How to select only matched sub-document of mongodb using python

Question

Document in Mongo ->

            {
             emp_id : 11
             proj_info : 
                    [{
                     proj_id : 91
                           


        

Answer 1

welcome to Stackoverflow, you can use ${project} method to reduce it to the scope of the subdocument and then you can use ${match} there, like this:

collectionObject.aggregate([
{'$match':"emp_id":'11'}},
{'$project': {"proj_info": 1}},
{'$match':"proj_id":'91'}},
{'$project': {"proj_team": 1}},
{'$match': {"member_emp_id":'55'}}])