这是我的“用户”数据库的外观:
{
"_id" : ObjectId("5f1408d3c0e8c130503daafd"),
"username" : "Akhil Jagga",
"data" : [
{
"_id" : ObjectId("5f15cde9329fc9300c7f3843"),
"nameOfList" : "home",
"items" : [
{
"_id" : ObjectId("5f15cde9329fc9300c7f3844"),
"nameOfItem" : "this is the list item"
}
]
},
{
"_id" : ObjectId("5f15cebd9a97051d80c6c6ad"),
"nameOfList" : "personal",
"items" : [
{
"_id" : ObjectId("5f15cebd9a97051d80c6c6ae"),
"nameOfItem" : "this is the list item"
},
{
"_id" : ObjectId("5f15cfd0d73dc330dc8e7fd1"),
"nameOfItem" : "lol"
}
]
}
],
"__v" : 48
}
我想使用nodejs中的猫鼬从“项目”数组中删除特定对象,例如ObjectId(“ 5f15cebd9a97051d80c6c6ae”)。
我尝试编写以下代码,但它不起作用:
app.post("/delete", redirectLogin, function(req, res) {
const checkedItemId = req.body.checkbox;
const checkedItemName = req.body.hiddenInput;
const listName = req.body.listName;
console.log("item id: " + checkedItemId);
User.findOneAndUpdate(
{
username: req.session.userId
},
{
$pull: {
data: {
items: {
_id: checkedItemId
}
}
}
},
function(err, foundList) {
console.log(foundList);
res.redirect("/");
});
});
谢谢您的时间。
答案 0 :(得分:0)
尝试一下,
const username = req.session.userId;
const listName = req.body.listName;
const checkedItemId = req.body.checkbox;
User.update({ "username": username}, { "$pull": { `data.${listName}.items`: { "_id": checkedItemId } }}, { safe: true, multi:true }, function(err, obj) {
//do rest
});