································场景1································ 控制器：$model->scenario=‘update’;//指定场景$model -> save();模型中：public function rules() { return [ [’name’,‘required’,‘message’=>‘用户名不能为空’], [‘age’,‘required’,‘message’=>‘年龄不能为空’,‘on’=>‘create’], [‘pwd’,‘required’,‘message’=>‘密码不能为空’,‘on’=>‘update’] ];}结果：验证name和pwd································场景2································ 控制器：$model->scenario=‘update’;$model -> save();模型中：public function rules(){ return [ [’name’,‘required’,‘message’=>‘用户名不能为空’], [‘age’,‘required’,‘message’=>‘年龄不能为空’,‘on’=>‘create’], [‘pwd’,‘required’,‘message’=>‘密码不能为空’,‘on’=>‘update’], [’level’,‘required’,‘message’=>‘等级不能为空’,‘on’=>‘update’], ];}public function scenarios(){ return [ ‘update’=>[‘pwd’], ]}结果：验证pwd································场景3································ 控制器：$model -> save();模型中：public function rules(){ return [ [’name’,‘required’,‘message’=>‘用户名不能为空’], [‘age’,‘required’,‘message’=>‘年龄不能为空’,‘on’=>‘create’], ];}public function scenarios(){ return [ ‘update’=>[‘pwd’], ];}结果： 报错，缺少场景································场景4································ 控制器：$model -> save();模型中：public function rules(){ return [ [’name’,‘required’,‘message’=>‘用户名不能为空’], [’level’,‘required’,‘message’=>‘等级不能为空’], [‘age’,‘required’,‘message’=>‘年龄不能为空’,‘on’=>‘create’], ];}public function scenarios(){ return [ ‘update’=>[‘pwd’], ‘default’=>[’name’] ];}结果：验证name································场景5································ 控制器：$model -> save();模型中：public function rules(){ return [ [’name’,‘required’,‘message’=>‘用户名不能为空’], [‘age’,‘required’,‘message’=>‘年龄不能为空’,‘on’=>‘create’], ];}结果：验证name