如何在laravel中检查模型的对象是否为空？

Question

I am accessing my database using model by using following code.

$persons = WysPerson::where('family_id', $id)->get();

I checked $persons is empty or not by using following code.

if($persons){
        var_dump($persons);
    }

Actually $persons is empty. But I am getting result for var_dump as

object(Illuminate\\Database\\Eloquent\\Collection)#417 (1) { ["items":protected]=> array(0) { } }

How will I check $persons is empty? Can anyone help?

Answer 1

You can use the isEmpty method:

http://laravel.com/api/5.0/Illuminate/Support/Collection.html#method_isEmpty

Answer 2

Use the count function

@if (count($persons))

Answer 3

If you have eloquent collection, call the function isEmpty() like this:

$persons->isEmpty();

This return true or false. Hope this helps.

Answer 4

尝试这个。

is_null($var)?abort('empty'):abort('filled') 

Answer 5

You can use isEmpty() method.

At the same time you can check it by simply with count() method before once you fetch the data.

    $count = WysPerson::where('family_id', $id)->count();
    if($count==0){
       return redirect()->back()->withErrors('Empty Data');
     }
    $persons = WysPerson::where('family_id', $id)->get();