Python 基于模型元数据的通用导出模块：为foreignKey而不是模型类返回一个整数（使用值列表）

我尝试实现一个基于元数据模型的通用导出模块

它的工作原理是，对于foreignKey，除了返回整数而不是模型类的值

# Patient
(1, False, 'CI-S1-0001', 5, 'admin', datetime.datetime(2021, 5, 31, 7, 26, 20, 393305, tzinfo=<UTC>))
# Inclusion
(1, False, 1, datetime.date(2021, 5, 23))

---

我找到了一个解决方案，使用带有QuerySet的annotate字段返回相关模型的字段值

class Patient(models.Model):
    ...
    ide = models.AutoField(primary_key=True)
    ver = models.BooleanField("Fiche verrouillée", null=True, blank=True, default=False)
    pat = models.CharField("Patient",max_length=11, unique=True, null=True, blank=True, error_messages={'unique':'Un patient avec ce code existe déjà'})
    pat_sit = models.ForeignKey('parameters.Site',on_delete = models.CASCADE, related_name='patient_site', db_column='pat_sit')
    ...

    class Meta:

        db_table = 'crf_pat'
        verbose_name_plural = 'Patients'
        ...

    def __str__(self):
        return f"{self.ide} - {self.pat}"

class Inclusion(models.Model):
    ...
    pat = models.ForeignKey('Patient',on_delete = models.CASCADE, related_name='inclusion_patient', db_column='pat')
    ...
    log = HistoricalRecords()

    ...

...
        app_models = apps.get_app_config('ecrf').get_models()
        for model in app_models:
           columns = [str(field_name).split('.')[-1] for field_name in model._meta.concrete_fields]
           results = model.objects.all().values_list(*columns)
                    
                    q = Q()
                    if model._meta.model.__name__ == 'Patient':      
                        for site in sites:
                            q = q | Q(pat__icontains=site)                        
                    else:
                        for site in sites: # sites is a list 
                            q = q | Q(pat__pat__icontains=site)

                    for row in results.filter(q).values_list(*columns):
                        print(row)
                        row_num += 1
                        for col_num in range(len(row)):
                            print('row_num',row_num)
                            print('col_num',col_num)
                            print('row[col_num]',row[col_num])
                            ws.write(row_num, col_num, row[col_num], normal_style)