Doesn't work with active record's uniqueness validation

[zzeon]

class StripePaymentPlan < PaymentPlan
  hstore_accessor :metadata,
    stripe_id: { data_type: :string, store_key: 'sid' }
  validates_uniqueness_of :stripe_id
end

Trying to call save, I get something like:

NoMethodError: undefined method `limit' for nil:NilClass
activerecord-4.1.8/lib/active_record/validations/uniqueness.rb:65:in `build_relation'

It seems ActiveRecord actually attempts to look up the column rather than checking the hstore column, any good ways to handle this?

[zzeon]

This is more of a issue with the uniqueness validator in Rails than hstore_accessor, so I am closing this.