Not render survey in vue component

I get survey from data jsonb, and get to component
My code:

Code
<template lang="pug"> 
  survey(:survey="survey_render")
</template>

<script lang="coffee">
  import { Survey } from 'survey-vue-ui'
  import { StylesManager, Model } from 'survey-core' 
  import 'survey-core/survey.min.css';
  StylesManager.applyTheme("survey")
  surveyJson = {"logoPosition":"right","pages":[{"name":"page1","elements":[{"type":"checkbox","name":"question1","title":"как дела","choices":      [{"value":"item1","text":"хорошо"},{"value":"item2","text":"норм"}],"hasSelectAll":true,"selectAllText":"все"},  {"type":"text","name":"question2","title":"все ок?"}]}]}

  export default { 
    components: {
      Survey
    }
    props: { survey_item: { type: Object } }

    data: ->  
      {
        survey_render: new Model(@survey_item)
      }
  }
</script>

and this message is render(attached pic)
But, i tried the same json hash from surveyJson variable and it renders