app.py

from flask import  Flask
from config import Configuration
from flask_sqlalchemy import SQLAlchemy

from flask_migrate import Migrate, MigrateCommand
from flask_script import Manager

from flask_admin import AdminIndexView
from flask_admin.contrib.sqla import ModelView
from flask_admin import Admin

from flask_security import SQLAlchemyUserDatastore
from flask_security import current_user
from flask_security import Security

from flask import redirect, url_for, request

app = Flask(__name__)
app.config.from_object(Configuration)

db = SQLAlchemy(app)

migrate = Migrate(app, db)
manager = Manager(app)
manager.add_command('db', MigrateCommand)

### Admin ###
from models import *

class  AdminMixin:
	def is_accessible(self):
		return current_user.has_role('admin')

	def inaccessible_callbask(self,name, **kwargs):
		return redirect(url_for('security.login', next = request.url))


class AdminView(AdminMixin, ModelView):
	pass


class HomeAdminView(AdminMixin, AdminIndexView):
	pass 


class BaseModelView(ModelView):
	def on_model_change(self, form, model, is_created):
			model.generate_slug()
			return super(BaseModelView, self).on_model_change(form, model, is_created)

class PostAdminView(AdminMixin, BaseModelView):
	form_columns = ['title', 'body', 'tags']
		
class TagAdminView(AdminMixin, BaseModelView):
	form_columns = ['name', 'posts']
		

admin = Admin(app, 'FlaskApp', url = '/', index_view = HomeAdminView(name = 'Home'))
admin.add_view(PostAdminView(Post, db.session))
admin.add_view(TagAdminView(Tag, db.session))



### Flask-secutity

user_datastore = SQLAlchemyUserDatastore(db, User, Role)
security = Security(app, user_datastore)