Object mapper for Amazon DynamoDB
Project description
Dynamodb-mapper – a DynamoDB object mapper, based on boto.
Presentation
DynamoDB is a minimalistic NoSQL engine provided by Amazon as a part of their AWS product.
DynamoDB allows you to stores documents composed of unicode strings or numbers as well as sets of unicode strings and numbers. Each tables must define a hash key and may define a range key. All other fields are optional.
Dynamodb-mapper brings a tiny abstraction layer over DynamoDB to overcome some of the limitations with no performance compromise. It is highly inspired by the mature MoongoKit project
Full documentation: http://dynamodb-mapper.readthedocs.org/en/latest/
Report bugs: https://bitbucket.org/Ludia/dynamodb-mapper/issues
Requirements
Boto = 2.6.0
AWS account
Highlights
Python <–> DynamoDB type mapping
Deep schema definition and validation with Onctuous (new in 1.8.0)
Multi-target transaction (new in 1.6.0)
Sub-transactions (new in 1.6.2)
Migration engine (new in 1.7.0)
Smart conflict detection (new in 1.7.0)
Full low-level chunking abstraction for scan, query and get_batch
Default values
Auto-inc hash_key
Framework agnostic
Example usage
We assume you’ve correctly set your Boto credentials or use ddbmock.
Quick install
$ pip install dynamodb-mapper
If you have not yet configured Boto, you may simply
$ export AWS_ACCESS_KEY_ID=<your id key here> $ export AWS_SECRET_ACCESS_KEY=<your secret key here>
First Model
from dynamodb_mapper.model import DynamoDBModel
class DoomMap(DynamoDBModel):
__table__ = u"doom_map"
__hash_key__ = u"episode"
__range_key__ = u"map"
__schema__ = {
u"episode": int,
u"map": int,
u"name": unicode,
u"cheats": set,
}
__defaults__ = {
"cheats": set([u"Konami"]),
}
Initial Table creation
from dynamodb_mapper.model import ConnectionBorg conn = ConnectionBorg() conn.create_table(DoomMap, 10, 10, wait_for_active=True)
Model Usage
e1m1 = DoomMap()
e1m1.episode = 1
e1m1.map = 1
e1m1.name = u"Hangar"
e1m1.cheats = set([u"idkfa", u"iddqd", u"idclip"])
e1m1.save()
# Later on, retrieve that same object from the DB...
e1m1 = DoomMap.get(1, 1)
# query all maps of episode 1
e1_maps = DoomMap.query(hash_key=1)
# query all maps of episode 1 with 'map' hash_key > 5
from boto.dynamodb.condition import GT
e1_maps_after_5 = DoomMap.query(
hash_key=1,
range_key_condition=GT(5))
Contribute
Want to contribute, report a but of request a feature ? The development goes on at Ludia’s BitBucket account:
Dynamodb-mapper
Report bugs: https://bitbucket.org/Ludia/dynamodb-mapper/issues
Fork the code: https://bitbucket.org/Ludia/dynamodb-mapper/overview
Onctuous
Full documentation: https://onctuous.readthedocs.org/en/latest
Report bugs: https://bitbucket.org/Ludia/onctuous/issues
Download: http://pypi.python.org/pypi/onctuous
Release history Release notifications | RSS feed
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
File details
Details for the file dynamodb-mapper-1.8.1.tar.gz.
File metadata
- Download URL: dynamodb-mapper-1.8.1.tar.gz
- Upload date:
- Size: 26.1 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 | 8f93a15a68bde9aefda33914cb3ed62b9f819df7ba20e4153633667829cb6982 |
|
| MD5 | c359855095147d4c23da1ef84ffeee46 |
|
| BLAKE2b-256 | 7c7463425222b18532ad3b68b553fb0dddd16d6c0ca429b800a249dfce3a81af |
