我得到的錯誤是“Illuminate\Database\QueryException：SQLSTATE[42S22]：未找到列：1054 ‘where 子句’中的未知列‘key’（SQL：從其中選擇 *！=admin_settings空key限制 1）”因為函數在app/Providers/AppServiceProvider.php public function boot()    {        if (Schema::hasTable('admin_settings')) {            $google_analytics_details = AdminSetting::where('key','!=','null')->first();        }else {            $google_analytics_details = '';        }                View::share('google_analytics_details', $google_analytics_details);    }當我評論引導功能的代碼時，它就成功遷移了。我正在尋找此視圖共享的替代方案。誰能幫我？？我的遷移文件內容：<?phpuse Illuminate\Database\Migrations\Migration;use Illuminate\Database\Schema\Blueprint;use Illuminate\Support\Facades\Schema;class UpdateAdminSettingsTable extends Migration{    /**     * Run the migrations.     *     * @return void     */    public function up()    {        //         Schema::table('admin_settings', function (Blueprint $table) {            $table->dropColumn('google_analytics_code');        });        Schema::table('admin_settings', function (Blueprint $table) {            $table->longText('key')->nullable()->after('id');            $table->longText('value')->nullable()->after('key');        });    }    /**     * Reverse the migrations.     *     * @return void     */    public function down()    {        //         Schema::table('admin_settings', function (Blueprint $table) {        });    }}