Create string attributes that behave like rails enums
gem install readable_enums
Include the ReadableEnums module in the models you want to use it in, or in your base model.
class ModelName < ActiveRecord::Base
include ReadableEnums
end
Add enum-like behavior to any existing string attribute by using the readable_enums method.
readable_enums :status, [:active, :inactive, :pending]
ReadableEnums gives you enum-like methods and validations!
> model = ModelName.active.first
ModelName Load (10.5ms) SELECT "model_names".* FROM "model_names" WHERE "model_names"."status" = $1 LIMIT 1[["status", "active"]]
> model.inactive?
=> false
> model.active?
=> true
> model.pending!
BEGIN
COMMIT
> model.pending?
=> true
> model.update(status: 'ending')
BEGIN
ROLLBACK
> model.errors.first
=> [:status, "ending is not a valid status"]
allow_nil (default false): allow nil values in your enum column
readable_enums :status, [:active, :inactive, :pending], allow_nil: true
if (default true): only validate the string attribute if the conditional returns true
readable_enums :status, [:active, :inactive, :pending], if: :validate?
def validate?
...
end
with_scopes (default true): prevent scopes from being setup for your enum values if you don't need them, or want to define them yourself
readable_enums :status, [:active, :inactive, :pending], with_scopes: false
scope :active, -> { where(status: :active).sort_by(&:created_at) }