Question

我有新帖子时需要通过电子邮件通知所有用户

服务器/ methods.js

Meteor.methods({
  sendNewsletter: function(doc) {
    var pipeline = [
      {$group: {_id:"$emails.address"}}
    ];
    var to = Meteor.users.aggregate(pipeline);
    var text = "Title: " + doc.title + "\n\n"
            + "Summary: " + doc.summary + "\n\n\n\n"

    this.unblock();

    // Send the e-mail
    Email.send({
        to: to,
        from: "noreply@domain.com",
        subject: "MyApp - " + doc.title,
        text: text
    });
  }
});

当我在客户端调用sendNewsletter方法时，我在终端上收到以下警告：

I20151030-04:16:42.039(7)? Exception while invoking method 'sendNewsletter' RecipientError: Can't send mail - all recipients were rejected
I20151030-04:16:42.041(7)?     at Object.Future.wait (/Users/user/.meteor/packages/meteor-tool/.1.1.9.1f0n2l1++os.osx.x86_64+web.browser+web.cordova/mt-os.osx.x86_64/dev_bundle/server-lib/node_modules/fibers/future.js:398:15)
I20151030-04:16:42.042(7)?     at smtpSend (packages/email/email.js:86:1)
I20151030-04:16:42.042(7)?     at Object.Email.send (packages/email/email.js:176:1)
I20151030-04:16:42.043(7)?     at maybeAuditArgumentChecks (livedata_server.js:1692:12)
I20151030-04:16:42.043(7)?     at livedata_server.js:708:19
I20151030-04:16:42.043(7)?     at [object Object]._.extend.withValue (packages/meteor/dynamics_nodejs.js:56:1)
I20151030-04:16:42.044(7)?     at livedata_server.js:706:40
I20151030-04:16:42.044(7)?     at [object Object]._.extend.withValue (packages/meteor/dynamics_nodejs.js:56:1)
I20151030-04:16:42.044(7)?     at livedata_server.js:704:46
I20151030-04:16:42.044(7)?     - - - - -
I20151030-04:16:42.045(7)?     at SMTPClient._actionRCPT (/Users/user/.meteor/packages/email/.1.0.7.11df8pa++os+web.browser+web.cordova/npm/node_modules/simplesmtp/lib/client.js:909:27)
I20151030-04:16:42.045(7)?     at SMTPClient._onData (/Users/user/.meteor/packages/email/.1.0.7.11df8pa++os+web.browser+web.cordova/npm/node_modules/simplesmtp/lib/client.js:329:29)
I20151030-04:16:42.045(7)?     at CleartextStream.emit (events.js:95:17)
I20151030-04:16:42.045(7)?     at CleartextStream.<anonymous> (_stream_readable.js:765:14)
I20151030-04:16:42.046(7)?     at CleartextStream.emit (events.js:92:17)
I20151030-04:16:42.046(7)?     at emitReadable_ (_stream_readable.js:427:10)
I20151030-04:16:42.046(7)?     at _stream_readable.js:420:7
I20151030-04:16:42.046(7)?     at process._tickCallback (node.js:448:13)

有谁知道如何向多个收件人发送电子邮件？谢谢你,,,,

Answer 1

重新编写server/methods.js文件，让to变量保存一组电子邮件地址。由于Meteor不支持MongoDB（尚未），你可以简单地在mongo shell中使用db.users.distinct("emails.address")，你可以改为

在underscore.js库中使用三种方法 map() ， flatten() 和 uniq() 从用户集合中获取不同的电子邮件地址。

首先使用光标上的 .find() 将 .fetch() 返回的Meteor光标转换为数组。例如：

var users = Users.find({}, { fields: {"emails": true} }).fetch();

然后使用 map() 方法，通过转换函数（iteratee）映射列表中的每个文档，在另一个数组中生成一个仅包含电子邮件地址值的新数组。定义转换函数如下

var callback = function(doc) {
    var emailAddresses = [];
    for (var i = 0; i < doc.emails.length; i++) {
        emailAddresses.push(doc.emails[i].address);
    }
    return emailAddresses;
};

var emails = _.map(users, callback);

您还可以使用与 map() 兼容的mongo光标的 Array.map() 方法直接获取数据集：

var emails = Users.find({}).map(callback);

使用 flatten() 展平数组以获取可用数组，然后使用 uniq() 方法返回一堆唯一数组作为如下：

var uniqueEmails = _.uniq(_.flatten(emails));

您的代码现在应该有一系列电子邮件地址，然后您可以发送

Meteor.methods({
    sendNewsletter: function(doc) {
        var users = Users.find({}, { fields: {"emails": true} }).fetch();
        var callback = function(doc) {
            var emailAddresses = [];
            for (var i = 0; i < doc.emails.length; i++) {
                emailAddresses.push(doc.emails[i].address);
            }
            return emailAddresses;
        };

        var emails = _.map(users, callback);
        var to = _.uniq(_.flatten(emails));
        var text = "Title: " + doc.title + "\n\n"
                + "Summary: " + doc.summary + "\n\n\n\n"

        this.unblock();

        // Send the e-mail
        Email.send({
            to: to,
            from: "noreply@domain.com",
            subject: "MyApp - " + doc.title,
            text: text
        });
    }
});

查看下面的演示。

var users = [
	{
		"_id" : "ukn9MLo3hRYEpCCty",    
		"emails" : [ 
			{
				"address" : "a@a.com",
				"verified" : false
			}
		]
	},
	{
		"_id" : "5SXRXraariyhRQACe",    
		"emails" : [ 
			{
				"address" : "b@a.com",
				"verified" : false
			}
		]
	},
	{
		"_id" : "WMHWxeymY4ATWLXjz",    
		"emails" : [ 
			{
				"address" : "c@a.com",
				"verified" : false
			}
		]
	}
];

var callback = function(d) {
	var emailAddresses = [];
	for (var i = 0; i < d.emails.length; i++) {
		emailAddresses.push(d.emails[i].address);
	}
	return emailAddresses;
};
var emails = users.map(callback);
var to = _.uniq(_.flatten(emails));

pre.innerHTML = JSON.stringify(to, null, 4);

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METEOR：无法向多个用户发送电子邮件

1 个答案: