delete a record by id in flask sqlalchemy
To delete a record by ID in Flask SQLAlchemy, follow these steps:
- Import the necessary modules:
- Import the Flask module to create the Flask application.
- Import the SQLAlchemy module to interact with the database.
Import the Flask-SQLAlchemy module to integrate Flask with SQLAlchemy.
Create an instance of the Flask application:
Instantiate the Flask application using the
Flask(__name__)
syntax.Configure the database connection:
- Set the database URI using the
app.config['SQLALCHEMY_DATABASE_URI']
attribute. The URI should include the database type, username, password, host, port, and database name.
Create a SQLAlchemy object:
Create an instance of the SQLAlchemy object using the
SQLAlchemy(app)
syntax.Define a model for your database table:
- Create a class that extends the
db.Model
class. - Define the table name using the
__tablename__
attribute. Define the table columns using the appropriate data types.
Delete a record by ID:
- Retrieve the record you want to delete using the
query.get(id)
method, whereid
is the ID of the record. - If the record exists, delete it using the
db.session.delete(record)
method, whererecord
is the retrieved record. Commit the changes to the database using the
db.session.commit()
method.Run the Flask application:
- Add a route to handle the HTTP request for deleting a record by ID.
- Inside the route function, call the method to delete the record by ID.
- Return a response to indicate the success or failure of the deletion.
Note: Don't forget to handle exceptions and error cases appropriately to ensure the smooth execution of your Flask application.