Pymongoext

Pymongoext is an ORM-like Pymongo extension that adds json schema validation, index management and intermediate data manipulators. Pymongoext simplifies working with MongoDB, while maintaining a syntax very identical to Pymongo.

pymongoext.Model is simply a wrapper around pymongo.Collection. As such, all of the pymongo.Collection API is exposed through pymongoext.Model. If you don't find what you want in the pymongoext.Model API, please take a look at pymongo's Collection documentation.

Documentation is available at https://pymongoext.readthedocs.io

The code is hosted on Github https://github.com/musyoka-morris/pymongoext

Features

schema validation (which uses MongoDB JSON Schema validation)
schema-less feature
nested and complex schema declaration
untyped field support
required fields validation
default values
custom validators
operator for validation (OneOf, AllOf, AnyOf, Not)
indexes management
data manipulators (transform documents before saving and after retrieval)
Easy to create custom data manipulators
object-like results instead of dict-like. (i.e. foo.bar instead of foo['bar'])
No custom-query language or API to learn (If you know how to use pymongo, you already know how to use pymongoext)

Supported MongoDB & Python Versions

Pymongoext uses JSON Schema for validation and thus we only support MongoDB v3.6+.

Pymongoext supports python v3+. Support for python v2.7 is currently under consideration.

Installation

We recommend the use of virtualenv <https://virtualenv.pypa.io>_ and of pip <https://pip.pypa.io>_. You can then use pip install -U pymongoext.

You may also have setuptools <http://peak.telecommunity.com/DevCenter/setuptools>_ and thus you can use easy_install -U pymongoext. Another option is pipenv <https://docs.pipenv.org>_. You can then use pipenv install pymongoext to both create the virtual environment and install the package.

Alternatively, you can download the source from GitHub <https://github.com/musyoka-morris/pymongoext>_ and run python setup.py install.

Examples

Some simple examples of what pymongoext code looks like:

.. code :: python

from datetime import datetime
from pymongo import MongoClient, IndexModel
from pymongoext import *


class User(Model):
    @classmethod
    def db(cls):
        return MongoClient()['my_database_name']

    __schema__ = DictField(dict(
        email=StringField(required=True),
        name=StringField(required=True),
        yob=IntField(minimum=1900, maximum=2019)
    ))

    __indexes__ = [IndexModel('email', unique=True), 'name']

    class AgeManipulator(Manipulator):
        def transform_outgoing(self, doc, model):
            doc['age'] = datetime.now().year - doc['yob']
            return doc


# Create a user
>>> User.insert_one({'email': '[email protected]', 'name': 'Jane Doe', 'yob': 1990})

# Fetch one user
>>> user = User.find_one()

# Print the users age
>>> print(user.age)