Bummer: Create a User through /registration

from flask import Flask, flash, g, redirect, render_template, url_for, session
from flask_bcrypt import check_password_hash
from flask_login import current_user, LoginManager, login_required, login_user, logout_user

import forms
import models

DEBUG = True
PORT = 8080
HOST = '0.0.0.0'

app = Flask(__name__)
app.secret_key = 'sDb6GG7X123'

login_manager = LoginManager()
login_manager.init_app(app)
login_manager.login_view = 'login'


@login_manager.user_loader
def load_user(userid):
    try:
        return models.User.get(models.User.id == userid)
    except models.DoesNotExist:
        return None


@app.before_request
def before_request():
    g.db = models.DATABASE
    g.db.connect()
    g.user = current_user


@app.after_request
def after_request(response):
    g.db.close()
    return response


@app.route('/')
def index():
    tacos = models.Taco.select()
    return render_template('index.html', tacos=tacos)


@app.route('/registration', methods=['GET', 'POST'])
def register():
    form = forms.RegisterForm()
    if form.validate_on_submit():
        try:
            models.User.create_user(
                email=form.email.data,
                password=form.password.data
            )
        except ValueError:
            flash("Email taken", 'error')
        else:
            flash("Registered " + form.email.data, 'success')
            return redirect(url_for('index'))
    return render_template('register.html', form=form)


@app.route('/login', methods=['GET', 'POST'])
def login():
    if g.user.is_authenticated():
        return redirect(url_for('index'))
    form = forms.LoginForm()
    if form.validate_on_submit():
        try:
            user = models.User.get(models.User.email == form.email.data)
        except models.DoesNotExist:
            flash("Your email or password doesn't match", 'error')
        else:
            if check_password_hash(user.password, form.password.data):
                login_user(user)
                session['user_id'] = user.id
                flash("You've been logged in", 'success')
                return redirect(url_for('index'))
            else:
                flash("Your email or password doesn't match", 'error')
    return render_template('login.html', form=form)


@app.route('/logout')
def logout():
    logout_user()
    flash("You've been logged out", 'success')
    return redirect(url_for('index'))


@app.route('/taco', methods=['GET', 'POST'])
@login_required
def taco():
    form = forms.TacoForm()
    if form.validate_on_submit():
        models.Taco.create(
            user=g.user._get_current_object(),
            protein=form.protein.data,
            shell=form.shell.data,
            cheese=form.cheese.data,
            extras=form.extras.data,
        )
        return redirect(url_for('index'))
    return render_template('taco.html', form=form)


if __name__ == '__main__':
    models.initialize()
    #app.run(debug=DEBUG, host=HOST, port=PORT)

from flask_bcrypt import generate_password_hash
from flask_login import UserMixin
from peewee import *

DATABASE = SqliteDatabase('tacocat.db')


class User(UserMixin, Model):
    email = CharField(unique=True)
    password = CharField(max_length=50)

    class Meta:
        database = DATABASE

    @classmethod
    def create_user(cls, email, password):
        try:
            with DATABASE.transaction():
                cls.create(
                    email=email,
                    password=generate_password_hash(password))
        except IntegrityError:
            raise ValueError("User already exists")


class Taco(Model):
    user = ForeignKeyField(User, related_name='tacos')
    protein = CharField()
    shell = CharField()
    cheese = BooleanField()
    extras = TextField()

    class Meta:
        database = DATABASE


def initialize():
    DATABASE.connect()
    DATABASE.create_tables([User, Taco], safe=True)
    DATABASE.close()

from flask_wtf import Form
from wtforms import StringField, PasswordField, BooleanField, TextAreaField
from wtforms.validators import DataRequired, Email, EqualTo, Length, ValidationError

import models


def email_available(form, field):
    if models.User.select().where(models.User.email == field.data).exists():
        raise ValidationError("User with that email already exists.")


class RegisterForm(Form):
    email = StringField("Email", validators=[
            DataRequired(),
            Email(),
            email_available
        ])
    password = PasswordField("Password", validators=[
            DataRequired(),
            Length(min=4, max=50),
            EqualTo('password2', message="Passwords must match")
        ])
    password2 = PasswordField("Confirm Password", validators=[
            DataRequired()
        ])


class LoginForm(Form):
    email = StringField("Email", validators=[DataRequired(), Email()])
    password = PasswordField("Password", validators=[DataRequired()])


class TacoForm(Form):
    protein = StringField("Protein", validators=[DataRequired()], default="None")
    shell = StringField("Shell", validators=[DataRequired()])
    cheese = BooleanField("Cheese?", validators=[DataRequired()])
    extras = TextAreaField("More details", validators=[Length(max=150)])