How to update an embedded document into a nested array?

问题

I have this kind of structure into a Mongo collection :

{
  "_id": "12345678",
  "Invoices": [
    {
      "_id": "123456789",
      "Currency": "EUR",
      "DueTotalAmountInvoice": 768.3699999999999,
      "InvoiceDate": "2016-01-01 00:00:00.000",
      "Items": [
        {
          "Item": 10,
          "ProductCode": "ABC567",
          "Quantity": 1
        },
        {
          "Item": 20,
          "ProductCode": "CDE987",
          "Quantity": 1
        }
      ]
    },
    {
      "_id": "87654321",
      "Currency": "EUR",
      "DueTotalAmountInvoice": 768.3699999999999,
      "InvoiceDate": "2016-01-01 00:00:00.000",
      "Items": [
        {
          "Item": 30,
          "ProductCode": "PLO987",
          "Quantity": 1,
          "Units": "KM3"
        },
        {
          "Item": 40,
          "ProductCode": "PLS567",
          "Quantity": 1,
          "DueTotalAmountInvoice": 768.3699999999999
        }
      ]
    }
  ]
}

So I have a first object storing several Invoices and each Invoice is storing several Items. An item is an embedded document. So in relational modelisation : A customer has 1 or several Invoice An Invoice has 1 or several Item

I am facing an issue since I am trying to update a specific Item into a specific a specific Invoice. For example I want to change the quantity of the item 10 in Invoice 123456789.

How is it possible to do that in Mongodb ?

I tried :

Push statement but it doesn't seem to work for nested arrays
arrayFilters but it doesn't seem to work for embedded document in nested arrays (only simple value arrays).

Can you give me some advice about it ?

Thank you !

回答1:

As per your problem description here:

For example I want to change the quantity of the item 10 in Invoice 123456789. I just changed the Quantity to 3. You can perform any operations here as you want. You just need to take note of how I used arrayFilters here.

Try this query:

db.collection.update(
 {"_id" : "12345678"},
 {$set:{"Invoices.$[element1].Items.$[element2].Quantity":3}},
 {multi:true, arrayFilters:[ {"element1._id": "123456789"},{ 
  "element2.Item": { $eq: 10 }} ]}
)

The above query successfully executed from mongo shell (Mongo 3.6.3). And I see this result:

/* 1 */
{
"_id" : "12345678",
"Invoices" : [ 
    {
        "_id" : "123456789",
        "Currency" : "EUR",
        "DueTotalAmountInvoice" : 768.37,
        "InvoiceDate" : "2016-01-01 00:00:00.000",
        "Items" : [ 
            {
                "Item" : 10,
                "ProductCode" : "ABC567",
                "Quantity" : 3.0
            }, 
            {
                "Item" : 20,
                "ProductCode" : "CDE987",
                "Quantity" : 1
            }
        ]
    }, 
    {
        "_id" : "87654321",
        "Currency" : "EUR",
        "DueTotalAmountInvoice" : 768.37,
        "InvoiceDate" : "2016-01-01 00:00:00.000",
        "Items" : [ 
            {
                "Item" : 30,
                "ProductCode" : "PLO987",
                "Quantity" : 1,
                "Units" : "KM3"
            }, 
            {
                "Item" : 40,
                "ProductCode" : "PLS567",
                "Quantity" : 1,
                "DueTotalAmountInvoice" : 768.37
            }
        ]
    }
 ]
}

Is that what you wanted?

来源：https://stackoverflow.com/questions/49754557/how-to-update-an-embedded-document-into-a-nested-array

标签

arrays

mongodb

mongodb-query