[英]How to push object to array which is in another array in MongoDB?
I have a Mongoose Schema:我有一个 Mongoose 模式:
const UserSchema = new mongoose.Schema({
mail: {
type: String,
required: true
},
password: {
type: String,
required: true
},
folders: [
{
folderName: {
type: String,
default: 'Main',
required: true,
},
files: [
{
fileName: String,
fileType: String,
date: String,
filePath: String,
}
]
}
]
});
For this scheme, I would like to get the user's mail and the name of the folder from the request and add the file data to this folder, but I don't know how to push file to correct folder.对于这个方案,我想从请求中获取用户的邮件和文件夹的名称,并将文件数据添加到这个文件夹,但我不知道如何将文件推送到正确的文件夹。
I want to do this code:我想做这个代码:
const mail = req.body.mail;
const folderName = req.body.folderName;
const file = {
fileName: 'file222',
fileType: '.png',
date: '13-02-2022 21:15',
filePath: '/uploads',
}
const user = await userModel.findOne({ mail: mail });
const folders = user.folders.filter(folder => folder.folderName === folderName);
folders[0].files.push(file);
but in MongoDB, something like this:但在 MongoDB 中,是这样的:
const userFile = await userModel.updateOne(
{ mail: mail, "folders.folderName": folderName },
{
$push: {
folders: {
files: file
}
}
}
);
But I don't know how to specify that query... how can I supposed to do it?但我不知道如何指定该查询...我该怎么做?
const userFile = await userModel.updateOne(
{ mail: mail, "folders.folderName": folderName },
{
$push: {
folders.$.files: file
}
}
);
The positional $ operator identifies an element in an array to update without explicitly specifying the position of the element in the array.
位置 $ 运算符标识数组中要更新的元素,而无需显式指定数组中元素的 position。
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