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


Release history Release notifications

This version
History Node

0.3.0

History Node

0.2

Download files

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

Filename, size & hash SHA256 hash help File type Python version Upload date
modular_odm-0.3.0-py2.py3-none-any.whl (42.0 kB) Copy SHA256 hash SHA256 Wheel 2.7 Jul 19, 2016
modular-odm-0.3.0.tar.gz (30.7 kB) Copy SHA256 hash SHA256 Source None Jul 19, 2016

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging CloudAMQP CloudAMQP RabbitMQ AWS AWS Cloud computing Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page