MongoEngine 0.6 發布，用于Python訪問 MongoDB 數據庫

MongoEngine 0.6 發布了，MongoEngine由Python語言寫成，提供一個很類似Django ORM的API 用于訪問 MongoDB 數據庫。

詳細的改進記錄：

• Added FutureWarning to inherited classes not declaring ‘allow_inheritance’ as the default will change in 0.7
• Added support for covered indexes when inheritance is off
• No longer always upsert on save for items with a ‘_id’
• Error raised if update doesn’t have an operation
• DeReferencing is now thread safe
• Errors raised if trying to perform a join in a query
• Updates can now take __raw__ queries
• Added custom 2D index declarations
• Added replicaSet connection support
• Updated deprecated imports from pymongo (safe for pymongo 2.2)
• Added uri support for connections
• Added scalar for efficiently returning partial data values (aliased to values_list)
• Fixed limit skip bug
• Improved Inheritance / Mixin
• Added sharding support
• Added pymongo 2.1 support
• Fixed Abstract documents can now declare indexes
• Added db_alias support to individual documents
• Fixed GridFS documents can now be pickled
• Added Now raises an InvalidDocumentError when declaring multiple fields with the same db_field
• Added InvalidQueryError when calling with_id with a filter
• Added support for DBRefs in distinct()
• Fixed issue saving False booleans
• Fixed issue with dynamic documents deltas
• Added Reverse Delete Rule support to ListFields - MapFields aren’t supported
• Added customisable cascade kwarg options
• Fixed Handle None values for non-required fields
• Removed Document._get_subclasses() - no longer required
• Fixed bug requiring subclasses when not actually needed
• Fixed deletion of dynamic data
• Added support for the $elementMatch operator
• Added reverse option to SortedListFields
• Fixed dereferencing - multi directional list dereferencing
• Fixed issue creating indexes with recursive embedded documents
• Fixed recursive lookup in _unique_with_indexes
• Fixed passing ComplexField defaults to constructor for ReferenceFields
• Fixed validation of DictField Int keys
• Added optional cascade saving
• Fixed dereferencing - max_depth now taken into account
• Fixed document mutation saving issue
• Fixed positional operator when replacing embedded documents
• Added Non-Django Style choices back (you can have either)
• Fixed __repr__ of a sliced queryset
• Added recursive validation error of documents / complex fields
• Fixed breaking during queryset iteration
• Added pre and post bulk-insert signals
• Added ImageField - requires PIL
• Fixed Reference Fields can be None in get_or_create / queries
• Fixed accessing pk on an embedded document
• Fixed calling a queryset after drop_collection now recreates the collection
• Add field name to validation exception messages
• Added UUID field
• Improved efficiency of .get()
• Updated ComplexFields so if required they won’t accept empty lists / dicts
• Added spec file for rpm-based distributions
• Fixed ListField so it doesnt accept strings
• Added DynamicDocument and EmbeddedDynamicDocument classes for expando schemas