AngularJS ng-repeat array with unique $scope variables per item

问题

So I am building a food order form and I have a list of options that need to be attached to the individual item index and not to the parent.. As of right now everything works but when i add an option to one product in the array all products have the same value added... ie.. if i choose the vanilla option for latte all drinks in the ng-repeat array will have the vanilla option set to true.. here is what i have..

first here is the html markup of the options view

<md-card ng-repeat="item in items.results | filter:true">
     <img ng-src="{{item.img}}" 
          class="md-card-image" 
          alt="">
          <md-card-content class="content">
              <h2 class="md-title">{{ item.name }}</h2>
              <h4>{{ item.price | currency }}</h4>
              {{flavors(item)}}
              <md-list>
                  <p class="md-subhead">Choose Your Flavor</p>
                  <md-divider></md-divider>
                  <md-list-item ng-repeat="option in options.results" 
                                layout="row">
                      <p> {{ option.name }} </p>
                      <span flex></span>
                      <p> {{ option.price | currency}} </p>
                      <md-checkbox aria-label="option.active"
                                   class="md-accent" 
                                   ng-model="option.active"></md-checkbox>
                  </md-list-item>
              </md-list>
           </md-card-content>
           <md-action-bar layout="row" 
                          layout-align="end center">
                          <md-button class="md-fab md-accent fab" 
                                     aria-label="Remove From Cart" 
                                     ng-click="remove(item)"                               
                                     ng-class="{active:item.active}">
                                     <md-icon md-svg-src="img/icons/remove.svg"></md-icon>
                          </md-button>
            </md-action-bar>
 </md-card>

as you can see i have an array of items all with an array of options

here is the factory that retrieves the data from Parse

app.factory('ParseData', function($http) {
var ParseFactory = {};

ParseFactory.getItems = function() {

return $http({method : 'GET',url : 'https://api.parse.com/1/classes/DrinkMenu/', headers: 
  { 'X-Parse-Application-Id':xxx',
    'X-Parse-REST-API-Key':'xxx'}})
    .then(function(response) {
        return response.data;
    });
};

ParseFactory.getOptions = function() {

return $http({method : 'GET',url : 'https://api.parse.com/1/classes/Options/', headers: 
  { 'X-Parse-Application-Id':'xxx',
    'X-Parse-REST-API-Key':'xxx'}})
    .then(function(response) {
        return response.data;
    });
};

return ParseFactory;

}); 

and lastly the controller

app.controller('AppController', function($scope, ParseData){

  ParseData.getItems().then(function(data) {
        $scope.items = data;
        }).catch(function() {
        alert('error');
  });

  ParseData.getOptions().then(function(data) {
        $scope.options = data;
        }).catch(function() {
        alert('error');
  });

  });

I know this is a little confusing to follow but i tried to explain the issues as best i could.. thanks for taking a look..

回答1:

You should put the flavor model inside the item, not a general model as you are doing. The way you are doing the item from the list of options.results has the active one, then It will change every selection that uses the options.results. Change to:

<md-checkbox aria-label="option.active" class="md-accent" 
 ng-model="item.flavor[$index]"></md-checkbox>

OR

<md-checkbox aria-label="option.active" class="md-accent" 
 ng-model="item.flavor[option.name]"></md-checkbox>

来源：https://stackoverflow.com/questions/29931187/angularjs-ng-repeat-array-with-unique-scope-variables-per-item