Question

如果我在集合中包含此文档，我该如何进行部分插入？

集合

{
    "_id" : "123",
    "title" : "Green Tree",
    "detail" : [
        {
            "title" : "Just a title",
            "content" : "Content",
            "reference" : 456
        }
    ]
}

如果我有一个具有相同第一级标题的对象，则应该添加详细信息。所以如果我要添加这两个对象：

var newObject_1 = {
        "title" : "Green Tree",
        "detail" : [
            {
                "title" : "Just another title",
                "content" : "And another content",
                "reference" : 456
            }
        ]
    }
var newObject_2 = {
        "title" : "Red Car",
        "detail" : [
            {
                "title" : "title",
                "content" : "content",
                "reference" : 456
            }
        ]
    }
Collection.insert(newObject_1);
Collection.insert(newObject_2);

结果应为

{
    "_id" : "123",
    "title" : "Green Tree",
    "detail" : [
        {
            "title" : "Just a title",
            "content" : "Content",
            "reference" : 456
        },
        {
            "title" : "Just another title",
            "content" : "And another content",
            "reference" : 456
        }           
    ]
}
{
    "_id" : "124",
    "title" : "Red Car",
    "detail" : [
        {
            "title" : "title",
            "content" : "content",
            "reference" : 456
        }
    ]
}

如果细节内容相同，则根本不会发生任何事情。如果标题不同，我只需Collection.insert(newObject);完全添加数据。

Answer 1

也许喜欢吵架？

MyCollection.upsert(
  { name: 'green-tree' },
  { 
    $setOnInsert: { details: [] },
    $set: { 'details': yourObj.details },
  }
)

基本上，它会尝试找到提供名称的文档。如果找到它，它将执行以下选项。否则，它将插入它并执行指定的操作。

如何在集合中进行部分插入？

1 个答案: