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annyoung
[mongodb] how to find dictionary not null 본문
{ "_id" : ObjectId("5a129bde1c6fcc3ea4d21db0"), "email" : "test@gmail.com", "name" : "test", "authType" : "google", "loc" : { "country" : "US" } }, { "_id" : ObjectId("5a129bde1c6fcc3ea4d21db0"), "email" : "test2@gmail.com", "name" : "test2", "authType" : "google", "loc" : {} }, { "_id" : ObjectId("5a129bde1c6fcc3ea4d21db0"), "email" : "test3@gmail.com", "name" : "test3", "authType" : "google", "loc" : {} }, { "_id" : ObjectId("5a129bde1c6fcc3ea4d21db0"), "email" : "test4@gmail.com", "name" : "test4", "authType" : "google", "loc" : { "country" : "US" } } |
You have to know object's dictionary key.
If you want find loc(dictionary) not null data, using next query.
db.users.find({"loc.country":{$exists:true}}) |
debug result
{ "_id" : ObjectId("5a129bde1c6fcc3ea4d21db0"), "email" : "test@gmail.com", "name" : "test", "authType" : "google", "loc" : { "country" : "US" } }, { "_id" : ObjectId("5a129bde1c6fcc3ea4d21db0"), "email" : "test4@gmail.com", "name" : "test4", "authType" : "google", "loc" : { "country" : "US" } } |
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