1.在server-sales/lib/collections目录下创建DownloadRecords.js文件

import { Mongo } from 'meteor/mongo';
const DownloadRecords = new Mongo.Collection('downloadRecords');
DownloadRecords.schema = new SimpleSchema({
   dowoloadInfo: {
        label: '下载信息',
        type: [Object],    // 数组对象
        optional: true,  // 可选项，在插入时如果没有这个参数则dowoloadInfo必传
    },
    status: {
        label: '下载次数',
        type: Number,
        defaultValue: 0, // 设置默认值
    },
    fileName: {
        label: '文件名',
        type: String,
    },
});
DownloadRecords.attachSchema(DownloadRecords.schema);
export default DownloadRecords;

2.在server-sales/lib/index.js文件中导出所有数据表格

import DownloadRecords from './collections/DownloadRecords.js';
export default {
  DownloadRecords,
};

3.在server-sales/server/methods文件夹中新建DownloadRecord.js文件

import Collections from '/lib';
export default () => {
  // 插入一条下载记录数据
    new ValidatedMethod({
        name: 'DownloadRecords.methods.insertRecord',
        validate: null,
        run({ userId, condition }) {
            const userIds = {
                userId: userId,
                downloadAt: new Date(),
            }
            const data = Object.assign(userIds, condition);
            // Collections.GuestOrder.insert(data)
            return Collections.DownloadRecords.insert(data);
        },
    });
};

4.在server-sales/server/methods/index.js中导出方法，让前台能够调用。

import DownloadRecord from './DownloadRecord';
export default () => {
  DownloadRecord();
};

5.client（前端调用方法DownloadRecords.methods.insertRecord）,该方法在actions文件夹中

insertDownloadRecord({ _Meteor }, condition) {
     _Meteor.call('DownloadRecords.methods.insertRecord', { userId: Meteor.userId(), condition }, (err, result) => {
                console.log(err, result);
            });
        }, 

前端download（下载内容）连接服务端方法文件：server-sales/server/restapi/download 以及 server-sales/server/methods/data
前端方法以及调用报错参考以下链接。
http://www.jianshu.com/p/6a166843a62a

MongoDB基本操作（聚集集合查询）以及server端查找更新删除方法。
http://520b5e68.wiz03.com/share/s/1i2RVE0TTQNu2WoVi33UpVSn3tuVSF2w9kbu2jmrWX1EhsOK