$dataProvider,
               //'filterModel' => $searchModel,
                'columns' => [
                    ['class' => 'yii\grid\SerialColumn'],
                    [
                        'attribute'=>'level',
                        'value'=>function ($model) {
                            return \yii\log\Logger::getLevelName($model->level);
                        },
                        'filter'=>[
                            \yii\log\Logger::LEVEL_ERROR => 'error',
                            \yii\log\Logger::LEVEL_WARNING => 'warning',
                            \yii\log\Logger::LEVEL_INFO => 'info',
                            \yii\log\Logger::LEVEL_TRACE => 'trace',
                            \yii\log\Logger::LEVEL_PROFILE_BEGIN => 'profile begin',
                            \yii\log\Logger::LEVEL_PROFILE_END => 'profile end'
                        ]
                    ],
                    'category',
                    'prefix',
                    [
                        'attribute' => 'log_time',
                        'format' => 'datetime',
                        'value' => function ($model) {
                            return (int) $model->log_time;
                        }
                    ],
                    [
                        'class' => 'common\helpers\DiyActionColumn',
                        'template'=>'{view} {delete}'
                    ]
                ]
            ]); ?>