在尝试了其他线程的所有现有解决方案后，我遇到了这个问题，没有一个有效的解决方案，例如：mysql错误：1364字段“display\u name”没有默认值，如果我这样做的话 ->nullable() 我所有的插页都是空的。这就是我的代码：
控制器：

<?php

namespace App\Http\Controllers;
use App\Utilisateur;

use Illuminate\Http\Request;

class UtilisateursController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        //
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {
        return view('login.create');
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
        $this->validate($request, [
            'username' => 'required',
            //'email' => 'required',
            'password' => 'required',
            //'password_confirmation' => 'required',
            //'telephone' => 'required'
          ]);
          $inscription = new Utilisateur([
            'Login' => $request->get('username'),
            'E-mail' => 'email',
            'Password' => $request->get('password'),
            'Telephone' => 'telephone',
            'created_at' => $request->get(date("Y-m-d H:i:s")),
            'updated_at' => $request->get(date("Y-m-d H:i:s"))
          ]);
          $inscription->save();
          return redirect()->route('login.create')->with('success', 'inscription réussite');
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit($id)
    {
        //
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, $id)
    {
        //
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function destroy($id)
    {
        //
    }
}

模型：

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Utilisateur extends Model
{
    protected $fillable = ['username', 'email', 'password', 'telephone'];
}

数据库：

<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateUtilisateursTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('utilisateurs', function (Blueprint $table) {
            $table->increments('ID-User');
            $table->string('Login', 250);
            $table->string('Password', 250);
            $table->string('Telephone', 250);
            $table->string('E-mail', 250)->unique();
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('utilisateurs');
    }
}