将数据上传到Meteor / Mongo DB

问题描述

我有一个Meteor应用程式，想要将资料（来自csv）上传到一个流星集合。

I have a Meteor app and would like to upload data (from csv) to a meteor collection.

我找到了：

• 处理文件上传的解决方案（例如） li>
  
• 的方法mongo db from the shell


• 引用流星路由器 - 但我使用了优秀的，这似乎不提供此功能。

• solutions (e.g. Collectionfs) which deal with file uploads
• methods for uploading directly to the underlying mongo db from the shell
• references to meteor router - but I am using the excellent iron-router, which does not appear to provide this functionality

我的要求是应用程序用户能够将csv数据上传应用程序内的应用程序。我不需要将csv文件存储在应用程序文件结构中的任何位置，我只需要将csv数据读入集合即可。

My requirement is that the app user be able to upload csv data to the app from within the app. I do not need to store the csv file anywhere within the app file structure, I just need to read the csv data to the collection.

这是可能的，我不能弄清楚如何做到这一点，因为我的职权范围（'上传数据到流星'）是不明确或不正确的。

It is possible that I cannot figure out how to do this because my terms of reference ('upload data to meteor') are ambiguous or incorrect. Or that I am an idiot.

推荐答案

我已经使用，以及此代码（使用插件来解析csv数据）。这是在客户端完成的，并且独立于使用铁路由器或不是。将插入代码移动到Meteor方法，首先上传csv文件，然后解析并将数据插入服务器是相当简单的。我也尝试过，但没有看到任何性能改进。

I've solved this problem in the past using this gist of mine, together with this code (using the jquery-csv plugin to parse the csv data). This is done on the client side and is independent of using iron-router or not. It would be fairly straightforward to move the insertion code into a Meteor method, uploading the csv file first and then parsing and inserting the data on the server. I've tried that, too, but didn't see any performance improvement.

$(document).ready(function() {
    var dd = new dragAndDrop({
        onComplete: function(files) {
            for (var i = 0; i < files.length; i++) {
                // Only process csv files.
                if (!f.type.match('text/csv')) {
                    continue;
                }
                var reader = new FileReader();
                reader.onloadend = function(event) {
                    var all = $.csv.toObjects(event.target.result);
                    // do something with file content
                    _.each(all, function(entry) {
                         Items.insert(entry);
                    });
                }
             }
        }
     });

     dd.add('upload-div'); // add to an existing div, turning it into a drop container
});

请注意，如果你插入了很多条目，关闭一段时间，直到所有的插入。否则，服务器和浏览器选项卡上的节点将变得非常慢。请参阅我的建议解决方案：

Beware though that if you are inserting a lot of entries, then you are better off turning all reactive rerendering off for a while, until all of them are inserted. Otherwise, both node on the server and the browser tab will get really slow. See my suggested solution here: Meteor's subscription and sync are slow

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