polymer retrieving data from sub elements -

i have following dom repeat, takes array of survey question , displays them.

<template is="dom-repeat" items="{{survey.questions}}">   <template is="dom-if" restamp if="{{isformat(item.type, 'single-select')}}">     <question-singleselect question="{{item}}" auth-data="{{authdata}}"></question-singleselect>   </template>   <template is="dom-if" restamp if="{{isformat(item.type,'open-ended')}}">     <question-openended question="{{item}}" auth-data="{{authdata}}"></question-openended>   </template> 

and in code further down, want take answers, , create header record, , detail/answer records... header, can save no problem, detail records, trying following.

for(question in survey.questions)  {    ... } 

getting error message, 'survey cannot found'. how can gain access array of questions displaying on page? have tried this.$. , other different things found on web , site.

well instead of survey.questions. seemed had give dom-repeat id , reference id following:

<template is="dom-repeat" id="testquestions" items="{{survey.questions}}"> ... ... var item = this.$.testquestions;