Aggregation with update in mongoDB

Question

I\'ve a collection with many similar structured document, two of the document looks like

Input:

{ 
    \"_id\": ObjectId(\"525c22348771ebd7b179add8\"         


        

Answer 1

After a lot of trouble, experimenting mongo shell I've finally got a solution to my question.

Psudocode:

# To get the list of customer whose score is greater than 2000
cust_to_clear=db.col.aggregate(
    {$match:{$or:[{status:'A'},{status:'B'}]}},
    {$group:{_id:'$cust_id',total:{$sum:'$score'}}},
    {$match:{total:{$gt:500}}})

# To loop through the result fetched from above code and update the clear
cust_to_clear.result.forEach
(
   function(x)
   { 
     db.col.update({cust_id:x._id},{$set:{clear:'Yes'}},{multi:true}); 
   }
)

Please comment, if you have any different solution for the same question.