解决Laravel 使用insert插入数据，字段created_at为0000的问题

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Notice extends Model
{
  protected $guarded = [];

  //获取部门名称
  public function fromDep(){
    return $this->belongsTo('App\Models\Department','from','id');
  }

  public function toDep(){
    return $this->belongsTo('App\Models\Department','to','id');
  }

  public function toUser(){
    return $this->belongsTo('App\User','create_user','id');
  }
}

public function store(Request $request)
  {
    $data = $request->only(['title','sort','level','from','content','document']);
    $data['creater'] = Auth::user()->id;
    if(Notice::insert($data)){
      return ResponseLayout::apply(true);
    }else{
      return ResponseLayout::apply(false);
    }
  }

public function store(Request $request)
  {
    $data = $request->only(['title','sort','level','from','content','document']);
    $data['creater'] = Auth::user()->id;
    if(Notice::create($data)){
      return ResponseLayout::apply(true);
    }else{
      return ResponseLayout::apply(false);
    }
  }

public function store(Request $request)
  {
    $data = $request->only(['title','sort','level','from','content','document']);
    $data['creater'] = Auth::user()->id;
    $notice = new Notice($data);
    if($notice->save()){
      return ResponseLayout::apply(true);
    }else{
      return ResponseLayout::apply(false);
    }
  }