Unexpected behavior: Angular ng-init does not trigger upon modification of scope variable

One of my variables, $scope.code.N3, is populated by an asynchronous ajax call.

Another variable, $scope.data.selectedIRI, holds the value of an option selected in an html combobox.

I have a snippet of html code within a table that needs to be refreshed when the variable changes:

This code works fine and updates correctly:

<tbody>
    <tr ng-repeat="t in code.N3" ng-if="t.subject==data.selectedIRI" ng-include="'displayPredicateObject'">
        <!-- Rendered by template -->
    </tr>
</tbody>

However, this section does not update as expected (even though it works elsewhere in my code where similar snippets are used within angular-refreshed tags):

<tbody ng-init="allTriples = code.N3">
    <tr ng-repeat="t in allTriples" ng-if="t.subject==data.selectedIRI" ng-include="'displayPredicateObject'">
        <!-- Rendered by template -->
    </tr>
</tbody>

Additionally, this section also fails to update:

<table ng-init="s = data.selectedIRI">
    <tbody ng-init="triples = getTriples(null, null, s)">
        <tr><td>[[triples]]</td></tr>
    </tbody>
</table>

In this case, the function getTriples(...,...,data.selectedIRI) is never triggered even though $scope.data.selectedIRI has been updated. Any ideas why?

Answer №1

When initializing the value using ng-init, $scope.code.N3 was found to be undefined due to its dependency on an asynchronous call that had not yet been completed, leading to a failure in ng-repeat without any error messages.

<tbody ng-init="allValues = code.N3">
    <tr ng-repeat="v in allValues" ng-if="v.subject==data.selectedIRI" ng-include="'displayPredicateObject'">
        <!-- Template rendering happens here -->
    </tr>
</tbody>

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