请教一下 要存点评了几颗星到云数据库并展示出来，请问存哪个字段？

WXML

<view class='card'>

<!-- 为方便数据定位，自定义了wx:for-item为i -->

<block wx:for='{{evaluations}}' wx:for-item='i' wx:key=''>

<!-- 单个卡片项 -->

<view class='card-item'>

<!-- 卡片上方标题 -->

<view class='item-title'>

<view class='image-container title-image'>

<image src='{{i.image}}'></image>

</view>

<view class='title-text'>{{i.name}}</view>

</view>

<!-- 卡片下方评价区 -->

<view class='item-content'>

<view class='image-container content-image'>

<image src='{{evaluationImgUrl}}'></image>

</view>

<view class='contet-text content-body'>

<!-- 为方便数据定位，自定义了wx:for-item为j -->

<block wx:for='{{starMap}}' wx:for-item='j' wx:key=''>

<view class='image-container' data-index='{{i.id}}' bindtap='chooseStar'>

<image wx:if='{{i.star >= index + 1}}' data-star='{{index + 1}}' src='{{starCheckedImgUrl}}' bin ></image>

<image wx:if='{{i.star < index + 1}}' data-star='{{index + 1}}' src='{{starUnCheckedImgUrl}}'></image>

</view>

</block>

<text class='note'>{{i.note}}</text>

</view>

</view>

</view>

</block>

</view>

WXSS

// 评价图片

evaluationImgUrl: "https://s1.ax1x.com/2018/08/05/PDM8Bj.png",  //评字图片

starCheckedImgUrl: "https://s1.ax1x.com/2018/08/05/PDQ0it.png", //点亮时图片

starUnCheckedImgUrl: "https://s1.ax1x.com/2018/08/05/PDQdII.png", //熄灭时图片

// // 建议内容

// opinion: "",

starMap: [

'非常差',

'差',

'一般',

'好',

'非常好',

],

evaluations: [{

id: 0,

name: "服务态度",

image: "https://s1.ax1x.com/2018/08/05/PDMaCV.png",

star: 0,

note: ""

},

{

id: 1,

name: "工作效率",

image: "https://s1.ax1x.com/2018/08/05/PDMd3T.png",

star: 0,

note: ""

},

{

id: 2,

name: "工作质量",

image: "https://s1.ax1x.com/2018/08/05/PDMN40.png",

star: 0,

note: ""

}

]

},

JS

/**

  * 评分

  */

chooseStar: function(e) {

const index = e.currentTarget.dataset.index;

const star = e.target.dataset.star;

let evaluations = this.data.evaluations;

let evaluation = evaluations[index];

console.log(evaluation)

evaluation.star = star;

evaluation.note = this.data.starMap[star - 1];

this.setData({

evaluations: evaluations

})

},