class EYBSalaryFilter(django_filters.rest_framework.FilterSet):
    geo_description = django_filters.CharFilter(field_name='geo_description', lookup_expr='iexact', required=True)
    vertical = django_filters.CharFilter(field_name='vertical', lookup_expr='iexact')
    professional_level = django_filters.CharFilter(field_name='professional_level', lookup_expr='iexact')