如何从文档中排除一些字段 [英] How to exclude some fields from the document

问题描述

  var userSchema = new Schema（{
 name：String，
 age：Number，
 _creator：Schema.ObjectId 
}）; 
 
 var User = mongoose.model（'User'，userSchema）; 
  

我想做的是创建新文档并返回给客户端，但是我想排除'创建者'字段从一个：

  app.post（'/ example.json'，function（req，res）{
 var user = new User（{name：'John'，age：45，_creator：'some ObjectId'}）; 
 user.save（function（err）{
 if（err）抛出错误; 
 
 res.json（200，{user：user}）; //如何排除_creator字段？
}）; 
}）; 
  

最后我想发送没有_creator字段的新创建的用户：

  {
 name：'John'，
 age：45 
} 
  

有没有额外的发现请求可以进行mongoose？

PS ：最好通过

解决方案

在模式级别处理这个的另一个方法是覆盖模型的JSON。

  UserSchema.methods。 toJSON = function（）{
 var obj = this.toObject（）
 delete obj.passwordHash 
 return obj 
} 
  pre> 
 
 
我遇到这个问题，寻找一种方法来排除从服务到客户端的json的密码哈希，而 select：false 破坏了我的verifyPassword函数，因为它根本没有从数据库中检索到值。
 
I have the following simple shema:
 var userSchema = new Schema({
    name : String,
   age: Number,
   _creator: Schema.ObjectId
  });

  var User = mongoose.model('User',userSchema);
What I want to do is create the new document and return to client, but I want to exclude the 'creator' field from one:
app.post('/example.json', function (req, res) {
   var user = new User({name: 'John', age: 45, _creator: 'some ObjectId'});
   user.save(function (err) {
      if (err) throw err;

      res.json(200, {user: user});     // how to exclude the _creator field?
   });
});
At the end I want to send the new created user without _creator field:
{
   name: 'John',
   age: 45
} 
Is it possible to make without extra find request to mongoose? 

P.S:It's preferable to make it by 
解决方案
Another way to handle this on the schema level is to override toJSON for the model.
UserSchema.methods.toJSON = function() {
  var obj = this.toObject()
  delete obj.passwordHash
  return obj
}
I came across this question looking for a way to exclude password hash from the json i served to the client, and select: false broke my verifyPassword function because it didn't retrieve the value from the database at all.

                        
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