filters.py

import 

class PacientFilter(filters.FilterSet):
    name = filters.CharFilter(lookup_expr='icontains')
    document_id = filters.CharFilter(lookup_expr='icontains')
        
    class Meta:
        model = model.Pacient
        fields = ['name', 'document_id']
        

class PacientFilterAlternative(filters.FilterSet):
    class Meta:
        model = model.Pacient
        fields = ['name', 'document_id']
        filter_overrides = {
             models.CharField: {
                'filter_class': filters.CharFilter,
                'extra': lambda f: {
                    'lookup_expr': 'icontains',
                }
            }
        }