从刀片中的laravel列表输出值

Question

I have a laravel list defined in my controller as follows:

$industries = Industry::lists('id', 'name');
$salaries = Salary::lists('id', 'range', 'rate');

How do I output or access the columns in blade templating?

I do the following and I get error 'trying to get property of non object':

@foreach ($industries as $industry)
<div class="checkbox margin-top-0  ">
  <label>
    {!! Form::checkbox('industry_list[]', $industry->id) !!}
    {{$industry->name}}
  </label>
</div>
@endforeach

How can I iterate using a for loop as well as I'm trying to determine the first iteration - using the below i get offset error.

@for ($i = 0; $i <= count($salaries); $i++)
<div class="checkbox @if($i == 0) margin-top-0 @endif ">
  <label>
    {!! Form::checkbox('salary_list[]', $salaries->id) !!}
    {{$salaries->name}}
  </label>
</div>
@endfor 

And how do I iterate the $salaries array - do i need to make it a collection since Salary::lists('id', 'range', 'rate'); array only contains two columns and strangely when i do 'dd($salaries);` why is the array defined with the 'range' value as the key and the 'id' as the value despite it being declared with 'id' being the key?

array:33 [
 "10,000 - 15,000" => 24
 "15,000 - 20,000" => 25
] 

Answer 1

I'm afraid you understood lists() a bit wrong. First of all, it builds an array, and arrays have a key and a value. There's no room for a third attribute, and the lists() function therefore only takes two arguments:

public function lists($column, $key = null)

Also, the first argument is the value and the second one is the key. This is due to the fact that you can also build an array with numeric keys only.

So you should do this instead:

$industries = Industry::lists('name', 'id');

And then, in your foreach loop you don't have to treat it like an object, it's just the value:

@foreach ($industries as $id => $industry)
    <div class="checkbox margin-top-0  ">
        <label>
            {!! Form::checkbox('industry_list[]', $id) !!}
            {{$industry}}
        </label>
    </div>
@endforeach

---

However, in your case I don't really see the benefit of using lists(). Just retrieve the full model collection with Industry::all() and you can do things like $industry->id and $industry->name and you will be able to handle more than just two values.