直接上程式碼

定義一個upload_img來返回顯示圖片的html
定義顯示圖片說明和allow_tags
mark_safe方法於django.utils.safestring匯入

from django.utils.safestring import mark_safe
from django.contrib import admin

@admin.register(AliOSSFile)
class AliOssUploadAdmin(admin.ModelAdmin):
    def upload_img(self, obj):
        try:
            img = mark_safe('<img src="%s" width="50px" />'
 
 % (obj.file.url,))
        except Exception as e:
            img = ''
        return img
    upload_img.short_description = 'Thumb'
    upload_img.allow_tags = True

    list_display = ['id', 'ali_id', 'file', 'upload_img', 'created_time']
    readonly_fields = ['upload_img']