CODEWITHSUNDEEP
pythonsessionflasksqlalchemy
Jason Owens
Jason Owens

Reputation: 543

How do I view a session variable using Flask/Jinja2?

Can anyone tell me how I can view a session variable within flask, so that I can retreive the current logged in user? With my 'for loop' I can view all items iterated, but I need the current logged in user...

Thanks in advance

app.py

engine = create_engine('sqlite:///dude.db', echo=True)
app = Flask(__name__)
@app.route('/')
def home():
    if session.get('logged_in'):
        Session = sessionmaker(bind=engine)
        s = Session()
        user = s.query(User.username)
        for i in user:
            print i
        return render_template('index.html', user = user)
    else:
        return render_template('index.html')

Upvotes: 0

Views: 3229

Answers (1)

abigperson
abigperson

Reputation: 5372

It looks like you're confusing these two things:

The general pattern for a Flask session (e.g. signed crypto cookie using your secret key, you must have the secret_key configuration set to use these) is like this:

from flask import session, redirect, url_for, render_template


@app.route('/login/')
def login():
    # logic to sign in user
    # then set session variable
    session['profile'] = {"user_id": 5, "user_name": "Tom"}

    return redirect(url_for('main'))


@app.route('/logout/')
def logout():
    # logic to sign out user
    # clear session
    session.clear()

    return redirect(url_for('main'))


@app.route('/')
def main():
    user = None
    if 'profile' in session:
        user = session['profile']
    return render_template('index.html', user=user)

Upvotes: 1

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