laravel 5.4表格下拉数据库

Question

I want to fetch drop down option value & name from database, to do that my controller code is

 $roles = Role::pluck('role','user_id');
 return view('users.add_role',compact('roles'));

to fetch this data from drop down list my view file code is

<select name="role" class="form-control" >
          @foreach($roles as $role)
            <option value="{{ $role->user_id }} "> {{ $role->role }} </option>
          @endforeach
</select>

but it says error

Trying to get property of non-object (View: C:\xampp\htdocs\auth2\resources\views\users\add_role.blade.php)

if i just only use

<select name="role" class="form-control" >
      @foreach($roles as $role)
        <option value="{{ $role }} "> {{ $role }} </option>
      @endforeach
</select>

then it shows role column of the table, but it not pass option value to database. so what is the correct way to generate option value & name from database?

Answer 1

Your $roles variable containt an array which is looks like

[0] => 'your_role'
[1] => 'your_role'

Where is 0 and 1 index is user_id. So your user_id is set as an index of your $roles array. Simply do it dd($roles) and check the output. $key as $role will work. Where $key will containt the user_id .

 @foreach($roles as $key => $role)
      <option value="{{ $key }} "> {{ $role }} </option>
    @endforeach

Answer 2

I use laravel collective package to generate dropdown list much more easier, you can do things like, on your blade template and it will render the list for you

{{ Form::select('role', $role )) }}