fix: fixed get_attribute checks isset instead of returning value

assigned to @dyszczo

By Bartek Jaskulski on 2021-08-23T08:34:07 (imported from GitLab)

approved this merge request

By Dyszczo on 2021-08-23T08:51:19 (imported from GitLab)

assigned to @bartjaskulski and unassigned @dyszczo

By Dyszczo on 2021-08-23T08:51:22 (imported from GitLab)

mentioned in commit cd630065

By Bartek Jaskulski on 2021-08-23T10:18:34 (imported from GitLab)

merged