聚合物byutv-jsonp / iron-ajax无反应

时间:2017-05-06 23:09:21

标签: ajax polymer iron-ajax

我一直试图从GW2服务器获取json数据,由于跨域问题,它不能与iron-ajax一起使用。比我尝试过这个byutv-jsonp而且有用了。

现在的问题是我得到了正确数据的响应,但它没有触发响应处理程序。所以数据永远不会放在变量中:/

任何人都有提示,提示或线索?!

byutv的来源 http://coderfin.github.io/byutv-jsonp/components/byutv-jsonp/

<dom-module id="about-pagina">
 <template>
 <style include="shared-styles">
 :host {
 display: block;
 }
 </style>

 <h1>about-pagina</h1>
 <vaadin-grid id="grid" items="[[_c_studenten]]" selected-items="{{selected}}">
       <vaadin-grid-column>
         <template class="header">Account Name</template>
         <template>
           <div class="capitalized">[[item.name]]</div>
         </template>
       </vaadin-grid-column>

       <vaadin-grid-column>
         <template class="header">Rank</template>
         <template>
           <div class="capitalized">[[item.rank]]</div>
         </template>
       </vaadin-grid-column>

       <vaadin-grid-column>
         <template class="header">Date Joined</template>
         <template>
           <div class="capitalized">[[item.joined]]</div>
         </template>
       </vaadin-grid-column>

       <vaadin-grid-column>
         <template class="header">Docent</template>
         <template>
           <div class="capitalized">[[item.docent]]</div>
         </template>
       </vaadin-grid-column>
       <vaadin-grid-column>
         <template class="header">Lokaal</template>
         <template>
           <div class="capitalized">[[item.locatie]]</div>
         </template>
       </vaadin-grid-column>
         <vaadin-grid-column>
           <template class="header">Klas</template>
           <template>
             <div class="capitalized">[[item.klas]]</div>
           </template>
         </vaadin-grid-column>
       </vaadin-grid-column>
     </vaadin-grid>
     <paper-button on-tap="derp" raised>Annuleren</paper-button>

 <byutv-jsonp
   id="ajax_members_get"
   method="GET"
   url="https://api.guildwars2.com/v2/guild/secretcode/members"
   params='{"access_token":"secretcode"}'
   handle-as="json"
   last-response="{{_c_studenten}}"
   on-response="_members_get_response_handler">
 </byutv-jsonp>

 </template>
 <script>
 Polymer({
 is: 'about-pagina',
 properties: {
   c_visible: {
     type: Boolean,                                      /* true when element is the active visible item */
     value: false,
     observer: '_initializing',
   },
   _c_studenten: {
     type: Array,
   },
 },
 _initializing : function() {
   if (this.c_visible) {
      console.log("about-pagina");
      this._members_get_request_handler();
   }
 },
 _members_get_request_handler: function() {
   console.log("_members_get_request_handler");
   this.$.ajax_members_get.contentType="application/json";
   this.$.ajax_members_get.body={
   };
   this.$.ajax_members_get.generateRequest();
 },

 _members_get_response_handler: function(request) {
   console.log("_members_get_response_handler aantal studenten="+request.detail.response.length);
   this._c_studenten = request.detail.response;
 },
 derp: function(){
   console.log([[_c_studenten]]);
 }
 });
 </script>
</dom-module>

1 个答案:

答案 0 :(得分:0)

当您在_c_studenten函数中指定_members_get_response_handler的值时,可以从last-response="{{_c_studenten}}"中删除iron-ajax。这可以防止将值设置两次。现在,您可以确保数据在Array中而不是Object(vaadin-grid需要数组数据)。这可能就是诀窍。如果没有,请确保iron-ajax获取的数据格式。