Django模型M类中的公共变量

Question

我对varaibles示波器有点问题。 代码：

class Report(django_filters.FilterSet):
    def __init__(self):
        self.main_fields = []
    class Meta:
        model = ReportData
        fields = self.main_fields

class OtherReport(ReportData):
    fields_to_base_class = ['somefields']

class OtherReport2(ReportData):
    fields_to_base_class = ['othersomefields']

我该怎么做？Django在Meta中看不到主字段。你知道吗