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flask sqlalchemy

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Benky Lion answered on September 16, 2021 Popularity 9/10 Helpfulness 3/10

answer flask sqlalchemy

related flask flask_sqlalchemy

related flask sqlachemy

related downgrading flask sqlalchemy

flask sqlalchemy

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$ pip install -U Flask-SQLAlchemy

Popularity 9/10 Helpfulness 3/10 Language sql

Source: flask-sqlalchemy.palletsprojects.com

Tags: flask-sqlalchemy sql

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Contributed on Jul 14 2023

Benky Lion

0 Answers Avg Quality 2/10

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flask flask_sqlalchemy

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from flask import Flask, jsonify, request
from flask_sqlalchemy import SQLAlchemy

# Initialize Flask application and SQLAlchemy
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////tmp/test.db' # Configure the database URI
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False # disable the feature of flask_sqlalchemy that signals the application everytime a change is about to be made in the database
db = SQLAlchemy(app)

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True) # Define the primary key
    username = db.Column(db.String(80), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)
    posts = db.relationship('Post', backref='author', lazy=True, cascade="all, delete-orphan")

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

class Post(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(120), nullable=False)
    content = db.Column(db.String(500), nullable=False)
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)

    def __repr__(self):
        return '<Post %r>' % self.title

# Define a route that returns all users in JSON format
@app.route('/users', methods=['GET'])
def get_all_users():
    users = User.query.all()
    return jsonify([e.serialize() for e in users])

# Define a route that deletes all users
@app.route('/users', methods=['DELETE'])
def delete_all_users():
    try:
        num_rows_deleted = db.session.query(User).delete()
        db.session.commit()
        return jsonify({"message": "All users deleted successfully", "rows_deleted": num_rows_deleted})
    except:
        db.session.rollback()
        return jsonify({"message": "An error occurred while deleting users"})

# Define a route that returns a user by id
@app.route('/users/<int:id>', methods=['GET'])
def get_user_by_id(id):
    user = User.query.get(id)
    if user:
        return jsonify(user.serialize())
    else:
        return jsonify({"message": "User not found"}), 404

if __name__ == '__main__':
    db.create_all() # create the table in the database if it does not exist
    app.run(debug=True) # run the application in debug mode

Popularity 10/10 Helpfulness 5/10 Language python

Source: Grepper

Tags: flask flas

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Contributed on Jan 16 2023

Jerome Scott

0 Answers Avg Quality 2/10

flask sqlachemy

Comment

pip install flask-sqlalchemy

Popularity 10/10 Helpfulness 5/10 Language whatever

Source: pythonbasics.org

Tags: flask flas

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Contributed on Jul 10 2022

Sore Skimmer

0 Answers Avg Quality 2/10

flask sqlachemy

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from flask import Flask
from flask_sqlalchemy import SQLAlchemy

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


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

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

Popularity 10/10 Helpfulness 4/10 Language whatever

Source: flask-sqlalchemy.palletsprojects.com

Tags: flask flas

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Contributed on Jul 19 2022

Inexpensive Iguana

0 Answers Avg Quality 2/10

downgrading flask sqlalchemy

Comment

-1

#If u want to add installl a specifc version of sqlachemy 
 pip install -U Flask-SQLAlchemy==verision 
 #for example:
  pip install -U Flask-SQLAlchemy ==2.1

Popularity 10/10 Helpfulness 3/10 Language sql

Source: Grepper

Tags: flask-sqlalchemy flas

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Contributed on Sep 16 2021

Excited Eel

0 Answers Avg Quality 2/10

flask sqlalchemy

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downgrading flask sqlalchemy

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