Getting "Undefined variable: categories" error in laravel

Question

I'm learning laravel and writing a simple project while learning it, but there is a problem that I couldn't solve. I have a form which is for creating an article like this :

<form action="{{route('admin.article.store')}}" method="POST">
@csrf
        
        //some divs

        <div class="form-group">
        <label for="title">Category</label>
        <div id="output"></div>
        <select class="chosen-select" name="categories[]" multiple style="width:400px">
          @foreach ($categories as $cat_name => $cat_id)
          <option value="{{$cat_id}}">{{$cat_name}}</option>
          @endforeach
        </select>
        </div>

        <div class="form-group">
            <label for="title"></label>
            <button type="submit" class="btn btn-inverse-success btn-fw">Create</button>
            <a href="{{route('admin.article.index')}}" class="btn btn-inverse-warning btn-fw">back</a>
        </div>

</form>

And in my controller, I'm storing this requests like this :

$article = $article->create($request->all());
$article->categories()->attach($request->$categories);

but after testing, it says:

ErrorException

Undefined variable: categories

what can I do?

You have not defined $categories, you are using on your foreach loop. Post your controller code, and probably index function. — STA
– STA, Commented Jun 21, 2020 at 11:13
no, the view is ok, the foreach loops correctly and displays the categories, but the problem is when I try to save (store) the form — III_phr
– III_phr, Commented Jun 21, 2020 at 11:17

STA · Accepted Answer · 2020-06-21 11:27:15Z

2

It's a typo mistake. You are using $request->$categories, should be $request->categories. Remove the extra dollar ($) sign.

$article->categories()->attach($request->categories);

answered Jun 21, 2020 at 11:27

STA

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1 Comment

III_phr Over a year ago

Oh thank you, I've been searching for typo but not this type, sorry

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