当 Meteor.call() 立即更新数据库时，如何延迟响应式 Meteor 模板更新 HTML 模板变量? [英] How can I delay a reactive Meteor template from updating an HTML template variable, when a Meteor.call() updates the database instantly?
问题描述
我正在开发一个基诺游戏.当用户按下开始按钮时，Meteor.Call() 会执行该卡片选择的所有内容.包括更新用户余额.我有一个中奖号码的 setTimeout，以便它们显示大约 20 秒.问题是，当拨打电话时，余额立即更新，然后数字开始显示延迟.我不熟悉如何解决这个问题.我很感激任何帮助.
I'm developing a keno game. When the user presses the start button a Meteor.Call() executes everything for that card pick. Including updating the user balance. I have a setTimeout for the winning numbers, so that they display over a period of about 20 seconds. The problem is that when the call is made, the balance updates instantly, and then the numbers start displaying with the delay. I not familiar with how to solve this. I appreciate any help.
服务器端:
Meteor.methods({
process: function(){
// generate numbers
// update user balance
}
});
客户端:
Template.keno.events({
'click #start' : function(){
Meteor.call('process',function(err,numbers){
//setTimeout on displaying numbers
// as setTimeout displays numbers, balance already updated. I need to delay
// the balance update, until all numbers are displayed.
// otherwise, the player see that they won before all numbers come out.
});
}
});
** 更新 **
我需要的唯一帮助是了解如何使 {{balance}} 之类的变量无反应，直到我完成 setTimeout，然后更新它.我应该使用会话吗?我不应该使用模板变量，而是使用 jquery 插入余额吗?这只是一个简单的解决方案，困难在于我不知道我在寻找什么功能/方法可以帮助我在设定的时间内关闭反应性，然后在 Meteor.call() 之后更新因为然后数字完成它是setTimeout.
The only help I need is to understand how to make a variable like {{balance}} unreactive, until I finish the setTimeout, and then have it update. Should I be using sessions? Should I not use a template variable and instead, insert the balance with jquery? It's just a simple solution, the difficulty is that I don't know what function / method I'm looking for that can help me turn off the reactivity for a set amount of time, and then update, after the Meteor.call() for then numbers finishes it's setTimeout.
推荐答案
如果我正确理解您的情况，您需要在您决定的时间与集合获得结果的时间设置模板 {{balance}} 表达式从服务器.所以你可以在你喜欢的时候使用 Session 来设置一个值.下面是一个例子:
If I understand your situation correctly, you need the template {{balance}} expression to be set at a time you decide vs. when the collection gets a result from the server. So you could use Session to set a value when you like. Below is an example:
<body>
{{> game}}
</body>
<template name="game">
<button id="process">Process</button>
<div>{{firstNumber}}</div>
<div>{{secondNumber}}</div>
<div>balance: {{balance}}</div>
</template>
if (Meteor.isClient) {
Template.game.events({
'click #process': function (e, tmpl) {
Meteor.call('process', function (err, result) {
Session.set('firstNumber', result[0]);
setTimeout(function () {
Session.set('secondNumber', result[1]);
Session.set('balance', result[0] + result[1]);
}, 2000);
});
}
});
Template.game.helpers({
firstNumber: function () { return Session.get('firstNumber'); },
secondNumber: function () { return Session.get('secondNumber'); },
balance: function () { return Session.get('balance'); }
});
}
if (Meteor.isServer) {
function randomNumber () {
return Math.floor(Math.random() * 100);
}
Meteor.methods({
process: function () {
return [randomNumber(), randomNumber()];
}
});
}
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