前台测试时数据写在vuex的state里面的数据是这样的

articleList: [
    {
      userinfo: {src: 'static/img/3.jpeg', user: 'eee', text: '嘿嘿', time: '十天前'},
      content: {href: '2222222', text: 'test', create_time: '', updata_time: ''},
      pic: [{path: 'static/img/0.jpg'}, {path: 'static/img/1.jpg'}, {path: 'static/img/3.jpeg'}],
      info: {like: [555, 666], status: [false, false]},
      isFollow: true
    }
  ]

得到后台的数据后this.state.articleList = data

现在在后台模拟返回一个数据 数据不是查询数据库后得到的 而是直接把前台测试的这个数据改一下拿到后台直接返回 现在我改成json字符串了 前台可以接收到数据 但是用的话不行 很多字段会提示未定义TypeError: Cannot read property 'src' of undefined" 如果想让前台接收到这个数据后拿来用的话还应该对数据进行处理吗？

$b='{
            "userinfo": {"src": "static/img/3.jpeg", "user": "eee", "text": "嘿嘿", "time": "十天前"},
            "content": {"href": "2222222", "text": "test", "create_time": "", "updata_time": ""},
            "pic": [{"path": "static/img/0.jpg"}, {"path": "static/img/1.jpg"}, {"path": "static/img/3.jpeg"}],
            "info": {"like": [555, 666], "status": [false, false]},
            "isFollow": true
}';
return $b;