Overview¶ ↑

For instructions on upgrading to newer versions, visit mongoid.org.

2.1.0 (unreleased)¶ ↑

Mongoid now requires MongoDB 1.8.x in order to properly support the #bit and #rename atomic operations.
Traditional slave support has been removed from Mongoid. Replica sets should be used in place of traditional master and slave setups.
Custom field serialization has changed. Please see

serializable for changes.

#587 Added order preference to many and many to many associations (Gregory Man)
Added ability to chain order_by statements (Gregory Man)
#961 Allow arbitrary Mongo::Connection options to pass through Mongoid::Config::Database object. (Morgan Nelson)
Enable autosave for many to many references. (Dave Krupinski)
The following explicit atomic operations have been added: Model#bit, Model#pop, Model#pull, Model#push_all, Model#rename, Model#unset.

#974 Fix attribute_present? to work correctly then attribute value is false, thanks to @nickhoffman (Gregory Man)
#960 create indexes rake task is not recognizing a lot of mongoid models because it has problems guessing their model names from filenames (Tobias Schlottke)
#874 Deleting from a M-M reference is one-sided (nickhoffman, davekrupinski)
Replace deprecated class_inheritable_hash dropped in Rails 3.1+ (Konstantin Shabanov)
Fix inconsistent state when replacing an entire many to many relation
Don’t clobber inheritable attributes when adding subclass field inheritance (Dave Krupinski)
#914 Querying embedded documents with ‘$or’ selector (Max Golovnia)
#514 Fix marshaling of documents with relation extensions (Chris Griego)

Metadata#extension now returns a Module, instead of a Proc, when an extension is defined.
#837 When allow_dynamic_fields is set to false and loading an embedded document with an unrecognized field, an exception is raised.
#963 Initializing array of embedded documents via hash regressed (Chris Griego, Morgan Nelson)
Mongoid::Config.reset resets the options to their default values.
Mongoid::Fields.defaults is memoized for faster instantiation of models.