admin.py 文件源码

def get_related_to(model_class, target_model):
    related = []
    if model_class == target_model:
        return ['email']
    for field in model_class._meta.fields:
        if isinstance(field, ForeignKey):
            if field.rel.to == target_model:
                related = [field.name, 'email']
            else:
                related.extend(get_related_to(field.rel.to, target_model))
    return related