Coding⏱️ 2 min read📅 2026-06-03

How to Fix: How to update SQLAlchemy row entry?

Update SQLAlchemy row entry to increment no_of_logins field on successful login.

Quick Answer: Use `session.query(User).filter_by(username=form.username.data).first().update({'no_of_logins': session.query(User).filter_by(username=form.username.data).count()})

To update the SQLAlchemy row entry, you can utilize the `update()` method provided by SQLAlchemy. This method allows you to modify existing data in a database table.

🛑 Update Query with SQLAlchemy

  • Use the `update()` method on your User model, passing in a dictionary of column names and their new values.

Example Code:

  1. Step 1: Define the update query using the `update()` method.

Example Code:

from yourapp.models import User, form
user = User.query.filter_by(username=form.username.data).first()
if user: 
    # Update the no_of_logins field when a successful login occurs
    updated_user = User.query.filter_by(username=user.username).update({
        'no_of_logins': user.no_of_logins + 1
    })

This code snippet demonstrates how to update the `no_of_logins` field when a successful login occurs.

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