在插入 Meteor.method 调用后检索 _id [英] Retrieve _id after insert in a Meteor.method call

问题描述

我需要在插入文档后检索 _id.

I need to retrieve the _id after insert a document.

在客户端:

Meteor.call('saveDocument', value1, value2);

在服务器中

saveDocument: function (value1, value2) {
    MyCollection.insert({ 'value1': value1, 'value2': value2});
}

我已经尝试过在服务器端插入的回调函数.这样我就可以得到文档的_id，但是在回调函数里面，这不能返回给客户端调用:

I have tried with the callback function of the insert in the server side. This way I can get the document's _id, but inside the callback function and this can't return to the client call:

saveDocument: function (value1, value2) {
    MyCollection.insert({ 'value1': value1, 'valu2': value2}, 
        function(err, docsInserted){ console.log(docsInserted) }); 
        //Works, but docsInserted can't return to the client.
}

推荐答案

您的客户端调用应使用异步样式 - 来自文档

your client call should use the async style - from the docs

在客户端，如果不传递回调并且不在存根内部，则调用将返回 undefined，并且您将无法获取该方法的返回值.

On the client, if you do not pass a callback and you are not inside a stub, call will return undefined, and you will have no way to get the return value of the method.

Meteor.call('saveDocument', value1, value2, function(error, result){
  var theIdYouWant = result;
});

然后你只需从方法中返回 id

then you just return the id from the method

saveDocument: function (value1, value2) {
  return MyCollection.insert({ 'value1': value1, 'valu2': value2}); 
}

为了更好地衡量这两个部分的文档

for good measure give a once over to these 2 sections of the docs

http://docs.meteor.com/#meteor_call

http://docs.meteor.com/#insert

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