我之前曾问过这个问题无济于事,但是我尝试实施新策略。我有一个mongodb集合pieces
,我正在从中收集信息。在集合中,我还需要访问一个数组parts
。
我有一个嵌套的{{#each in ...}}
循环以显示所有项目,但是问题是希望根据外部循环来折叠内部循环。这是我的代码:
<template name="band">
<div class="container" style="padding-top: 25px">
<div class="table-responsive">
<table class="table table-borderless table-light table-sm">
<thead class="thead-light">
<tr>
<th>Title:</th>
<th>See the Music:</th>
<th>Hear the Music:</th>
<th>Instrumentation:</th>
<th>Price (per copy):</th>
<th>Quantity:</th>
</tr>
</thead>
<tbody>
{{#each piece in pieces}}
<tr id ="{{piece.name}}" class="itemList table-warning">
<th class="name tText">{{piece.name}}</th>
<td class="pdf tText" style="text-align: center"><a class ="pdf" href="{{piece.pdf}}" target="_blank"><i class="fa fa-file-text-o" aria-hidden="true"></i></a></td>
<td class="audio tText" style="text-align: center"><a class="audio" href="{{piece.audio}}" target="_blank"><i class="fa fa-volume-up" aria-hidden="true"></i></a></td>
<td class="format tText">{{piece.instrumentation}}</td>
<th class="price tText" >${{piece.price}}</th>
<td><input class ="qty" type ="number" name ="quantity" value="0" min="0"></td>
</tr>
<tr class="partsList">
<td colspan ="3">
<select class="form-control">
<option autofocus value ="hide">Hide {{piece.name}} Parts</option>
<option value ="show">Show {{piece.name}} Parts</option>
</select>
</td>
</tr>
{{#if showParts}}
{{#each part in piece.parts}}
{{>partList piece=piece part=part}}
{{/each}}
{{/if}}
{{/each}}
</tbody>
<tfoot>
<tr>
<td colspan ="5"></td>
<td><button class = "button addItems">Add to Cart</button></td>
</tr>
</tfoot>
</table>
</div>
</div>
<template name="partList">
<tr class="{{piece.name}}">
<td colspan="3"></td>
<td class="pname tText">{{piece.name}}: {{part.pname}}</td>
<td class="price tText">${{part.pprice}}</td>
<td><input class="qty" type="number" name="quantity" value="0" min="0"></td>
</tr>
还有我的js
Template.band.events({'change select': function(event, template){
if($(event.target).val()=="show"){
template.showParts.set(true)
}else{
template.showParts.set(false);
}
})}
Template.band.onCreated( function(){
Meteor.subscribe('bandList');
this.showParts = new ReactiveVar(false);});
Template.band.helpers({
pieces: function(){
return bandmusic.find({},{sort:{name:1}}).fetch()
},
showParts: function(){
return Template.instance().showParts.get()
}});
一切正常,但是在选择<template name="partList">
选项时,每个<select>
都会切换。
是否有一种方法可以向空格键添加条件以仅基于外部_id
循环中的{{#each}}
进行切换?鉴于我所使用的逻辑,还是类似的东西。
答案 0 :(得分:0)
您可以将id设置为react-var,并使其处于if
条件下,以获得所需的结果。
HTML
{{#each piece in pieces}}
....
<tr class="partsList">
<td colspan ="3">
<select data-id={{_id}} class="form-control">
<option autofocus value ="hide">Hide {{piece.name}} Parts</option>
<option value ="show">Show {{piece.name}} Parts</option>
</select>
</td>
</tr>
{{#if showParts _id}}
{{#each part in piece.parts}}
{{>partList piece=piece part=part}}
{{/each}}
{{/if}}
....
{{/each}}
JS
Template.band.helpers({
showParts(_id) {
const selectedId = Template.instance().showParts.get();
return selectedId && _id == selectedId;
}
}
Template.band.events({
'change select'(event, template) {
if (event.currentTarget.value == "show") {
const _id = event.currentTarget.dataset.id;
template.showParts.set(_id);
} else {
template.showParts.set(null);
}
}
});