title: ngFor and ngIf not working
body: <p>can you help here guys please</p>
  
  <p>so i'm trying to display the data i got from the backend but seems like *ngFor not working and want to return only enabled sizes how to do it with ngIf</p>
  
  <p>this is the template</p>
  
  <pre><code>&lt;select name="sizeAndPrice" class="form-control"&gt;
    &lt;option [value]="size.value" *ngFor="let size of item.field_prices.set_details"&gt; 
     &lt;span&gt;{{(item.commerce_price.amount/100) + size.field_product_size[0].options[0].price}} &lt;/span&gt;
     &lt;span&gt;{{(item.commerce_price.amount/100) + sizefield_product_size[0].options[0].price}} EGP&lt;/span&gt;
    &lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>this is the data i get (the part i'm looping on)</p>
  
  <pre><code>commerce_price :                 {amount:12000},
        field_prices : {                
          set_details : {
            field_product_size : [
              {
                enabled :                  0,
                options : [
                  {
                    enabled :              1,
                    price_op :             "plus",
                    price :                0
                  }
                ]
              },
              {
                enabled :                  1,
                options : [
                  {
                    enabled :              1,
                    price_op :             "plus",
                    price :                30
                  }
  
                ]
              }
            ],
  
            field_sizes_discounts : [
              {
                enabled :                  1,
                options : [
                  {
                    enabled :              1,
                    price_op :             "minus",
                    price :                "0"
                  }
                ]
              },
              {
                enabled :                  1,
                options : [
                  {
                    enabled :              1,
                    price_op :             "minus",
                    price :                "15"
                  }
                ]
              }
            ],
          }
        }  
  </code></pre>
  
  <p>so i need to display prices of each size and then subtract the discount and show hide that size if not enabled</p>