class UserAdmin(admin.ModelAdmin):
    fields = ('user',)

class UserAdmin(admin.ModelAdmin):
    exclude = ('user',)

class UserAdmin(admin.ModelAdmin):
    readonly_fields = ('user',

class UserAdmin(admin.ModelAdmin):
    fieldsets = (
        ('基本数据', {
            'fields': ('user', 'pwd', 'ctime',)
        }),
        ('其他', {
            'classes': ('collapse', 'wide', 'extrapretty'),  # 'collapse','wide', 'extrapretty'
            'fields': ('user', 'pwd'),
        }),
    )

class UserAdmin(admin.ModelAdmin):
    filter_vertical = ("m2m字段",) # 或filter_horizontal = ("m2m字段",)

class UserAdmin(admin.ModelAdmin):
    ordering = ('-id',)
    或
    def get_ordering(self, request):
        return ['-id', ]

view_on_site = False
或
def view_on_site(self, obj):
    return 'https://www.baidu.com'

radio_fields = {"ug": admin.VERTICAL} # 或admin.HORIZONTAL

class UserAdmin(admin.ModelAdmin):
    # show_full_result_count = True # 1 result (12 total)
    # show_full_result_count = False  # 1 result (Show all)
    search_fields = ('user',)