Stop casting attributes on record initialization, do it lazy in stead.

[Thorbjørn Hermansen]

After this commit (bcc02d6), orm records are keeping a copy of the hash which it loaded it's attributes from. This hash will be the source of data for embeds_many proxy, but can also be used to read and cast attributes lazy from. Right now we are casting fields on initialize (

massive_record/lib/massive_record/orm/finders.rb

Line 236 in bcc02d6

 attributes[field.name] = value.nil? ? nil : field.decode(value) 

), quite possibly doing more work than we need to do, since its unlikely that all attributes are accessed in a request.

So I think we don't need to do this, and instead do casting only in reader method, caching the casted result.

[Thorbjørn Hermansen]

Looks rather old. Closing it :-)