On Thu, 2011-01-27 at 11:47 -0800, Seth wrote:
> I've bumped into an issue with using mongoengine and pyramid when
> mongoengine needs to authenticate to mongodb. My app can't connect to
> the database when using the paster server, although all the tests run
> fine.
>
>
> After a little googling, I came across this discussion which describes
> issues with mongoengine's global connection object and suggests
> wrapping the connection inside middleware.
>
>
> What would the suggested approach be in Pyramid? Would it be
> recommended to go the middleware route or would it be more "pyramidic"
> to add this sort of thing to the "new request" event?
FTR, I don't use mongoengine, but I do use Mongo with Pyramid. I set up
a database in a new request subscriber. Here's my __init__.py:
from pyramid.authentication import AuthTktAuthenticationPolicy
from pyramid.config import Configurator
from pyramid.events import subscriber
from pyramid.interfaces import INewRequest
from pyramid.security import Allow
from pyramid.security import Authenticated
from pyramid_beaker import session_factory_from_settings
import deform
from pkg_resources import resource_filename
from gridfs import GridFS
import pymongo
from gd2 import rglobals
from gd2.son import ColanderNullTransformer
from gd2.son import DecimalTransformer
from gd2.util import configure_mailer
class Root(object):
__acl__ = ((Allow, Authenticated, 'add_vendor'),)
def __init__(self, request):
self.request = request
def main(global_config, **settings):
authn_policy = AuthTktAuthenticationPolicy('klksi')
configure_mailer(settings)
config = Configurator(settings=settings,
authentication_policy=authn_policy,
root_factory=Root)
config.scan('gd2')
config.override_resource('deform:static/', 'gd2:static/')
config.add_static_view('gstatic', 'gd2:static/',
cache_max_age=86400)
config.add_static_view('dstatic', 'deform:static/',
cache_max_age=86400)
db_uri = settings['db_uri']
conn = pymongo.Connection(db_uri)
config.registry.settings['db_conn'] = conn
deform_templates = resource_filename('deform', 'templates')
gd2_widget_templates = resource_filename('gd2.views',
'templates/widget')
search_path = (gd2_widget_templates, deform_templates)
deform.Form.set_zpt_renderer(search_path)
session_factory = session_factory_from_settings(settings)
config.set_session_factory(session_factory)
config.set_renderer_globals_factory(rglobals.default_globals_factory)
config.include(add_routes)
return config.make_wsgi_app()
def add_routes(config):
config.add_route('dashboard', '/')
# .. more routes ..
@subscriber(INewRequest)
def add_mongo_db(event):
settings = event.request.registry.settings
db = settings['db_conn'][settings['db_name']]
db.add_son_manipulator(ColanderNullTransformer())
db.add_son_manipulator(DecimalTransformer())
event.request.db = db
event.request.fs = GridFS(db)
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