class Company(models.Model):
    pass
   
class Appeal(models.Model):
    status = models.CharField(max_length=128)
    company = models.ForeignKey(Company, on_delete=models.SET_NULL)

class AppealType(DjangoObjectType):
    class Meta:
        model = models.Appeal
        fields = "__all__"
        filter_fields = {
            "status ": ["exact", "in"],
        }
        interfaces = (relay.Node,)

class CompanyType(DjangoObjectType):
    class Meta:
        model = models.Company
        fields = "__all__"
        interfaces = (relay.Node,)

class Query(graphene.ObjectType):
    # Relay node
    node = relay.Node.Field()

    appeals = DjangoFilterConnectionField(fields.AppealType)
    companies = DjangoFilterConnectionField(fields.CompanyType)