edited: didnt saw that image file one line updated it can you check

from flask_sqlalchemy import SQLAlchemy
from flask import Flask
from datetime import datetime

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'
db = SQLAlchemy(app)


class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(20), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)
    image_file=db.Column(db.String(20), nullable=False, default='default.jpg')
    password = db.Column(db.String(60), nullable=False)
    posts = db.relationship('Post', backref='author', lazy=True)

    def __repr__(self):
        return f"User('{self.username}', '{self.email}','{self.image_file}')"


class Post(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(100), nullable=False)
    date_posted = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
    content = db.Column(db.Text, nullable=False)
    user_id = db.Column(db.Integer, db.ForeignKey("user.id"), nullable=False)

    def __repr__(self):
        return f"Post('{self.title}', '{self.date_posted}')"


db.create_all()  # this create the site.db