(mongodb 1.4)update nest array item ,something wrong? anybody can help me？

[Tony.Zhu]

> db.foo.insert({"items":[null,null,null,null]})
> db.foo.find()
{ "_id" : ObjectId("4bac322669b89c9179dc9976"), "items" : [ null,
null, null, null ] }
> db.foo.update({_id:ObjectId("4bac322669b89c9179dc9976")},{$set:{"items.0":{itemId:1,amount:9000}}})
> db.foo.find()
{ "_id" : ObjectId("4bac322669b89c9179dc9976"), "items" :
[ { "itemId" : 1, "amount" : 9000 }, null, null, null ] }
> db.foo.update({_id:ObjectId("4bac322669b89c9179dc9976")},{$inc:{"items.0.amount":1000},$set:{"items.1":{itemId:1,amount:1}}})
> db.foo.find()
{ "_id" : ObjectId("4bac322669b89c9179dc9976"), "items" : [
{
"itemId" : 1,
"amount" : 9000
},
{
"itemId" : 1,
"amount" : 1
},
{
"amount" : 1000
},
null,
null
] }
>

I hope that the result should be
{ "_id" : ObjectId("4bac322669b89c9179dc9976"), "items" : [
{
"itemId" : 1,
"amount" : 10000
},
{
"itemId" : 1,
"amount" : 1
},
null,
null,
null
] }

[Eliot Horowitz]

this is definitely a bug - looking into

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