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[英]How to define a new field in a pre-existing document in MongoDB that isn't in the schema? (Node.js)
[英]Check if mongodb document has a property that isn't defined in schema?
我正在使用findOne
找到猫鼬的文档。 我成功地使用doc.set(key, val)
将未在架构中定义的属性设置为文档。 但是,当我要检查文档是否具有该属性时,即使文档具有该属性也只是不显示。
User.findOne({email: req.user.email})
.then(user=>{
if(user.posts){
//Tried with user.has("posts")=>logs error: .has is not a function
let posts = user.get("posts");
posts.push({
"Type": "Idea",
"Field/s of idea": req.body["Field/s of idea"],
"Idea": req.body.idea,
"Date": new Date()
});
user.set("posts", posts);
}else{
user.set("posts", [{
"Type": "Idea",
"Field/s of idea": req.body["Field/s of idea"],
"Idea": req.body.idea,
"Date": new Date()
}]
);
};
user.save();
})
.catch(err=>{throw err});
架构代码:
const UserSchema = new Schema({
_id: {type: ObjectId, auto: true},
username: {type: String, required: true, max:18},
email: {type: String, required: true},
password: {type: String, required: true, min:5},
date_of_registration: {type: Date, required: true}
}, { strict: false });
模式是固定的,不是设计动态的。 如果不确定posts
将是哪种类型,请将其添加到架构中并使用Mixed
类型。
就像是
const UserSchema = new Schema({
...
posts: [ { type: Mixed, required: false } ]
}, { strict: false });
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