用到@api_view装饰器时,访问路由查看api数据时,报错: AssertionError: Cannot apply DjangoModelPermissionsOrAnonReadOnly on a view that does not set `.queryset` or have a `.get_queryset()` method. 按照官网教程(http://www.django-rest-framework.org/),在settings文件里写入的设置为 REST_FRAME…

This lesson will teach you how to apply grouping to List View data. For this purpose, you will group Contact List View data by the Department property. 本课将教您如何将分组应用于列表视图数据.为此,您将按"部门"属性对联系人列表视图数据进行分组. Note 注意 Before proceeding, take a moment to r…

permissions.py源码分析 SAFE_METHODS = ('GET', 'HEAD', 'OPTIONS') #GET请求,HEAD获取头部信息,OPTIONS获取可用请求类型设置为安全方法 #POST,PUT,PATCH,DELETE都会修改数据,没有加到这个元组 @six.add_metaclass(BasePermissionMetaclass) class BasePermission(object): """ A base class from whic…

drf的权限类位于permission模块   如何确定权限 认证.限流,权限决定是否应该接收请求或拒绝访问 权限检查在视图的最开始处执行,在继续执行其他代码前 权限检查通常会使用request.user和request.auth属性中的身份认证信息来决定是否允许请求 不同级别的用户访问不同的api过程中,使用权限来控制访问的许可 DRF框架的权限被定义为一个权限类的列表,表示拥有列表中所有类型的权限 在运行视图代码主体之前,会检查列表中的每个权限 任何一个权限检查失败的话,会抛出 except…

Custom Components In this document The Basic Approach Fully Customized Components Compound Controls Modifying an Existing View Type Android offers a sophisticated and powerful componentized model for building your UI, based on the fundamental layout…

发布在我的网站 http://kesenhoo.github.io/blog/2013/06/30/android-training-ui-creating-custom-views-lesson-1/ ,欢迎访问! 设计良好的类总是相似的.它使用一个好用的接口来封装一个特定的功能,它有效的使用CPU与内存,等等.为了成为一个设计良好的类,自定义的view应该: 遵守Android标准规则. 提供自定义的风格属性值并能够被Android XML Layout所识别. 发出可访问的事件. 能够兼容…

chooseVideo(e) { this.fileInfo = {} let that = this wx.chooseVideo({ sourceType: ['album', 'camera'], maxDuration: 60, camera: 'back', success: function(res) { that.fileInfo = res that.$apply()   // 页面有变化 } }) this.$apply() // 页面无变化 }   <view> <v…

当Dialog有编辑框时如果选择会弹菜单窗口就不要用 Context applicationContext = mainActivity.getApplicationContext(); AlertDialog.Builder dlgBuilder = new AlertDialog.Builder(applicationContext); AlertDialog dialog = dlgBuilder.create(); dialog.getWindow().setType(WindowMan…

Views Because view objects are the main way your application interacts with the user, they have many responsibilities. Here are just a few: 因为视图对象是应用程序跟用户交互的主要方式,所以它们有很多责任.以下是其中一小部分: Layout and subview management 布局和子视图管理 A view defines its own defau…

Resource Management in View Controllers 视图控制器的资源管理 View controllers are an essential part of managing your app’s resources. View controllers allow you to break your app up into multiple parts and instantiate only the parts that are needed. But more t…