how to search the array with no empty value from mongodb in java?

问题

I would like to get the data tags from mongodb whose data is not null "tags" : [ ]

I tried doing $ne but no chance.

BasicDBObject searchQuery = new BasicDBObject();
searchQuery.put("tags", new BasicDBObject("$ne", []));

Any help would be appreciated.

回答1:

I solved this by using this query
searchQuery.put("tags.1", new BasicDBObject("$exists", true));

来源：https://stackoverflow.com/questions/42099824/how-to-search-the-array-with-no-empty-value-from-mongodb-in-java