使用MEAN mongoose创建新文档

Question

我是mongoose和mongodb的新手，我正在尝试在我的收藏中创建一个新文档。 我可以更新现有的或从集合中获取所有文档。 我需要根据集合创建一个新文档（我现在有一个集合）。 - createMoment函数。

var mongoose = require('mongoose');
var db = mongoose.connect('mongodb://url and pass');
var usersSchema  = require('./users_schema').usersSchema;
mongoose.model('usersM', usersSchema);
var usersAction;

mongoose.connection.once('open',function(){
  var Users = this.model('usersM');
  var query = Users.find();
  query.where('userId');

  query.exec(function(err, docs){
    usersAction = docs;
    console.log("docs: " + usersAction);
    return usersAction;
  });

});

exports.getData = function(){
  return usersAction;
};

exports.createMoment = function(_fn, _ln, _conc,_lan,_lat,cb){
  var Users = mongoose.model('usersM');
  console.log("createMoment Called");
  Users.insertOne({
        'leadRank':1,
        'adminApproval':true,
        'userFname':_fn,
        'userLname':_ln,
        "conclusion":_conc,
        'tentCoor':{'latitude' : _lat, 'longitude' : _lan}
    }, null, function(err, result) {
        assert.equal(err, null);
        console.log("Inserted a document into the users collection.");
        cb(result);
    });
};

我的架构： 我还没有传递一些字段

var mongoose = require('mongoose');
var schema = mongoose.Schema;

var usersSchema = new schema({
  campName: {type:String, required:true},
  centerCoor: [{
    latitude:{type:Number},
    longitude:{type:Number}
  }],
zoom: {type:String},
users: [{
  leadRank: {type:Number},
  adminApproval: Boolean,
  userFname: {type:String, required:true},
  userLname: {type:String, required:true},
  conclusion: {type:String},
  tentCoor: [{
    latitude:{type:Number},
    longitude:{type:Number}
  }]
}]
}, {collection: 'camps'});
exports.usersSchema = usersSchema;