meteor - Clone MongoDB objects in Meteorjs by changing value of a single field -

i working on meteorjs application using mongodb in end. in collection there objects having common field named parent_id eg

{name:'a',parent_id:'acd'} {name:'b',parent_id:'acd'} {name:'c',parent_id:'acd'} {name:'d',parent_id:'acd'} 

i want copy these objects in database changing parent_id field eg

{name:'a',parent_id:'acdef'} {name:'b',parent_id:'acdef'} {name:'c',parent_id:'acdef'} {name:'d',parent_id:'acdef'} 

and these objects in database

{name:'a',parent_id:'acd'} {name:'b',parent_id:'acd'} {name:'c',parent_id:'acd'} {name:'d',parent_id:'acd'} {name:'a',parent_id:'acdef'} {name:'b',parent_id:'acdef'} {name:'c',parent_id:'acdef'} {name:'d',parent_id:'acdef'} 

for have find elements db have parent_id:'abc' items=db.collection.find({parent_id:'abc').fetch() , using loop have changed parent_id of each item , tried command

for(i=0;i<items.length;i++){     items[i].parent_id='abcdef';     meteor.collection.insert(item) } 

but giving me errorduplicate _id

mongodb meteor mongoid meteorite

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edited mar 24 '14 @ 9:59 neil lunn 74.2k18117128

asked mar 24 '14 @ 9:47 sajid ahmad 59411232