Fixes #42, check for child node iter before iterating over it, prevents 'ExtraWhere' object not iterable
Fixes #42, check for child node iter before iterating over it, prevents 'ExtraWhere' object not iterable

DjangoAdminHackers/johnny-cache,jmoiron/johnny-cache,DjangoAdminHackers/johnny-cache,BertrandBordage/johnny-cache