Question 40900 in PHP Question posted in
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how to check is there a value in the other column of table? – PHP

In a laravel blade in third line of this code I want to check if parent_id exists in id column or not
please help me!
I’m using laravel 9

@if ($category->parent_id == 0)
no parent
@if ($category->parent_id)
no parent
@else
{{ $category->parent->name }}
@endif

I corrected it this way:

  @elseif (empty($category->parent))
Tags:

3

Answers


  1. 0

    Balde:

    you can use the empty() to check if empty.

    @if ($category->parent == 0)
no parent
@elseif (empty($category->parent))
<p>no parent</p>
@else
{{ $category->parent->name }}
@endif

    or ?? operator

    {{ $category->parent_id ?? 'no parent' }}

    You can use the is empty in twig as below:

    {% if category is empty %}
  <p> No parent </p>
{% endif %}
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  2. 0

    You can try by using isset() function

    @if ($category->parent_id == 0)
no parent
@if (!isset($category->parent_id))
no parent
@else
{{ $category->parent->name }}
@endif
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  3. 0

    Using exists() function for parent()

    Not that exists function works just with single relations (belongsTo, hasOne)

    // This will run SQL query // returns boolean 
$category->parent()->exists(); // Don't forget parentheses for parent()

    If you want to save performance and not calling sql query

    count($category->parent); // returns 0 if not exist
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