Skip to main content

A Pythonic Object Data Manager

Project description

https://badge.fury.io/py/modular-odm.png https://travis-ci.org/CenterForOpenScience/modular-odm.png?branch=develop

A database-agnostic Document-Object Mapper for Python.

Install

$ pip install modular-odm

Example Usage with MongoDB

Defining Models

from modularodm import StoredObject, fields
from modularodm.validators import MinLengthValidator, MaxLengthValidator

class User(StoredObject):
    _meta = {"optimistic": True}
    _id = fields.StringField(primary=True, index=True)
    username = fields.StringField(required=True)
    password = fields.StringField(required=True, validate=[MinLengthValidator(8)])

    def __repr__(self):
        return "<User: {0}>".format(self.username)

class Comment(StoredObject):
    _meta = {"optimistic": True}
    _id = fields.StringField(primary=True, index=True)
    text = fields.StringField(validate=MaxLengthValidator(500))
    user = fields.ForeignField("User", backref="comments")

    def __repr__(self):
        return "<Comment: {0}>".format(self.text)

Setting the Storage Backend

from pymongo import MongoClient
from modularodm import storage

client = MongoClient()
db = client['testdb']
User.set_storage(storage.MongoStorage(db, collection="user"))
Comment.set_storage(storage.MongoStorage(db, collection="comment"))

Creating and Querying

>>> from modularodm.query.querydialect import DefaultQueryDialect as Q
>>> u = User(username="unladenswallow", password="h0lygrai1")
>>> u.save()
>>> comment = Comment(text="And now for something completely different.", user=u)
>>> comment2 = Comment(text="It's just a flesh wound.", user=u)
>>> comment.save()
True
>>> comment2.save()
True
>>> u = User.find_one(Q("username", "eq", "unladenswallow"))
>>> u.comment__comments
[<Comment: And now for something completely different.>, <Comment: It's just a flesh wound.>]
>>> c = Comment.find(Q("text", "startswith", "And now"))[0]
>>> c.text
'And now for something completely different.'

For more information regarding querying syntax, please visit the related readthedocs page at <http://modular-odm.readthedocs.org/en/latest/query_syntax.html>.

Migrations

TODO

Full documentation coming soon.

Development

Tests require nose, invoke, and MongoDB.

Installing MongoDB

If you are on MacOSX with homebrew, run

$ brew update
$ brew install mongodb

Running Tests

To start mongodb, run

$ invoke mongo

Run all tests with

$ invoke test

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

modular-odm-0.3.0.tar.gz (30.7 kB view hashes)

Uploaded Source

Built Distribution

modular_odm-0.3.0-py2.py3-none-any.whl (42.0 kB view hashes)

Uploaded Python 2 Python 3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page