from django.contrib import admin    # Register your models here.  import xlwt  from django.http import HttpResponse    from dal import models  # Register your models here.    from openpyxl import Workbook      class FundAdmin(admin.ModelAdmin):      actions = ["export_as_excel"]      list_display = ('title', 'name','type','unit','status','create_time')      list_filter = ['title', 'name','type','unit','status','create_time',]          def export_as_excel(self, request, queryset):          print("queryset",queryset)          meta = self.model._meta  # 用于定义文件名, 格式为: app名.模型类名          print("meta",meta)          field_names = [field.name for field in meta.fields]  # 模型所有字段名            response = HttpResponse(content_type='application/msexcel')  # 定义响应内容类型          response['Content-Disposition'] = f'attachment; filename={meta}.xlsx'  # 定义响应数据格式          wb = Workbook()  # 新建Workbook          ws = wb.active  # 使用当前活动的Sheet表          ws.append(field_names)  # 将模型字段名作为标题写入第一行          for obj in queryset:  # 遍历选择的对象列表              print(obj)              for field in field_names:                    data = [f'{getattr(obj, field)}' for field in field_names]  # 将模型属性值的文本格式组成列表                ws.append(data)  # 写入模型属性值          wb.save(response)  # 将数据存入响应内容          return response          export_as_excel.short_description = '导出Excel'  # 该动作在admin中的显示文字        admin.site.register(models.Fund, FundAdmin)