javascript - 从服务器上的 Meteor 集合中获取项目会抛出 "Can' t wait without Fiber”

Question

我第一次制作一个相当简单的 meteor 应用程序，它应该查询某个 repo 中的所有 git 问题。从 github api 获取问题列表后，我们的想法是根据这些问题创建任务集合。但是，每当我尝试查询当前任务列表时，我都会得到:

.../.meteor/tools/c2a0453c51/lib/node_modules/fibers/future.js:83
W20140418-17:00:43.872(-7)? (STDERR)        throw new Error('Can\'t wait without a fiber');
W20140418-17:00:43.872(-7)? (STDERR)              ^
W20140418-17:00:43.889(-7)? (STDERR) Error: Can't wait without a fiber
W20140418-17:00:43.889(-7)? (STDERR)     at Function.wait    
(.../.meteor/tools/c2a0453c51/lib/node_modules/fibers/future.js:83:9)
W20140418-17:00:43.890(-7)? (STDERR)     at Object.Future.wait    
(.../.meteor/tools/c2a0453c51/lib/node_modules/fibers/future.js:325:10)
W20140418-17:00:43.890(-7)? (STDERR)     at _.extend._nextObject (packages/mongo-    
livedata/mongo_driver.js:805)
W20140418-17:00:43.890(-7)? (STDERR)     at _.extend.forEach (packages/mongo-livedata/mongo_driver.js:836)
W20140418-17:00:43.890(-7)? (STDERR)     at Cursor.(anonymous function) [as forEach] (packages/mongo-  
livedata/mongo_driver.js:695)
W20140418-17:00:43.890(-7)? (STDERR)     at app/server/publish.js:51:33
W20140418-17:00:43.890(-7)? (STDERR)     at Array.forEach (native)
W20140418-17:00:43.891(-7)? (STDERR)     at app/server/publish.js:49:19
W20140418-17:00:43.891(-7)? (STDERR)     at   
...packages/npm/.build/npm/node_modules/github/api/v3.0.0/issues.js:116:17
W20140418-17:00:43.891(-7)? (STDERR)     at IncomingMessage.<anonymous>   
(...packages/npm/.build/npm/node_modules/github/index.js:756:21)

我的第一个想法是，当我应该使用 node-fiber 时，我在某处使用了回调，但代码看起来相对简单:

var repos = ['my-repo', 'my-repo-1',];
var pollGit = function() {

repos.forEach(function(repo) {
    github.issues.repoIssues({
        user: 'user',
        repo: repo
    }, function(err, stuff) {
        if (err) {
            throw err;
        }
        stuff.forEach(function (issue) {
            var sel = {git_id: issue.id};
            Tasks.find(sel).forEach(function (item) { //ERROR THROWN HERE
                console.log('got', item);
            });
        });
    });
 });
};

Meteor.startup(function() {
    pollGit();
});

每当我在调用 find 后尝试获取实际对象时，都会发生此错误。只需调用 find() 就可以正常工作。到底是什么导致了错误？

Answer 1

回答我自己的问题，以防有人需要答案:

让它与 How to insert in Collection within a Fiber? 一起工作

代码如下:

Fiber = Npm.require('fibers');
var repos = ['my-repo', 'my-repo-1',];
var pollGit = function() {
repos.forEach(function(repo) {
    github.issues.repoIssues({
        user: 'user',
        repo: repo
    }, function(err, stuff) {
        if (err) {
            throw err;
        }
        stuff.forEach(function (issue) {
            var sel = {git_id: issue.id};
            Fiber(function() {
                Tasks.find(sel).forEach(function (item) { //ERROR THROWN HERE
                    console.log('got', item);
                });
            }).run();

        });
    });
 });
};

Meteor.startup(function() {
    pollGit();
});