0512dd4c25
The API is similar to that of PyMongo and most of the same operations are possible. The FileField can be written too with put(), write() or by using the assignment operator. All three cases are demonstrated in the tests. Metadata can be added to a FileField by assigning keyword arguments when using put() or new_file().
===========
MongoEngine
===========
:Info: MongoEngine is an ORM-like layer on top of PyMongo.
:Author: Harry Marr (http://github.com/hmarr)
About
=====
MongoEngine is a Python Object-Document Mapper for working with MongoDB.
Documentation available at http://hmarr.com/mongoengine/ - there is currently
a `tutorial <http://hmarr.com/mongoengine/tutorial.html>`_, a `user guide
<http://hmarr.com/mongoengine/userguide.html>`_ and an `API reference
<http://hmarr.com/mongoengine/apireference.html>`_.
Installation
============
If you have `setuptools <http://peak.telecommunity.com/DevCenter/setuptools>`_
you can use ``easy_install -U mongoengine``. Otherwise, you can download the
source from `GitHub <http://github.com/hmarr/mongoengine>`_ and run ``python
setup.py install``.
Dependencies
============
- pymongo 1.1+
- sphinx (optional - for documentation generation)
Examples
========
Some simple examples of what MongoEngine code looks like::
class BlogPost(Document):
title = StringField(required=True, max_length=200)
posted = DateTimeField(default=datetime.datetime.now)
tags = ListField(StringField(max_length=50))
class TextPost(BlogPost):
content = StringField(required=True)
class LinkPost(BlogPost):
url = StringField(required=True)
# Create a text-based post
>>> post1 = TextPost(title='Using MongoEngine', content='See the tutorial')
>>> post1.tags = ['mongodb', 'mongoengine']
>>> post1.save()
# Create a link-based post
>>> post2 = LinkPost(title='MongoEngine Docs', url='hmarr.com/mongoengine')
>>> post2.tags = ['mongoengine', 'documentation']
>>> post2.save()
# Iterate over all posts using the BlogPost superclass
>>> for post in BlogPost.objects:
... print '===', post.title, '==='
... if isinstance(post, TextPost):
... print post.content
... elif isinstance(post, LinkPost):
... print 'Link:', post.url
... print
...
=== Using MongoEngine ===
See the tutorial
=== MongoEngine Docs ===
Link: hmarr.com/mongoengine
>>> len(BlogPost.objects)
2
>>> len(HtmlPost.objects)
1
>>> len(LinkPost.objects)
1
# Find tagged posts
>>> len(BlogPost.objects(tags='mongoengine'))
2
>>> len(BlogPost.objects(tags='mongodb'))
1
Tests
=====
To run the test suite, ensure you are running a local instance of MongoDB on
the standard port, and run ``python setup.py test``.
Community
=========
- `MongoEngine Users mailing list
<http://groups.google.com/group/mongoengine-users>`_
- `MongoEngine Developers mailing list
<http://groups.google.com/group/mongoengine-dev>`_
- `#mongoengine IRC channel <irc://irc.freenode.net/mongoengine>`_
Contributing
============
The source is available on `GitHub <http://github.com/hmarr/mongoengine>`_ - to
contribute to the project, fork it on GitHub and send a pull request, all
contributions and suggestions are welcome!