[英]mongoDB + Node update field from all documents
i need to update one field from a subdocument that appears inside other documents for all documents... 我需要从出现在所有文档的其他文档中的子文档更新一个字段...
Something like this, i have some documents like this: 像这样的东西,我有一些像这样的文件:
{
"_id": { "$oid" : "531cc2410b4ebf000036b2d7" },
"name": "ALMACEN 2",
"items": [
{
"_id": { "$oid" : "531ed4cae604d3d30df8e2ca" },
"brand": "BJFE",
"type": 0,
"color": "GDRNCCD",
"hand": 1,
"price": 500,
"model": 0,
"qty": 24
},
{
"_id": { "$oid" : "531ed4cae604d2330df8e2ca" },
"brand": "BJFE",
"type": 0,
"color": "GDRNCCD",
"hand": 1,
"price": 500,
"model": 0,
"qty": 12443
},
{
"_id": { "$oid" : "531ed22ae604d3d30df8e2ca" },
"brand": "BJFE",
"type": 0,
"color": "GDRNCCD",
"hand": 1,
"model": 0,
"price": 500,
"qty": 5
}
]
}
I want to set the qty to 0 for all documents that contains the item with _id 531ed22ae604d3d30df8e2ca 我想为包含_id 531ed22ae604d3d30df8e2ca的项目的所有文档将数量设置为0
At moment i have it 我有它
warehouses.update({$.items._id: new ObjectID(item.brand._id)}, { $set: { qty: 0}}, {safe: false, multi: true}, function (e) {
if (e) {
error(e);
return;
}
success();
});
But i think the query is not ok.. 但我认为查询不好..
您需要使用“$”位置运算符来实现此目的:
db.warehouses.update({"items._id": "531ed22ae604d3d30df8e2ca"}, { $set: { "items.$.qty":0} } )
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