I have a mongodb collection user_col
that looks like this;
[{
'Code': '557921',
'Serial': 0,
'UserName': 'morbidMacaw674005',
'_id': ObjectId('5ee328c32cd209a5f60b56f1')},
{
'Code': '127142',
'Serial': 1,
'UserName': 'jumpyChough940073',
'_id': ObjectId('5ee328c32cd209a5f60b56f2')},
{
'Code': '739173',
'Serial': 2,
'UserName': 'jumpyPretzels824773',
'_id': ObjectId('5ee328c32cd209a5f60b56f3')},
]
I want to retrieve specific fields of all documents in a mongodb collection into a list of dictionaries. Here is my code;
list(user_col.find({"UserName": 1, "Code": 1}))
However, it returns nothing. What is wrong with my code?
If I run list(user_col.find({}))
, all the documents are retrieved. I believe my code is quite close to getting it right.
I am using python 3.7, pymongo. I am also open to using mongoengine.
I will answer my own question.
list(user_col.find({}, {"UserName": 1, "Code": 1}))
The first parameter {}
was missing in the code in the question.
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