xadmin 关闭添加和删除功能

在adminx.py中

class sysinfo_admin(object):
    list_display = ['sys_title', 'image_img', 'view']
    search_fields = ['sys_title', 'view']
    list_filter = ['sys_title', 'view']
    readonly_fields = ['view']

    def has_delete_permission(self, request=None):
        # Disable delete
        return False

    def has_add_permission(self, request=None):
        # Disable delete
        return False