错误：已达到 rootScope:infdig 10 $digest() 迭代。中止

Question

我创建了一个带有一些范围参数的自定义指令。我使用 watchGroup 来更改传入参数。这是指令的一部分：

 scope.$watchGroup(['repairer', 'initial'], function() {

          if (scope.initial) {
            scope.Repairer = scope.initial;

          } else {
            scope.Repairer = scope.repairer;
          }

          console.log('scope.Repairer value:', scope.Repairer);

          if (scope.Repairer) {

            console.log('wooohoo calling scriptservice');

            scriptingService.getScript(scope.request).then(function(scripts) {
              scope.scripts = scripts;
            });
          } else {
            scope.scripts = null;
          }
        });

我在我的页面中使用如下指令：

<scripting repairer="repairer" request="getRequest(repairer,initial)" initial="initial" />

更新：在玩了一会儿之后，我认为问题在于 getRequest 方法而不是 watchGroup 语句。

为什么我现在收到此错误：

   Error: [$rootScope:infdig] 10 $digest() iterations reached. Aborting!
Watchers fired in the last 5 iterations: [[{"msg":"fn: regularInterceptedExpression","newVal":{"allocationProcess":"direct","allocationSource":"internal","brand":"popie","includeSegment":false,"relationship":"lol","ruralSearch":true,"state":"VIC"},"oldVal":{"allocationProcess":"direct","allocationSource":"internal","brand":"popie","includeSegment":false,"relationship":"lol","ruralSearch":true,"state":"VIC"}}],[{"msg":"fn: regularInterceptedExpression","newVal":{"allocationProcess":"direct","allocationSource":"internal","brand":"popie","includeSegment":false,"relationship":"lol","ruralSearch":true,"state":"VIC"},"oldVal":"<<already seen>>"}],[{"msg":"fn: regularInterceptedExpression","newVal":{"allocationProcess":"direct","allocationSource":"internal","brand":"popie","includeSegment":false,"relationship":"lol","ruralSearch":true,"state":"VIC"},"oldVal":"<<already seen>>"}],[{"msg":"fn: regularInterceptedExpression","newVal":{"allocationProcess":"direct","allocationSource":"internal","brand":"popie","includeSegment":false,"relationship":"lol","ruralSearch":true,"state":"VIC"},"oldVal":"<<already seen>>"}],[{"msg":"fn: regularInterceptedExpression","newVal":{"allocationProcess":"direct","allocationSource":"internal","brand":"popie","includeSegment":false,"relationship":"lol","ruralSearch":true,"state":"VIC"},"oldVal":"<<already seen>>"}]]

这是一个 plunker 参考：http://plnkr.co/edit/dSkjP1Vkvwd4fVauiFqa?p=preview

Answer 1

Angular 1.x 摘要是围绕脏检查构建的。所以通常绑定到一个函数并不是一个好主意，因为这时 angular 将需要执行这个函数来查看双向绑定值是否发生了变化。在这种情况下，getRequest() 函数将是有问题的函数。 如果您将getRequest() 的结果绑定到主控制器中的一个变量，然后将该变量绑定到您的指令，那么您应该很高兴。