流星：在模板中显示数据时出错

Question

我是 Meteor 的新手，当我尝试显示 mongodb 集合中的项目列表时出现此错误。

这些是我试图从我的 rewards 集合中检索的数据

这是我的代码：

server/publications.js

Rewards = new Mongo.Collection('rewards');

Meteor.publish('allRewards', function () {
    if (this.userId) {
        return Rewards.find({}, {
            fields: {
                'title': 1,
                'headline': 1,
                'summary': 1,
                'description': 1,
                'requirements': 1
            }
        })
    } else {
        this.ready()
    }
});

lib/router.js

Router.route('/rewards', function () {

    var selfRoute = this;

    var rew = RewardsSubs.subscribe("allRewards");
    document.title = "Rewards"

    Tracker.autorun(function (computation) {
        if (RewardsSubs.ready()) {
            selfRoute.render('rewards', {
                data: function () {
                    return {
                        rewards: rew
                    };
                }
            });
            computation.stop()
        } else {
            selfRoute.render('loading');
        }
    });
});

client/startup/default.js

RewardsSubs = new SubsManager({
    // maximum number of cache subscriptions
    cacheLimit: 10,
    // any subscription will be expire after 5 minute, if it's not subscribed again
    expireIn: 10
});

client/templates/rewards/rewards.html

<template name="rewards">
    <div class="ui container">
        <table class="ui very basic table">
            <tbody>
                {{#each rewards}}
                <tr>
                    <td>
                        <span>{{title}}</span>
                    </td>


                    <td>
                        <h4 class="ui image header">
                            <div class="content">
                                <div class="header">
                                    . <span>{{headline}}</span>
                                    . <span>{{summary}}</span>
                                </div>
                            </div>
                        </h4>
                    </td>

                </tr>
                {{/each}}
            </tbody>
        </table>
    </div>
</template>

我不知道为什么我有这个“{{#each}} 目前只接受数组、游标或错误值。”...我很感激任何解决这个问题的帮助。

Answer 1

SOLUTION: 我终于找到错误了。问题是我在加载 server/publications.js 之前引用了奖励 collection，因此尚未创建奖励 collection。

首先，我按照 @iiro 在评论中的建议更改了 router.js。

lib/router.js

Router.route('/rewards', function () {

    var selfRoute = this;

    RewardsSubs.subscribe("allRewards");
    document.title = "Rewards"

    Tracker.autorun(function (computation) {
        if (RewardsSubs.ready()) {
            selfRoute.render('rewards', {
                data: function () {
                    return {
                        rewards: Rewards.find()
                    };
                }
            });
            computation.stop()
        } else {
            selfRoute.render('loading');
        }
    });
});

然后我将奖励 collection 从 server/publications.js 更改为 lib 文件夹

lib/collections/rewards.js

Rewards = new Mongo.Collection('rewards');

此问题与 Default file load order in Meteor

流星：在模板中显示数据时出错

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