angular-fullstack：调用没有_id的api，比如findByField

Question

我有这样的收集mongodb：

 var CategorySchema = new mongoose.Schema({
Name: String,
Description: String,
Picture: {
   type: String,
   default: 'http://placehold.it/64x64'},
Level: {
   type: Number,
   default: 1},
Owner:{
  type: Schema.ObjectId,
  ref: 'Category'}
 });

如何使用Owner获取结果，因为api只能通过_id获得结果。

Answer 1

你可以这样做：

    var owner = {ref:'Category};
    category_model.findOne({owner: owner}, 'ref', {lean: true}, function (err, owner) {
    });