Struggling with handling null values while looping through a JSON object using AngularJS.
I am still learning the ropes of Angular.
<a href="#" data-mycustom="{{product.related}}">...</a>
If the 'related' property is null:
{
"related":null
}
I aim to substitute it with "-1":
<a href="#" data-mycustom="-1">...</a>
Attempted using a ternary operator but it fails to evaluate correctly and just displays as plain text.
To add a custom attribute after evaluating an interpolation directive, you can simply use ng-attr.
Example:
<img src="#" ng-attr-data-custom="{{user.profile || 'default' }}">...</img>
To provide a comprehensive answer, here is the solution to the original poster's query about using a ternary operator in a directive:
Make sure to enclose the entire ternary statement within {{}}, not just the variable. For instance, instead of this
<a href="#" data-mycustom="{{product.related}} ? product.related : '-1'">...</a>
it should be written as
<a href="#" data-mycustom="{{product.related ? product.related : '-1'}}">...</a>
Otherwise, Angular will not interpret it correctly -- you will end up with the value of product.related followed by the literal string ? product.related : '-1'.
Utilize the or operator in your code using the provided example:
<a href="#" data-mycustom="{{product.related || -1}}">...</a>
Simply utilize this
<a href="#" ng-attr-data-custom="{{product.related || '-1' }}">...</a>
This is akin to saying "attempt to utilize product.related if it's available. If not, use -1 instead"
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