Need to check if an object is empty in laravel

问题

I create a view by doing an eloquent query and then pass it over to Blade.

@if($contacts != null)
//display contacts
@else
You dont have contacts
@endif

However it always assume that $contacts has something even if the query gives me nothing.

I did dd($contacts) and get:

Collection {#247 ▼
  #items: []
}

How do I check if it is empty?

回答1:

If it is a Eloquent Collection as it appears to be from your example you can use the isEmpty collection helper function;

@if(!$contacts->isEmpty())
//display contacts
@else
You dont have contacts
@endif

Collections Documentation

回答2:

There are few ways:

if (!empty($contacts))

if (!contacts->isEmpty())

if (count($contacts) > 0)

if ($contacts->count() > 0)

回答3:

Your Eloquent query returns an array of result, so you can use count.

@if(count($contacts) > 0)
//Display contacts
@else
//No contacts
@endif

回答4:

Your $contacts is empty. Bcoz Your query is unable to get data. Once your query unable to get data it's return an empty arrya. So check it

    @if($contacts->isEmpty())
    {{ 'Empty' }} 
    @else
   {{ 'you have data' }}
    @endif

回答5:

You can use blank($contacts)
Helpers Laravel: blank

回答6:

if it is inside a controller this will help

if(empty($query) {
     //do something
}else{
//do some stuff
}

回答7:

if(count($profiles) > 0){
            return redirect()->action('NameController@name');
        }else{
            return view('user');
        }

this also works fine in a controller

来源：https://stackoverflow.com/questions/41269198/need-to-check-if-an-object-is-empty-in-laravel