如何在 django-import-export 中导出 ForeignKeyWidget

如何解决如何在 django-import-export 中导出 ForeignKeyWidget

我认为可以导出 ForeignKey 字段。我试过了，但没有用。我哪里错了？？首先有可能吗？？？

class ExportAllIssuesResource(resources.ModelResource):
    book_id__reg_no = fields.Field(attribute='book_id__reg_no',column_name='reg no.')
    book_id__book_name = fields.Field(attribute='book_id__book_name',column_name='book name')
    borrower_id__name = fields.Field(attribute='borrower_id__name',column_name='student')
    borrower_id__student_id = fields.Field(attribute='borrower_id__student_id',column_name='adm')
    borrower_teacher__code = fields.Field(attribute='borrower_teacher__code',column_name='t_code',widget=ForeignKeyWidget(TeacherIssue,'code'))
    borrower_teacher__name = fields.Field(attribute='borrower_teacher__name',column_name='t_name','name'))
    def export(self,queryset = None,*args,**kwargs):
        queryset = Issue.objects.all().filter(borrower_id__school = kwargs['school'])
        return super().export(queryset,**kwargs)
    class Meta:
        model = Issue
        fields = ('book_id__reg_no','book_id__book_name','borrower_id__name','borrower_id__student_id','issue_date','borrower_teacher__code','borrower_teacher__name')
        export_id_fields = ('book_id__reg_no',)
        export_order = ('book_id__reg_no','borrower_teacher__name')

视图

def ExportAllIssuesView(request):
    dataset = ExportAllIssuesResource().export(school = request.user.school)
    response = HttpResponse(dataset.xls,content_type='application/vnd.ms-excel')
    response['Content-disposition'] = 'attachment; filename="All issues.xls"'
    return response

模型。

class Issue(SafeDeleteModel):
    _safedelete_policy = SOFT_DELETE
    borrower_id = models.ForeignKey(Student,on_delete=models.CASCADE)
    book_id = models.ForeignKey(Books,on_delete=models.CASCADE)
    issue_date = models.DateField(default=datetime.date.today)
    issuer = models.ForeignKey(CustomUser,on_delete=models.CASCADE)
    def __str__(self):
        return str(self.book_id)

class TeacherIssue(SafeDeleteModel):
    _safedelete_policy = SOFT_DELETE
    borrower_teacher = models.ForeignKey(Teachers,on_delete=models.CASCADE)
    def __str__(self):
        return str(self.book_id)