Django管理过滤器（按国外型号）'；由原始sql检索的属性

如何使用属性进行筛选。我知道这是重复的，但我认为有效的现有答案并不适合我

我的

模型有这些
模型。py
：

class Profile(models.Model):
    name = models.CharField(max_length=30, blank=True, null=True)
    country = models.CharField(max_length=30, blank=True, null=True)

class Investment(models.Model):
    ...
    deal_type = models.CharField(max_length=30, choices=deal_type_choices)
    @property
    def investor_country(self):
        with connection.cursor() as cursor:
            # Data retrieval operation - no commit required
            cursor.execute('SELECT crowdfunding_profile.country FROM crowdfunding_profile WHERE crowdfunding_profile.associated_entity_id = %s ORDER BY crowdfunding_profile.associated_entity_id DESC LIMIT 1', (int(self.profile.id),))
            row = cursor.fetchone()
            if not row is None:
                return row[0]
            return self.profile.country

class InvestmentAdmin(ImportExportModelAdmin, admin.ModelAdmin):
    list_display = ('deal_type', 'investor_country')
    list_filter = ('deal_type',)

这是我的
admin.py上的
InvestmentAdmin
：

class Profile(models.Model):
    name = models.CharField(max_length=30, blank=True, null=True)
    country = models.CharField(max_length=30, blank=True, null=True)

class Investment(models.Model):
    ...
    deal_type = models.CharField(max_length=30, choices=deal_type_choices)
    @property
    def investor_country(self):
        with connection.cursor() as cursor:
            # Data retrieval operation - no commit required
            cursor.execute('SELECT crowdfunding_profile.country FROM crowdfunding_profile WHERE crowdfunding_profile.associated_entity_id = %s ORDER BY crowdfunding_profile.associated_entity_id DESC LIMIT 1', (int(self.profile.id),))
            row = cursor.fetchone()
            if not row is None:
                return row[0]
            return self.profile.country

class InvestmentAdmin(ImportExportModelAdmin, admin.ModelAdmin):
    list_display = ('deal_type', 'investor_country')
    list_filter = ('deal_type',)

它工作正常，但我找不到将投资者国家/地区添加到
列表\u过滤器中的方法。大概是这样的：

list_filter = ('deal_type', 'investor_country')

我试着做一些类似或的事情，因为这是我遇到的最相似的问题：

list_filter = ('deal_type', 'profile__investor_country')

但我收到一个错误：

 (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'.