更新数组中的 MongoDB hash 字段名称

Question

I have a MongoDB collection with items like that:

_id: object id
h: value
w: value
v: array
     {
         p: value
         n: value
         c: array
     },
     {
     },...

I want to rename the d field of all values of all items to something else, let's say f .

How can that be done? (Basically, can it be done?)

Answer 1

For anyone who might be interested, this is exactly how I did it (MongoDB version: 3.6.3)

db.getCollection('COLLECTION_NAME').find({"v": { $exists : 1 }}).forEach(
    function( doc ){

        for( i=0; i < doc.v.length; ++i ) {
            doc.v[i].f = doc.v[i].c;
            delete doc.v[i].c;
        }

        db.getCollection('COLLECTION_NAME').update(
         { _id : doc._id }
         , doc 
        );
    }
);