# 重寫formfield_for_dbfield，設計add和edit表單
  def formfield_for_dbfield(self, db_field, **kwargs):
    if not self.request.user.is_superuser:
     # 對case這個表項的下拉框選擇進行過濾
      if db_field.name == "case": 
        kwargs["queryset"] = Case.objects.filter(case_owner=self.request.user).order_by('id')                        
      # 對assigned_recipient這個表項的下拉選擇進行過濾
      # 并且需要用到外鍵
      if db_field.name == "assigned_recipient":
        stu_ids = StudentDoctor.objects.filter(doctor=self.request.user).values('student_id')
        ids = []
        # 這里使用循環(huán)，為了下方再次查詢時在list中使用in
        for id in stu_ids:
          ids.append(id['student_id'])
  # 根據主鍵在ids列表中查詢得到Queryset。注意kwargs["queryset"]一定是queryset
        kwargs["queryset"] = User.objects.filter(pk__in=ids)
      return db_field.formfield(**dict(**kwargs))

    else:
      attrs = self.get_field_attrs(db_field, **kwargs)
      return db_field.formfield(**dict(attrs, **kwargs))

<label class="control-label col-md-3 col-sm-3 col-xs-12" for="first-name">角色<span class="required"></span>
</label>
<select name="name">
  {% for name in data_list %}
  <option id="name" value="{{ name }}">{{ name }}</option>
  {% endfor %}
</select>