[Bug] "Using $this when not in object context" when i use related model

[pana1990]

I get the following error "Using $this when not in object context" when i use related model.

Example code :

$file = \Yii::createObject([
                'class' => ExcelFile::class,
                'sheets' => [
                    'MoneyMovements' => [
                        'class' => ActiveExcelSheet::class,
                        'query' => User::find(),
                        'attributes' => [
                            'id',
                            'address.street', // related model
                        ],
                    ],
                ],
            ]);

[pana1990]

@mikehaertl check my pr please #22

[mikehaertl]

@pana1990 Just released 2.7.1 containing this fix. Thanks for finding this bug.