Boolean field ignored in mangoid query when creating railsadmin

I have a Mongolian model named Announcement:

class Announcement
  include Mongoid::Document
  include Mongoid::Timestamps

  field :message
  field :starts_at, type: DateTime
  field :ends_at, type: DateTime
  field :is_permanent, type: Boolean, default: false
end

      

        
        
        
      

    

Most things on this model seem to work fine:

Announcement.all.count

      

        
        
        
      

    

all ads are listed.

When I create an ad via the console:

Announcement.create(is_permanent: true, message: "Hi", starts_at: "2014-09-30", ends_at: "2014-10-30")

      

        
        
        
      

    

Announcement.where(is_permanent: true).to_a

returns it:

[#<Announcement _id: 542b5cfa53696d0656010000, created_at: 2014-10-01 01:46:34 UTC, updated_at: 2014-10-01 01:46:34 UTC, message: "Hi", starts_at: nil, ends_at: nil, is_permanent: true>]

      

        
        
        
      

    

However, when I create a declaration with a boolean field via RailsAdmin, it ends up in the database:

[#<Announcement _id: 542b4eae53696d0552000000, created_at: 2014-10-01 00:45:34 UTC, updated_at: 2014-10-01 01:12:07 UTC, message: "Cookies!", starts_at: nil, ends_at: nil, is_permanent: "1">]

      

        
        
        
      

    

and is_perantent "1"

.

As a result, the request is_permanent: true

does not return this ad.

Is this a bug with rails-admin? Am I missing something with my setup? Any help / thoughts are appreciated.