[英]Meteor pass data from client to server
I have a registration form, and when the user clicks the submit button the value in every textbox will be sent to server to insert that data, and return true/false. 我有一个注册表单,当用户单击提交按钮时,每个文本框中的值将被发送到服务器以插入该数据,并返回true / false。
Client: 客户:
Template.cust_register.events({
'click button': function(){
var email = $('#tbxCustEmail').val();
var msg = $('#tbxCustMsg').val();
var isSuccess = insertMsg(email,msg);
if(isSuccess){
alert("Success");
}else alert("Try again");
}
});
Server: 服务器:
function insertMsg(email,msg){
Messages.insert({Email:email,Message:msg});
return true;
}
This turned out to not work. 结果证明不起作用。 How to solve this? 怎么解决这个? Many people said "use publish/subscribe", but I don't understand how to use that. 很多人说“使用发布/订阅”,但我不明白如何使用它。
First, watch the introductory screencast and read the Data and security section of the docs. 首先,观看介绍性截屏视频并阅读文档的数据和安全性部分。
Your code in a publish/subscribe model would look like this: 发布/订阅模型中的代码如下所示:
Common: 共同:
Messages = new Meteor.Collection('messages');
Client: 客户:
Meteor.subscribe("messages");
Template.cust_register.events({
'click button': function(){
var email = $('#tbxCustEmail').val();
var msg = $('#tbxCustMsg').val();
Messages.insert({Email:email,Message:msg});
}
});
Server: 服务器:
Meteor.publish("messages", function() {
return Messages.find();
});
An alternative solution is to use Meteor.call('yourMethodName')
(on the client). 另一种解决方案是使用Meteor.call('yourMethodName')
(在客户端上)。
Then, on the server, you can have 然后,在服务器上,您可以拥有
Meteor.methods({
yourMethodName: function() { /* validate input + return some data */ }
});
You can consider setting a session variable to the return value. 您可以考虑将会话变量设置为返回值。
Meteor.call('yourMethodName', function (err, data) {
if (!err) {
Session.set('myData', data);
}
});
And then in some some template... 然后在一些模板中......
Template.whatever.helpers({
messages: function() {
return Session.get('myData');
}
});
Why do all this? 为什么这一切?
1) You can explicitly deny all direct `insert/update/find` queries from the client, and force usage of pre-defined Meteor methods.
2) You can manually determine when certain data is "refreshed".
Obviously, this methodology undermines the value of the subscription/publication model, and it should only be used in cases where real-time data isn't required. 显然,这种方法破坏了订阅/发布模型的价值,它只应用于不需要实时数据的情况。
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