When a QuerySet uses the only function and then uses the print function to print the returned result, an AttributeError is generated

[gck123]

Describe the bug
版本：tortoise-orm==0.21.6
这是我的模型定义

class ModelResults(Model):
    id = fields.IntField(pk=True)
    score = fields.FloatField(default=0, description="评测分数")
    total = fields.IntField(description="总用例数")
    failed = fields.IntField(description="失败用例数")
    passed = fields.IntField(description="通过用例数")
    major_type = fields.CharField(max_length=100, null=True, description="大指标")
    small_type = fields.CharField(max_length=100, null=True, description="小指标")
    ai_model = fields.ForeignKeyField(model_name="models.AIModels", null=True, on_delete=SET_NULL)
    task = fields.ForeignKeyField(model_name="models.Tasks", null=True, on_delete=SET_NULL)

    class Meta:
        table = "tb_model_results"

下面2句是触发问题的代码

res = await ModelResults.filter(ai_model=ai_model).only("score", "major_type").all()
print(res)

当我的模型使用only函数后，如果我在下面对其结果进行打印，会产生AttributeError: 'ModelResults' object has no attribute 'id'
因为Model中的__repr__函数对self.pk进行了判断，最终会走到_get_pk_val函数，由于我使用了only函数所以返回的对象中并没有id这个属性，所以在使用getattr时报了错

以下是出错的地方

def _get_pk_val(self) -> Any:
        return getattr(self, self._meta.pk_attr)

[abondar]

Merged #1724