For a project in the university i had to build a webapp, since it was a edu-based project and i wanted to try something which diverges from the classic Apache+django+mysql approach and i built a Cherokee+pyramid+mongodb applciation. In this article ill explain how to use mongoengine, a state-of-the-art django like ORM for mongodb in your pyramid application.
First of all i think that pyramid has the best and liter interface i’ve ever seen. This will let u integrate mongodb with very small work. If u ever used mongoengine, u just need to call:
from mongoengine import connect
connect('database')
So we need to call it in our application. In pyramid all the application is initialized in the __init__.py file which has this content:
from pyramid.config import Configurator
from myproject.resources import Root
def main(global_config, **settings):
""" This function returns a Pyramid WSGI application.
"""
config = Configurator(root_factory=Root, settings=settings)
config.add_view('myproject.views.my_view',
context='myproject.resources.Root',
renderer='myproject:templates/mytemplate.pt')
config.add_static_view('static', 'myproject:static')
return config.make_wsgi_app()
You have to change it to be like:
from pyramid.config import Configurator
from myproject.resources import Root
def main(global_config, **settings):
""" This function returns a Pyramid WSGI application.
"""
config = Configurator(root_factory=Root, settings=settings)
config.add_view('myproject.views.my_view',
context='myproject.resources.Root',
renderer='myproject:templates/mytemplate.pt')
config.add_static_view('static', 'myproject:static')
#this will make mongoengine working
connect(settings['db_name'])
#this will make all the @view_config in the view working
config.scan()
return config.make_wsgi_app()
Of course u have to define your db_name in production.ini or development.ini or both in a way which looks like this:
[app:milo_app]
use = egg:milo_app
reload_templates = true
debug_authorization = false
debug_notfound = false
debug_routematch = false
debug_templates = true
default_locale_name = en
db_name = milo
That’s it, u can now use mongoengine in the resources.py and in any other file u want to create like this:
from mongoengine import *
class User(Document):
email = StringField(required=True)
first_name = StringField()
last_name = StringField()
password = StringField()
cwid = IntField()
class Comment(EmbeddedDocument):
autor = ReferenceField(User)
content = StringField()
class Genre(EmbeddedDocument):
name = StringField()
class Movie(Document):
__name__ = 'Movie'
__parent__ = Root
#movie is identified by title and year
title = StringField(required=True)
date = DateTimeField()
description = StringField()
trailer = URLField()
poster = StringField()
image = StringField()
genre = ListField(StringField())
comments = ListField(EmbeddedDocumentField(Comment))
def __str__(self):
return 'Movie(%s, %s, %s, %s, %s)' % (self.title, self.date, self.poster, self.image, self.trailer)
then in any view u can do:
Movie.objects()
User.objects()
To retrieve all the movies and all the users (in my case)
I hope this helps!
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