[英]Mongoose Remove key(s) from child schema (nested subdocuments)
I have two schemas defined, imageSchema and userSchema.我定义了两个模式,imageSchema 和 userSchema。 imageSchema has key postedBy: userSchema. imageSchema 有关键发布者:userSchema。 Question is shall I remove unused attributes of userSchema (like password) when nested into imageSchema, if so how to do it?问题是我应该在嵌套到 imageSchema 时删除 userSchema 的未使用属性(如密码),如果是的话怎么做?
var userSchema = new mongoose.Schema({
email: String,
password: String,
name: String,
}, {versionKey: false})
var imageSchema = new mongoose.Schema({
filePath: String,
user: userSchema,
createdAt: Date,
comments: [{body: "String", by: mongoose.Schema.Types.ObjectId}]
})
...
app.post("/upload-image", async function(req, res){
if(req.session.user_id) {
...
fileSystem.rename(oldPath, newPath, function(err2){
getUser(req.session.user_id, function(user){
delete user.password
var currentTime = new Date().getTime()
Image.create({
"filePath": newPath,
"user": user,
"createdAt": currentTime,
"comments": []
}, function(err2, data){
res.redirect("/?message=image_uploaded")
})
...
So after I created a new document of Image, I checked the database, the user field of the new Image has the attribute of password, which is not desired.所以在我创建了一个Image的新文档后,我检查了数据库,新Image的用户字段具有密码属性,这是不需要的。 "delete user.password" seems not working. “删除 user.password”似乎不起作用。 How should I delete this attribute?我应该如何删除这个属性? Shall I do it when defining the imageSchema, or remove it when posting the data (the app.post part)?我应该在定义 imageSchema 时这样做,还是在发布数据时删除它(app.post 部分)?
This can be done is multiple ways.这可以通过多种方式完成。 The way i like is to exclude the field from schema and also exclude while insertion.我喜欢的方式是从模式中排除该字段,并在插入时排除。
var imageSchema = new mongoose.Schema({
filePath: String,
user: userSchema.pick(["email", "name"]), // this will return schema with only email and name from the schema
createdAt: Date,
comments: [{body: "String", by: mongoose.Schema.Types.ObjectId}]
})
we are omitting the user here before insertion this can be also done with underscore/lodash _.omit(user, 'password')
我们在插入之前在这里省略了用户这也可以用下划线/lodash _.omit(user, 'password')
getUser(req.session.user_id, function({password, ...user}){
Image.create({
"filePath": newPath,
"user": user,
"createdAt": Date.now(),
"comments": []
})
}
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