-$schema->spec_field( name => '_id', type => $type );
-$schema->spec_field( name => '_rev', type => $type );
+my $blob_type = KinoSearch::Plan::BlobType->new( stored => 1 );
+my $string_type = KinoSearch::Plan::StringType->new;
+$schema->spec_field( name => '_id', type => $string_type );
+$schema->spec_field( name => '_rev', type => $string_type );
+$schema->spec_field( name => 'doc', type => $blob_type );