Question

我已使用群组汇总创建了计数数据收集的代码，但现在我遇到了进程计数组无法提供正确结果的问题。我不知道问题出在哪里。

此代码的结果与此Result类似。有我的代码：

//js

Template.laporankategori.helpers({
  profilcount: function() {
    var subs = {};
    Profil.find().forEach(function(e) {
      if (subs[e.kategori] == null)
        subs[e.kategori] = 0;
      subs[e.kategori] += e.amount;
    });

    var result = [];
    _.each(subs, function(value, key) {
      result.push({kategori: key, amount: value});
    });

    return result;
  }
});



//publish
Meteor.publish("profilcount",function(args) {
    var sub = this;

    var db = MongoInternals.defaultRemoteCollectionDriver().mongo.db;

    var pipeline = [
      { "$group": {
        "_id": "$kategori",
        count:{$sum:amount}
      }}
        ];

   db.collection("profil").aggregate(        
        pipeline,

        Meteor.bindEnvironment(
            function(err, result) {
                _.each(result, function(e) {
                  sub.added("profil", Random.id(), {
                    kategori: kategori._id,
                    amount: kategori.count
                  });
                });
                sub.ready();
            },
            function(error) {
                Meteor._debug( "Error doing aggregation: " + error);
            }
        )
    );
});

// HTML {{#each profilcount}} <tr> <td>{{kategori}}</td> <td>{{ amount}}</td> </tr> {{/each}}

我想要这样的结果。 Result

Answer 1

我有其他解决方案，不使用聚合。以防万一它可以帮助你。

// JS

Template.laporankategori.helpers({
 profilcount () {
  var result = [];
  var categs = [];
  profil.find().forEach(function(profil) {
   if(categs.indexOf(profil.kategori) > -1) {
    for (var i = 0; i < result.length; i++) {
      var res = result[i];
      var count = res.count + 1;
      var amount = res.amount + profil.amount;
      result[i].count = count;
      result[i].amount = amount;
      break;
    }
   } else {
   result.push({
      name: profil.kategori,
      amount : profil.amount,
      count : 1
    });
    categs.push(profil.kategori);
   }
  });
  return result;
 }
});

Meteor.publish("profil",function(args) {
  return profil.find({},{fields: {amount: 1, kategori:1}});
});

// HTML

<table>
   <thead>
      <tr>
          <td> Kategori </td>
          <td> Total Amount</td>
          <td> Count </td>
       </tr>
   </thead>
   <tbody>
     {{#each profilcount}}
         <tr>
              <td>{{ name }}</td>
              <td>{{ amount }}</td>
              <td>{{ count }}</td>
          </tr>
    {{/each}}
   </tbody>
</table>

流星：按群组计算

1 个答案: