限制流星投注每天一次

问题描述

我正在关注排行榜的MeteorJS示例：

I'm following the MeteorJS example for a leaderboard here: https://www.meteor.com/examples/leaderboard

我想将投票限制为每天一次（每个IP地址）。最好的方法是什么？

I want to limit the votes to once per day (per IP address). What's the best way to do this?

推荐答案

以下解决方案假设您从排行榜示例的干净版本开始。

The following solution assumes you are starting with a clean version of the leaderboard example.

第一步：声明一个新的集合来保存IP地址和日期信息。这可以在玩家的定义下面添加。

Step one: Declare a new collection to hold IP address and date information. This can be added just below the definition of Players.

IPs = new Meteor.Collection('ips');

第二步：通过调用我们的新方法替换increment事件 givePoints 。

Step two: Replace the increment event with a call to our new method givePoints.

Template.leaderboard.events({
  'click input.inc': function() {
    var playerId = Session.get('selected_player');
    Meteor.call('givePoints', playerId, function(err) {
      if (err)
        alert(err.reason);
    });
  }
});

第三步：定义 givePoints 方法服务器（ this.connection 仅适用于服务器）。您可以通过在 Meteor.isServer 检查中的任何位置插入以下内容或在 / server 目录。

Step three: Define the givePoints method on the server (this.connection only works on the server). You can do this by inserting the following anywhere inside of the Meteor.isServer check or by creating a new file under the /server directory.

Meteor.methods({
  givePoints: function(playerId) {
    check(playerId, String);

    // we want to use a date with a 1-day granularity
    var startOfDay = new Date;
    startOfDay.setHours(0, 0, 0, 0);

    // the IP address of the caller
    ip = this.connection.clientAddress;

    // check by ip and date (these should be indexed)
    if (IPs.findOne({ip: ip, date: startOfDay})) {
      throw new Meteor.Error(403, 'You already voted!');
    } else {
      // the player has not voted yet
      Players.update(playerId, {$inc: {score: 5}});

      // make sure she cannot vote again today
      IPs.insert({ip: ip, date: startOfDay});
    }
  }
});

完整的代码可以在。

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