How to avoid checking every time, if variable is set in blade template? Laravel 8 - laravel

Question

I know about something like this:
{{ old('contents', $page->contents ?? null) }}
But what about more complicated cases, like checkboxes and selects?
<select id="custom_template" name="custom_template">
{{--default empty option, if nothing is selected yet--}}
<option label=" " {{ ($page->custom_template == null)? "selected" : "" }}></option>
#foreach($templates as $template)
<option value="{{ $template->id }}" {{ ($page->custom_template == $template->id)? "selected" : "" }}>{{ $template->name }}</option>
#endforeach
</select>
I need to avoid checking #isset($page) and also check old input. How can I do it in that select input?

Answer 1

You can use Type hinting to avoid the 'isset'.
Your controller
/**
* Show the form for creating a new resource.
*
* #param \App\Entities\Page $page
*
* #return \Illuminate\View\View
*/
public function create(\App\Entities\Page $page)
{
return view('page', compact('page'));
}
With using 'Type hinting' in create function will create empty collection of Page Entities. No need to check isset condition in view, $page->custom_template will give you null now, instead of error.
And your view, to check the old input.
<select id="custom_template" name="custom_template">
<option value="">Select Option</option>
#foreach($templates as $template)
<option value="{{ $template->id }}" {{ (old('custom_template', $page->custom_template) == $template->id) ? 'selected' : '' }}>{{ $template->name }}</option>
#endforeach
</select>
By using the above condition you can use same view for create and edit function.
Hope, this will solve your problem.

Answer 2

I'm not sure I quite understand what you're trying to do but this approach may help; provided you're using JQuery:
<script>
$(document).ready(function() {
#if($page->custom_template)
$('option[value="{{ $page->custom_template}}"]').prop("selected", true);
#endif
});
</script>