The incorrect ordering of my array within a nested ng-repeat in AngularJS

I have extracted Json data from a mongodb database collection.

Successfully displayed the keys of this json.

Currently attempting to present an array in a table using a double ng-repeat in my view.

Although I am close to achieving my desired outcome, the order of values is incorrect.

Using the attribute names of my items yields the correct result, but that is not the preferred solution for me.

Here is the code snippet used in my view:

<table class="table table-striped">
<caption>Content</caption>

<thead>
    <tr>
    <th ng-repeat="caption in captions">
    {{caption}}
    </th>
    </tr>
</thead>

<tbody>
<tr ng-repeat="content in contentCollection">
<td ng-repeat="item in content">
{{item}}
</td>
</tr>
</tbody>
</table> 

This currently displays:

_id     session     expires

id1         expires1        session1

However, it should show as:

_id     session     expires

id1     session1    expires1

The controller sends an array with the correct value order (id1, session1, expires1), which I can confirm in the Chrome console using console.log().

I believe creating a directive might provide a workaround, unless I overlooked something.

Any insights on what could be causing this issue?

Thank you,

Rom

Answer №1

If you want to maintain a specific order in an ng-repeat loop, the best approach is to utilize the orderby filter. You may not necessarily require a directive, but for more complex sorting requirements, consider using a custom comparator function.

For arrays consisting of strings, a custom filter like the following can be useful:

angular.module('myApp',[])
    .filter('mySort', function() {
        return function(list) {
            return list.sort();
        }
    });

Assuming your data is structured as objects and requires preprocessing before displaying in the repeat set, consider implementing a solution similar to the one demonstrated at http://plnkr.co/edit/ART87TjilotbnsuD02y1?p=preview.

It is advisable to move the array manipulation logic into a service, including returning the keys from the service.

Furthermore, if the repeating process is frequent, moving the entire table into a directive can enhance code readability and maintenance.

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