title: Object access via Angular
body: <p>I want to acccess the fields category and specCategory. I applied <code>*ngFor="let x of data" {{x._id.category}}</code> but it is not working. Whats wrong with it?</p>
  
  <p>I am using aggregate functionality to group the categories.</p>
  
  <pre><code>  $group: {
                _id: {
          category: "$category",
          specCategory: "$specCategory"
      },
  
  
                  min: {$min: '$price'},
                  max: {$max: 500},
                 total:{$sum:1}
              }
  </code></pre>
  
  <p><strong>Result:</strong></p>
  
  <pre><code>[ { _id: { category: 'Wasser &amp; Wind', specCategory: 'Surfen' }, min: 49, max: 500, total: 1 }, { _id: { category: 'Reisen', specCategory: 'Hotel' }, min: 49, max: 500, total: 1 } ]
  </code></pre>
  
  <p>I will need to access the category, specCategory and total value </p>