android - Java POJO not showing null fields in MongoDB -

i new in android , need ask question. have mongodb database post , get records. have pojo in app through send whole object database not showing null fields. want show data this

{    "name" : "xyz",  "logd" : null   } 

but not showing null fields @ all. tried jackson's @jsoninclude.include.always no use. have solution this. thanks.

though specifying using jackson library, can't configure mongodb store property if there null.