Question

我收到下面显示的eval错误，但我程序中的所有内容都处于正常工作状态，所以我想知道为什么我会这样做？没有迹象表明问题位于堆栈跟踪的位置。 isChecked(field, value)是一个函数，它返回一个布尔值，我在ng-model属性中评估约{70}个ng-repeat生成的Eval Error: Cannot assign to isChecked(field, val) while evaling [isChecked(field, val)] FROM: #0 Expression.assign (package:angular/core/parser/syntax.dart:45:7) #1 _UnwrapExceptionDecorator.assign (package:angular/core/parser/parser.dart:125:26) #2 BoundExpression.assign (package:angular/core/parser/syntax.dart:60:41) #3 NgModel.modelValue= (package:angular/directive/ng_model.dart:211:11) #4 NgModel.viewValue= (package:angular/directive/ng_model.dart:200:5) #5 InputCheckbox.InputCheckbox.<anonymous closure>.<anonymous closure> (package:angular/directive/ng_model.dart:318:19) #6 NgModelOptions._runFuncDebounced (package:angular/directive/ng_model_options.dart:80:11) #7 NgModelOptions.executeChangeFunc (package:angular/directive/ng_model_options.dart:68:20) #8 InputCheckbox.InputCheckbox.<anonymous closure> (package:angular/directive/ng_model.dart:317:49) #9 _rootRunUnary (dart:async/zone.dart:915) #10 _ZoneDelegate.runUnary (dart:async/zone.dart:510) #11 VmTurnZone._onRunUnary.<anonymous closure> (package:angular/core/zone.dart:122:55) #12 VmTurnZone._onRunBase (package:angular/core/zone.dart:104:16) #13 VmTurnZone._onRunUnary (package:angular/core/zone.dart:122:7) #14 _CustomZone.runUnary (dart:async/zone.dart:811) #15 _CustomZone.runUnaryGuarded (dart:async/zone.dart:717) #16 _CustomZone.bindUnaryCallback.<anonymous closure> (dart:async/zone.dart:743) STACKTRACE: #0 _UnwrapExceptionDecorator.assign (package:angular/core/parser/parser.dart:127:7) #1 BoundExpression.assign (package:angular/core/parser/syntax.dart:60:41) #2 NgModel.modelValue= (package:angular/directive/ng_model.dart:211:11) #3 NgModel.viewValue= (package:angular/directive/ng_model.dart:200:5) #4 InputCheckbox.InputCheckbox.<anonymous closure>.<anonymous closure> (package:angular/directive/ng_model.dart:318:19) #5 NgModelOptions._runFuncDebounced (package:angular/directive/ng_model_options.dart:80:11) #6 NgModelOptions.executeChangeFunc (package:angular/directive/ng_model_options.dart:68:20) #7 InputCheckbox.InputCheckbox.<anonymous closure> (package:angular/directive/ng_model.dart:317:49) #8 _rootRunUnary (dart:async/zone.dart:915) #9 _ZoneDelegate.runUnary (dart:async/zone.dart:510) #10 VmTurnZone._onRunUnary.<anonymous closure> (package:angular/core/zone.dart:122:55) #11 VmTurnZone._onRunBase (package:angular/core/zone.dart:104:16) #12 VmTurnZone._onRunUnary (package:angular/core/zone.dart:122:7) #13 _CustomZone.runUnary (dart:async/zone.dart:811) #14 _CustomZone.runUnaryGuarded (dart:async/zone.dart:717) #15 _CustomZone.bindUnaryCallback.<anonymous closure> (dart:async/zone.dart:743)属性。如果这是一个问题的任何帮助和建议，将不胜感激：）

  <fieldset ng-repeat="field in $.filterFields">
      <legend>Filter by {{field}}</legend>
      <span ng-repeat="val in $.getValuesForField(field)">
          <label>{{val}}</label>
          <input type="checkbox" ng-click="$.checkboxClicked(field, val)" ng-model="isChecked(field, val)">
      </span>
  </fieldset>

复选框的HTML：

bool isChecked(String key, String value){
    if(alertFilter.containsKey(key) && alertFilter[key].contains(value)) {
      return true;
    }
    else{
      return false;
    }
}

isChecked的源代码：

sqlite3_step

P.S。这里的'alertFilter'是从服务中获得的。更新alertFilter时会触发错误 - 这会触发共享此过滤器的程序的其他4个部分进行更新。请注意，这些其他部分不会更新alertFilter，它们只会从中读取。

AngularDart中的Eval错误

0 个答案: