Laravel CRUD删除功能错误

Question

Here,what i want is when i press delete button necessary raw need to be deleted.that means relevant trainee_id and its details need to be deleted.

Here is the controller i`m using for that.

public function admin_destroy($trainee_id)
{
    registerdetails::where('trainee_id','=',$trainee_id)->first()->destroy(); 
}

Here is the route.

Route::get('Delete/{trainee_id?}', 'UserRegisterController@admin_destroy')
       ->where('trainee_id', '(.*)');;`

Here is the view button for delete.

<td>
    <a class="btn btn-danger" href="Delete/{{ $item->trainee_id }}">Delete</a>
</td>

Here is the URL um getting when i press the delete button.

http://127.0.0.1:8000/Delete/MOB/TR/1739

Finally this the error i`m getting.

Can anyone suggest me to fix this error.

Answer 1

public function admin_destroy($trainee_id)
    {
        registerdetails::destroy($trainee_id)->first(); 
    }

use this

Answer 2

destroy method expects a key, or array of keys. Like so:

registerdetails::destroy($trainee_id);

You can also do:

registerdetails::where('trainee_id','=',$trainee_id)->delete();

Check the docs: https://laravel.com/docs/5.4/eloquent#deleting-models

Answer 3

the destroy() function needs a parameter (either a single id or array of ids or ids seprated by comma) to be passed as

App\registerdetails::destroy(1);

App\registerdetails::destroy([1, 2, 3]);

App\registerdetails::destroy(1, 2, 3);

either pass the id to the destroy like this

registerdetails::destroy($trainee_id); 

or use delete() method to delete as

registerdetails::where('trainee_id','=',$trainee_id)->delete();