text: import django_filters
  
  from .models import ProjectModel
  
  
  class ProjectModelFilter(django_filters.rest_framework.FilterSet):
      product_id = django_filters.NumberFilter(method='search_product')
  
      def search_product(self, queryset, name, value):
          return queryset.filter(belong_product_id_exact=value)
  
      class Meta:
          model = ProjectModel
          fields = ['belong_product']
  