Internal Name Helper for Active Model

Pre-Load all records from database, then generate helper methods.

For example

There are 3 plans in the Plan model

internal_name lite standard pro

The following methods will be generated

Plan.lite
Plan.standard
Plan.pro

plan.is_lite?
plan.is_not_lite?
plan.is_standard?
plan.is_not_standard?
plan.is_pro?
plan.is_not_pro?