[英]How to remove subdocument inside of a object using Mongoose
我正在嘗試使用Mongoose從Object中刪除帶有ID的子文檔。 我試圖在Moongose中使用update fucntion但是在我運行腳本后我得到狀態“Ok:1”但狀態“nModified:0”。 試圖使用以下腳本:
Page.update({"subPages._id": req.body.ID}, {"$unset":{"subPages":1}}, function (re,q) {
console.log(q);
});
此腳本從對象中刪除所有子文檔。 這是我的json:
{
"_id" : ObjectId("585a7a7c2ec07b40ecb093d6"),
"name_en" : "Head Page",
"name_nl" : "Head Page",
"slug_en" : "Head-page",
"slug_nl" : "hoofd-menu",
"content_en" : "<p>Easy (and free!) You should check out our premium features.</p>",
"content_nl" : "<p>Easy (and free!) You should check out our premium features.</p>",
"date" : ISODate("2016-12-21T12:50:04.374Z"),
"is_footerMenu" : 0,
"is_headMenu" : 0,
"visible" : 1,
"__v" : 0,
"subPages" : [
{
"content_nl" : "<p>Easy (and free!) You should check out our premium features.</p>",
"content_en" : "<p>Easy (and free!) You should check out our premium features.</p>",
"slug_nl" : "Sub-page",
"slug_en" : "Sub-page",
"name_nl" : "Subpage",
"name_en" : "Subpage",
"date" : ISODate("2016-12-21T14:58:44.733Z"),
"subPages" : [],
"is_footerMenu" : 0,
"is_headMenu" : 0,
"visible" : 1,
"_id" : ObjectId("585a98a46f657b52489087a8")
},
{
"content_nl" : "<p>Easy (and free!) You should check out our premium features.</p>",
"content_en" : "<p>Easy (and free!) You should check out our premium features.</p>",
"slug_nl" : "Subpage",
"slug_en" : "Subpage",
"name_nl" : "Subpage1",
"name_en" : "Subpage1",
"date" : ISODate("2016-12-21T14:58:54.819Z"),
"subPages" : [],
"is_footerMenu" : 0,
"is_headMenu" : 0,
"visible" : 1,
"_id" : ObjectId("585a98ae6f657b52489087a9")
}
]
}
我想刪除帶ID的子對象
585a98a46f657b52489087a8
我該怎么做?
為了從數組中刪除元素(子文檔),您需要$拉它。
Page.update({
'subPages._id': req.body.ID
}, {
$pull: { subPages: { _id: req.body.ID } }
}, function (error, result) {
console.log(result);
});
如果要刪除所有子文檔(即使子subPages
為空),可以將其值設置為空數組。
Page.update({
'subPages._id': req.body.ID
}, {
$set: { subPages: [] }
}, function (error, result) {
console.log(result);
});
希望能幫助到你。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.