The Peewee database wrapper provides a thin layer of integration between flask apps and the peewee orm.
from flask import Flask
from peewee import *
from flaskext.db import Database
DATABASE = {
'name': 'example.db',
'engine': 'peewee.SqliteDatabase',
}
app = Flask(__name__)
app.config.from_object(__name__) # load database configuration from this module
# instantiate the db wrapper
db = Database(app)
# start creating models
class Blog(db.Model):
name = CharField()
# .. etc
The database wrapper is important because it ensures that a database connection is created for every incoming request, and closed upon request completion. It also provides a subclass of Model which works with the database specified in your app’s configuration.