Question

集合是主集合

var FeedsSchema = new mongoose.Schema({
  categoryName: {
    type: String,
    unique: true,
    required: true,
    ref: 'feeds',
    trim: true
  },
  categoryLogo: {
    type: String,
    unique: false,
    required: true,
    trim: true
  },
  status:{
      type: String,
      required: true,
  },
  date:{
      type: String,
      required:true
  }
});
var categories = mongoose.model('categories', FeedsSchema);
module.exports = categories;

集合是儿童集合

var UserSchema = new mongoose.Schema({
  user_id: {
    type: String,
    ref: 'user',
    required: true,
    trim: true
  },
  preferences :{
    type: String,
    required: true,
    ref: 'categories',
    trim: true
  },
  status :{
    type: String,
    required: true,
    trim: true
  }
});
var Preferences = mongoose.model('preferences', UserSchema);
module.exports = Preferences;

需要显示主集合中的所有值＆amp;需要在主要区域中推送相关字段以显示它在第二个集合中 请建议实施该方法的相关方法

Answer 1

声明

Schema = mongoose.Schema;

将首选项的类型设置为Schema.ObjectId而不是String。现在，当您选择用户列表或用户byId或..填充首选项属性时例如：User.find().populate('preferences') ..... 你可以找到mongoose populate

的例子

使用mongoose加入mongoodb的收藏

1 个答案: