Login and logout views

Users will log into our blogging site using their email and password; so, before we begin building our actual login view, let's start with the LoginForm. This form will accept the username, password, and will also present a checkbox to indicate whether the site should remember me. Create a forms.py module in the app directory and add the following code:

import wtforms
from wtforms import validators
from models import User

class LoginForm(wtforms.Form):
    email = wtforms.StringField("Email",
        validators=[validators.DataRequired()])
    password = wtforms.PasswordField("Password",
        validators=[validators.DataRequired()])
    remember_me = wtforms.BooleanField("Remember me?",
        default=True)

Tip

Note that WTForms also provides an e-mail validator. However, as the documentation for this validator tells us, it is very primitive and may not capture all edge cases as full e-mail validation is actually extremely difficult.

In order to validate the user's...