I though I'd share some of the things I'm discovering as I'm
attempting to write a MongoDB+Pyramid application. I'm implementing a
traversal based system, which may or may not be the right approach,
but at least it forced me to start with the default pyramid_starter
template which doesn't have dependencies on ZODB or SQLAlchemy as a
startinging point.
Documentation is a bit lacking on the whole custom renderer thing,
specially with what renderers are supposed to be doing. At first I
thought I would have to be creating and using a Response object, but
it doesn't seem it's the case.
In my __init__.py file
...
#Create the application configurator
config = Configurator(root_factory=get_root, settings=settings)
# Add custom renderers
config.add_renderer('mongo_json',
'pyramidtest.renderers.MongoJSONRenderer')
# Add views
config.add_view('pyramidtest.views.json_view', name='',
renderer='mongo_json')
...
created a new renderers.py file
import json
from pymongo import json_util
class MongoJSONRenderer:
def __init__(self, info):
""" Constructor: info will be an object having the the
following attributes: name (the renderer name), package
(the package that was 'current' at the time the
renderer was registered), type (the renderer type
name), registry (the current application registry) and
settings (the deployment settings dictionary). """
def __call__(self, value, system):
""" Call a the renderer implementation with the value
and the system value passed in as arguments and return
the result (a string or unicode object). The value is
the return value of a view. The system value is a
dictionary containing available system values
(e.g. view, context, and request). """
request = system.get('request')
if request is not None:
if not hasattr(request, 'response_content_type'):
request.response_content_type =
'application/json'
return json.dumps(value, default=json_util.default)
Is this right? it seems to work, but I'm not sure it's the best way to
implement that.
oO
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