ng-model范围输入类型无法上传

Question

使用ionic angularjs，尝试传递我的值以将其上传到服务器 Nots：上传工作但只是默认值，如果我使用默认值更改值stil上传

我的HTML

<section class="item" ng-repeat="survey in surveys.questions">
      <p>{{survey.displayTitle}} <i class="fa fa-check" aria-hidden="true"></i></p>
      <div class="range">
        <i class="icon ion-sad"></i>
        <input type="range" min="{{min}}" max="{{max}}" name="range" id="{{survey.id}}"  ng-model='modelValue'>
        <span class="modelValue">{{modelValue}}<span></span></span>
        <i class="icon ion-happy"></i>
      </div>
    </section>

    <button class="button button-block button-assertive" ng-click="survey(modelValue)">
      <span ng-hide="loading">Submit <i class="fa fa-paper-plane" aria-hidden="true"></i></span>
      <span ng-show="loading">Please wait <i class="fa fa-spinner fa-spin"></i></span>
    </button>

我的控制器

app.controller('surveyController', function($scope, $state, $http, $rootScope, Authorization, sharingDataService, $localStorage, $location){

    if (sharingDataService.getUser()) {
        $scope.user = sharingDataService.getUser().data.accounts[0];
    }
    $scope.$on('getUserInfo', function(){
        $scope.user = sharingDataService.getUser().data.accounts[0];
    });


    $scope.min = 0;
    $scope.max = 6;
    $scope.modelValue = 3;

    // get survey url 
    $http.post(sharingDataService.getApiUrl() + '/app/survey/get').then(
        function (data) {
            $scope.surveys = data.data.survey[0];

        }
    );

    $scope.loading = false;

    // on click survey
    $scope.survey = function(modelValue){
        $scope.loading = true;
        // post survey question to database
        var obj = $scope.surveys.questions;
        var answers = [];
        var questionId = 1;
        angular.forEach(obj, function(value, key) {
            value.modelValue = modelValue;
            answers.push({"questionId" : questionId, "value" : value.modelValue});
            console.log({"questionId" : questionId, "value" : value.modelValue});
            questionId++;
        });

        $http.post(sharingDataService.getApiUrl() + '/app/survey/saveAnswers', {
                "answers" : answers}
        ).then(function (data) {
            $state.transitionTo('thanks');
            console.log(answers);
        });


    }
});

作者注释：如果我添加到ng-model ='survey.modelValue'一切正常，但是在前端你看到输入范围被禁用，用户必须移动它才能获得值。我主要是没有默认值添加