Catch undefined index from MongoDB document Laravel

Question

Hi everyone! The documents within my MongoDB collection can differ. Some have an extra embedded document called Additional_Information. I would like the web browser to display a table of the information within the Additional_Information when this is available, and to ignore it when it's not found! This should be the easiest if-statement, but I can't get it to work. I have tried this code:

@if (is_array($document['Additional_Information']))
      <li><a data-toggle="tab" href="#busco">Additional Information</a></li>
@endif

It does display the Additional Information tab when it is available. But when it is not, an Undefined index: Additional_Information it thrown! Does someone know how I can make this distinction between documents and catch when it's not there?

Is that code supposed to be PHP? Or does Mongo have it's own thing here? — Machavity
– Machavity ♦, Commented Dec 1, 2016 at 13:13
@Machavity I think @if and @endif is Blade syntax (Laravel's template engine) — simon
– simon, Commented Dec 1, 2016 at 13:24

simon · Accepted Answer · 2016-12-01 13:14:00Z

2

Use empty() instead:

@if (!empty($document['Additional_Information']))
      <li><a data-toggle="tab" href="#busco">Additional Information</a></li>
@endif

According to the documentation:

No warning is generated if the variable does not exist. That means empty() is essentially the concise equivalent to !isset($var) || $var == false.

edited Dec 1, 2016 at 13:14

answered Dec 1, 2016 at 13:13

simon

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1 Comment

Anna Jeanine Over a year ago

I knew it has to be something simple! Thank you!

Satya · Accepted Answer · 2016-12-01 13:13:22Z

0

you need to use array_key_exists as well in order to check if key Additional_Information exists or not in the array $document

answered Dec 1, 2016 at 13:13

Satya

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