c99f5c4ec1
All connection-related functions are now in connection.py. Created a ConnectionManager class for interacting with a collection in the database. Top-level document classes have an instance of a ConnectionManager (Document.collection). Defined a 'save' method on top-level document's that uses the collection manager's '_save_document' method to save the document to the database. Added tests for CollectionManagers -- all unit tests now require a valid connection to the database, which is set up in the tests' setUp method.
49 lines
1.2 KiB
Python
49 lines
1.2 KiB
Python
from pymongo import Connection
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__all__ = ['ConnectionError', 'connect']
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_connection_settings = {
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'host': 'localhost',
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'port': 27017,
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'pool_size': 1,
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}
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_connection = None
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_db = None
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class ConnectionError(Exception):
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pass
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def _get_connection():
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global _connection
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if _connection is None:
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_connection = Connection(**_connection_settings)
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return _connection
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def _get_db():
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global _db
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if _db is None:
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raise ConnectionError('Not connected to database')
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return _db
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def connect(db=None, username=None, password=None, **kwargs):
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"""Connect to the database specified by the 'db' argument. Connection
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settings may be provided here as well if the database is not running on
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the default port on localhost. If authentication is needed, provide
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username and password arguments as well.
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"""
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global _db
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if db is None:
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raise TypeError('"db" argument must be provided to connect()')
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_connection_settings.update(kwargs)
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connection = _get_connection()
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# Get DB from connection and auth if necessary
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_db = connection[db]
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if username is not None and password is not None:
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_db.authenticate(username, password)
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