Python Web框架Pylons中使用MongoDB的例子

from ming import schema
from ming.orm import MappedClass
from ming.orm import FieldProperty, ForeignIdProperty, RelationProperty
from ming.orm import ThreadLocalORMSession

session = None

def init_single_model(model_class):
    model_class.__mongometa__.session = session

class Page(MappedClass):
    class __mongometa__:
        session = session
        name = 'pages'

    _id = FieldProperty(schema.ObjectId)
    title = FieldProperty(str)
    content = FieldProperty(str)

def init_model(engine):
    global session
    session = ThreadLocalORMSession(doc_session=Session(engine))
    init_single_model(Page)
    MappedClass.compile_all()

def load_environment(global_conf, app_conf):

    ...

    # Create the Mako TemplateLookup, with the default auto-escaping
    config['pylons.app_globals'].mako_lookup = TemplateLookup(
        directories=paths['templates'],
        error_handler=handle_mako_error,
        module_directory=os.path.join(app_conf['cache_dir'], 'templates'),
        input_encoding='utf-8', default_filters=['escape'],
        imports=['from webhelpers.html import escape'])

    # Setup the mongodb database engine
    init_model(DataStore(config['database.uri']))

    # CONFIGURATION OPTIONS HERE (note: all config options will override
    # any Pylons config options)

    return config

import pylons.test

from .config.environment import load_environment
from . import model

log = logging.getLogger(__name__)

def setup_app(command, conf, vars):
    """Place any commands to setup wukong here"""
    # Don't reload the app if it was loaded under the testing environment
    if not pylons.test.pylonsapp:
        load_environment(conf.global_conf, conf.local_conf)

        log.info("Adding demo data.")
        page = model.Page(title='demo', content='This is for demo.')
        model.session.flush()
        log.info("Successfully set up.")