Adds various #where_assoc_* methods to ActiveRecord to make it easy to do correct conditions on the associations of the model being queried.

In ActiveRecord, allows you to query the association of the records that your current query would return. If you need the comments of some posts: `Post.where(...).follow_assoc(:comments)`. You can then chain `where` on the comments.

ActiveSupport Cache Store for DynamoDb

The eno standard library

For now this is tailored to my needs, so this may or may not be of any use.

Uses atomic writes to DynamoDB to ensure you hold an exclusive lock on your records

Provides apis for extracting common metadata out of files as well as low level apis for advanced metadata parsing. Currently exif (jpeg/jpg) is almost entirely supported and mpeg4 (mp4,m4v,moov...) has limited support. For common metadata the FileInfo class provides methods names after the metada...