Sanic-WTF 0.7.0

Intialization (of Sanic)

from sanic import Sanic

app = Sanic(__name__)

# either WTF_CSRF_SECRET_KEY or SECRET_KEY should be set
app.config['WTF_CSRF_SECRET_KEY'] = 'top secret!'

@app.middleware('request')
async def add_session_to_request(request):
    # setup session

Defining Forms

from sanic_wtf import SanicForm
from wtforms.fields import PasswordField, StringField, SubmitField
from wtforms.validators import DataRequired

class LoginForm(SanicForm):
    name = StringField('Name', validators=[DataRequired()])
    password = PasswordField('Password', validators=[DataRequired()])
    submit = SubmitField('Sign In')

That’s it, just subclass SanicForm and later on passing in the current request object when you instantiate the form class. Sanic-WTF will do the trick.

Form Validation

from sanic import response

@app.route('/', methods=['GET', 'POST'])
async def index(request):
    form = LoginForm(request)
    if request.method == 'POST' and form.validate():
        name = form.name.data
        password = form.password.data
        # check user password, log in user, etc.
        return response.redirect('/profile')
    # here, render_template is a function that render template with context
    return response.html(await render_template('index.html', form=form))

For more details, please see documentation.