【报Bug】where:方式1. 使用模板字符串，用${}包裹变量 bug

示例代码：

<unicloud-db ref="udb" collection="hamsters_album" v-slot:default="{data,loading,error}" where="username=='${tempstr}'" orderby="create_time desc"
@load="handleLoad"
>
<view v-if="loading">加载中...</view>
<view v-if="error">加载错误</view>
</unicloud-db>

操作步骤：

<unicloud-db ref="udb" collection="hamsters_album" v-slot:default="{data,loading,error}" where="username=='${tempstr}'" orderby="create_time desc"
@load="handleLoad"
>
<view v-if="loading">加载中...</view>
<view v-if="error">加载错误</view>
</unicloud-db>

预期结果：

正常where语句

实际结果：

[ WXML 文件编译错误] ./pages/index/photo/photo.wxml
Bad attr where with message

1 | <view><block wx:if="{{isUpdate}}"><drag-button vue-id="2f197fb7-1" isDock="{{true}}" margTop="{{100}}" existTabBar="{{true}}" imgSrc="{{dragSrc}}" data-event-opts="{{[['^btnClick',[['e0']]]]}}" bind:btnClick="e" bind:l="l"></drag-button></block><u-action-sheet vue-id="2f197fb7-2" list="{{listSheet}}" value="{{UmodalShow}}" data-event-opts="{{[['^click',[['clickSheet']]],['^input',[['set_model',['','UmodalShow','$event',[]]]]]]}}" bind:click="e" bind:input="e" bind:l="l"></u-action-sheet><view><view><view class="u-padding-top-20"><cus-pets-avatar vue-id="2f197fb7-3" hamsterData="{{hamsterData}}" bind:l="l"></cus-pets-avatar></view></view></view><view><tool-uploader-img class="vue-ref" vue-id="2f197fb7-4" buttonStyle="{{uploaderButtonStyle}}" data-ref="refUploader" data-event-opts="{{[['^uploadPath',[['uploadPath']]]]}}" bind:uploadPath="e" bind:l="l"></tool-uploader-img><unicloud-db generic:scoped-slots-default="photo-unicloud-db-default" data-vue-generic="scoped" class="vue-ref" vue-id="2f197fb7-5" collection="hamsters_album" where="{{'username==\''+tempstr+'\''}}" orderby="create_time desc" data-ref="udb" data-event-opts="{{[['^load',[['handleLoad']]]]}}" bind:load="e" bind:l="l" vue-slots="{{['default']}}"></unicloud-db></view></view>
| ^
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