collection.find({"$and":[ {"cwc":{"$exists": True}}, {"cwc":{"$ne": ""}}]})
This works for me. collection.find({"cwc":{"$exists":True}}). The only difference is removed the first argument.
This query will select all documents in the inventory collection where the qty field exists and its value does not equal 5 or 15 . Null Values¶. The following examples ...
Sample code in Pymongo with comment as explanation: from pymongo import MongoClient connection = MongoClient('localhost', 27017) ...
coding: utf-8 -*- # import the MongoClient class from the library from pymongo ...
You're passing three arguments to the find method. I assume you intended to pass a filter and a projection only. Try this: collection.find({"sex":"Male", ...
The gridfs package is an implementation of GridFS on top of pymongo, exposing a file-like interface. ... Check if a file exists in this instance of GridFS. The file to ...
Mar 14, 2013 ... MongoDB findOne is orders of magnitude slower than find if you just checking whether a document exists. Learn when you should use findOne ...
file_id : "_id" of the file to delete. New in version 1.6. exists(document_or_id= None, **kwargs)¶. Check ...
Check if a file exists in this instance of GridFS . The file to check for can be specified by the value of its _id key, or by passing in a query document. A ...
Check if a file exists in this instance of GridFS. The file to check for can be specified by the value of its _id key, or by passing in a query document. A query ...