angularjs - ng-repeat a single element over nested objects

Question

Say I have an object with keys corresponding to products and values corresponding to objects which in turn have keys corresponding to price points at which those products have sold, and values corresponding to amount sold.

For example, if I sold 10 widgets at $1 and 5 widgets at $2, I'd have the data structure:

{ 'widget': {'1': 10, '2': 5} }

I'd like to loop over this structure and generate rows in a table such as this one:

thing   price  amount
---------------------
widget  $1     10
widget  $2     5

In Python it's possible to nest list comprehensions to traverse lists data structures like this. Would such a thing be possible using ng-repeat?

Answer 1

How about this?

http://plnkr.co/edit/ZFgu8Q?p=preview

Controller:

$scope.data = {
  'widget1': {
    '1': 10,
    '2': 5
  },
  'widget2': {
    '4': 7,
    '6': 6
  }
};

View:

<div ng-controller="MyCtrl">
    <table>
      <thead>
        <tr>
          <td>thing</td>
          <td>price</td>
          <td>amount</td>
        </tr>
      </thead>
      <tbody ng-repeat="(productName, productData) in data">
        <tr ng-repeat="(price, count) in productData">
            <td>{{productName}}</td>
            <td>{{price|currency}}</td>
            <td>{{count}}</td>
        </tr>
      </tbody>
    </table>
</div>

Output:

thing   price   amount
----------------------
widget1 $1.00   10
widget1 $2.00   5
widget2 $4.00   7
widget2 $6.00   6

This would output a tbody per product (thanks to Sebastien C for the great idea). If needed, you can differentiate between the first, middle and last tbody (using ng-repeat's $first, $middle and $last) and style them with ng-class (or even native CSS selectors such as :last-child -- I would recommend ng-class though)