Trying to create a new post, but getting "AttributeError: '_AppCtxGlobals' object has no attribute 'user'"

Microsoft Windows [Version 10.0.14393]
(c) 2016 Microsoft Corporation. All rights reserved.

(social) D:\code\web-projects\social-network>python app.py
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 121-751-838
 * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)
127.0.0.1 - - [21/Aug/2017 20:50:43] "GET / HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 20:50:43] "GET /static/css/normalize.min.css HTTP/1.1" 304 -
127.0.0.1 - - [21/Aug/2017 20:50:43] "GET /static/css/main.css HTTP/1.1" 304 -
127.0.0.1 - - [21/Aug/2017 20:50:43] "GET /static/js/vendor/disTime.min.js HTTP/1.1" 304 -
127.0.0.1 - - [21/Aug/2017 20:50:43] "GET /static/js/main.js HTTP/1.1" 304 -
127.0.0.1 - - [21/Aug/2017 20:50:44] "GET /static/img/icon-power.svg HTTP/1.1" 304 -
127.0.0.1 - - [21/Aug/2017 20:50:44] "GET /static/img/icon-logo.svg HTTP/1.1" 304 -
127.0.0.1 - - [21/Aug/2017 20:50:44] "GET /favicon.ico HTTP/1.1" 404 -
127.0.0.1 - - [21/Aug/2017 20:50:48] "GET /logout HTTP/1.1" 302 -
127.0.0.1 - - [21/Aug/2017 20:50:48] "GET / HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 20:50:48] "GET /static/img/icon-profile.svg HTTP/1.1" 304 -
127.0.0.1 - - [21/Aug/2017 20:50:52] "GET /register HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 20:50:58] "GET /login HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 20:51:00] "POST /login HTTP/1.1" 302 -
127.0.0.1 - - [21/Aug/2017 20:51:00] "GET / HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 20:51:02] "GET /favicon.ico HTTP/1.1" 404 -
127.0.0.1 - - [21/Aug/2017 20:52:40] "GET /new_post HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 20:53:05] "POST /new_post HTTP/1.1" 500 -
Traceback (most recent call last):
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1997, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1985, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1540, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\_compat.py", line 33, in reraise
    raise value
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1982, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1614, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1517, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\_compat.py", line 33, in reraise
    raise value
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1612, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1598, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask_login\utils.py", line 228, in decorated_view
    return func(*args, **kwargs)
  File "D:\code\web-projects\social-network\app.py", line 105, in post
    models.Post.create(user=g.user._get_current_object(),
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\werkzeug\local.py", line 347, in __getattr__
    return getattr(self._get_current_object(), name)
AttributeError: '_AppCtxGlobals' object has no attribute 'user'
127.0.0.1 - - [21/Aug/2017 20:53:05] "GET /new_post?__debugger__=yes&cmd=resource&f=style.css HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 20:53:05] "GET /new_post?__debugger__=yes&cmd=resource&f=jquery.js HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 20:53:05] "GET /new_post?__debugger__=yes&cmd=resource&f=debugger.js HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 20:53:05] "GET /new_post?__debugger__=yes&cmd=resource&f=ubuntu.ttf HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 20:53:05] "GET /new_post?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 21:21:20] "POST /new_post HTTP/1.1" 500 -
Traceback (most recent call last):
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1997, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1985, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1540, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\_compat.py", line 33, in reraise
    raise value
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1982, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1614, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1517, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\_compat.py", line 33, in reraise
    raise value
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1612, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask\app.py", line 1598, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\flask_login\utils.py", line 228, in decorated_view
    return func(*args, **kwargs)
  File "D:\code\web-projects\social-network\app.py", line 105, in post
    models.Post.create(user=g.user._get_current_object(),
  File "C:\Users\Mlamba\Envs\social\lib\site-packages\werkzeug\local.py", line 347, in __getattr__
    return getattr(self._get_current_object(), name)
AttributeError: '_AppCtxGlobals' object has no attribute 'user'
127.0.0.1 - - [21/Aug/2017 21:21:20] "GET /new_post?__debugger__=yes&cmd=resource&f=style.css HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 21:21:20] "GET /new_post?__debugger__=yes&cmd=resource&f=jquery.js HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 21:21:20] "GET /new_post?__debugger__=yes&cmd=resource&f=debugger.js HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 21:21:21] "GET /new_post?__debugger__=yes&cmd=resource&f=ubuntu.ttf HTTP/1.1" 200 -
127.0.0.1 - - [21/Aug/2017 21:21:21] "GET /new_post?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 200 -

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

import forms
import models

DEBUG = True
PORT = 5000
HOST = '0.0.0.0'

app = Flask(__name__)
app.secret_key = b'Xd\x05]\xed[\xb5 \xdc\x88;\xd8 !I\xc7\xb5\x99\xaf?\xd5\xb0\x16\xd7'

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


@login_manager.user_loader
def load_user(userid):
    try:
        # look up a models.User instance with the id and return it
        return models.User.get(models.User.id == userid)
    except models.DoesNotExist:
        # Return None if the User doesn't exist
        return None


@app.before_first_request
def before_request():
    """
    Connect to the database before each request i.e open a connection when a request is started
    set g.db to the DATABASE variable in models and call the .connect() method
    """
    # g.db = models.DATABASE
    # g.db.connect()
    models.DATABASE.connect()
    g.user = current_user


@app.after_request
def after_request(response):
    """ Close the database connection after each request i.e close a connection when the response is delivered"""
    # g.db.close()
    models.DATABASE.close()
    return response


@app.route('/register', methods=['GET', 'POST'])
def register():
    # create an instance of the RegistrationForm from forms
    form = forms.RegistrationForm()
    if form.validate_on_submit():
        flash("You have successfully registered", "success")
        # use the models.User.create_user() method to create a new User from the form data
        models.User.create_user(
            username=form.username.data,
            email=form.email.data,
            password=form.password.data
        )
        return redirect(url_for('index'))
    # render and return the register.html template
    # In the template's context, name the RegistrationForm instance as form
    return render_template('register.html', form=form)


@app.route('/login', methods=['GET', 'POST'])
def login():
    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 and validate the user.
                # user should be an instance of your `User` class
                login_user(user)
                flash("You've successfully 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')
@login_required
def logout():
    logout_user()
    flash("You've successfully logged out", "success")
    return redirect(url_for('index'))


@app.route('/new_post', methods=['GET', 'POST'])
@login_required
def post():
    """ instantiate, process, and send PostForm to the template.
        If the form is valid after submission, create a new post object with the data
        and set the user to the current user.
    """
    form = forms.PostForm()
    if form.validate_on_submit():
        models.Post.create(user=g.user._get_current_object(),
                           content=form.content.data.strip())
        flash("Message posted! Thanks!", "success")
        return redirect(url_for("index"))
    return render_template('post.html', form=form)


@app.route('/')
def index():
    stream = models.Post.select().limit(100)
    return render_template('stream.html', stream=stream)


@app.route('/stream')
@app.route('/stream/<username>')
def stream(username=None):
    template = 'stream.html'
    if username and username != current_user.username:
        user = models.User.select().where(models.User.username**username).get()
        stream = user.posts.limit(100)
    else:
        stream = current_user.get_stream().limit(100)
        user = current_user
    if username:
        template = 'user_stream.html'
    return render_template(template, stream=stream, user=user)


if __name__ == "__main__":
    models.intialize()
    try:
        models.User.create_user(
            username='test',
            email='test@user.com',
            password='password',
            admin=True
        )
    except ValueError:
        pass
    app.run(debug=DEBUG, host=HOST, port=PORT)