我正在 Meteor 中构建一个简单的订购应用程序,并且尝试获取订单总数,尽管我可以让它以真实数字的形式登录控制台 - 它被渲染为 NaN。任何帮助将不胜感激。
请注意,各个产品的总计显示良好。
我有以下文件:
meteorder/client/templates/orders/order_build.js:
Template.order.helpers({
'orderitems': function() {
var orderCart = [];
var orderItems = OrderItems.find({});
var total = 0;
orderItems.forEach(function(orderItem) {
var item = _.extend(orderItem, {});
var product = Products.findOne({
_id: orderItem.product
});
orderItem.productname = product.description;
orderItem.price = (Number(product.price) * orderItem.qty);
total += orderItem.price;
orderCart.push(orderItem);
});
orderCart.subtotal = total;
orderCart.tax = orderCart.subtotal * .23;
orderCart.total = orderCart.subtotal + orderCart.tax;
return orderCart;
}
})
meteorder/client/templates/orders/order_build.html:
<template name="order">
<div class="page-header">
<h1>
<small>My Order</small>
</h1>
</div>
<table class="span4 table table-striped table-bordered table-hover">
<thead>
<th>Qty</th>
<th>Product</th>
<th>Price</th>
<th></th>
</thead>
<tbody>
{{#each orderitems}}
<tr>
<td>{{qty}}</td>
<td>{{productname}}</td>
<td>{{currency price}}</td>
<td><span class="label-important label removeci">X</span></td>
</tr>
{{else}}
<tr>
<td colspan="3">No Products in Order</td>
</tr>
{{/each}}
<tr>
<td class="totalcol" colspan="2">SubTotal:</td>
<td colspan="2">{{currency orderCart.subtotal}}</td>
</tr>
<tr>
<td class="totalcol" colspan="2">Tax 6%:</td>
<td colspan="2">{{currency orderCart.tax}}</td>
</tr>
<tr>
<td class="totalcol" colspan="2">Total:</td>
<td colspan="2">{{currency orderCart.total}}</td>
</tr>
</tbody>
</table>
</template>
meteorder/client/lib/main.js:
Template.registerHelper('currency', function(num){
return '€' + Number(num).toFixed(2);
});
meteorder/server/server.js:
Meteor.methods({
addToOrder:function(qty,product,session){
check(qty, Number);
check(product, String);
check(session, String);
if(qty > 0){
OrderItems.insert({qty:qty,product:product,sessid:session});
console.log('reaching this fn', typeof qty, typeof product, typeof session);
} else{
console.log('Quantity is Zero');
}
},
removeOrderItem:function(id){
check(id, String);
OrderItems.remove({_id:id});
console.log('successfully deleted');
}
});
这里是 GitHub repo 的链接
以及最新版本的deployed App
提前致谢!
编辑:
只需为 Matthias 添加以下内容:
Template.productItem.events({
'click .addOrder':function(evt,tmpl){
var qty1 = tmpl.find('.prodqty').value;
var qty = parseInt(qty1);
var product = this._id;
var sessid = Meteor.default_connection._lastSessionId; //stops others adding to your cart etc
Meteor.call('addToOrder',qty, product, sessid);
console.log('this is the quantity:', typeof qty, product, sessid);//stops others ad
}
});
看看它是否可以更好地了解购物车未填充的原因。谢谢
最佳答案
您尝试将 orderCart
用作对象数组和对象。您将一堆 orderItem
对象插入数组,但最后您尝试设置 orderCart.subtotal
等...
更改您的助手以拥有单独的摘要对象:
var summary = {};
summary.subtotal = total;
summary.tax = summary.subtotal * .23;
summary.total = summary.subtotal + summary.tax;
return {items: orderCart, summary: summary}
然后在你的 html 中执行:
{{#each orderitems.items}}
...
{{/each}}
最后在您的摘要行中使用 {{currency orderitems.summary.tax}}
等...
关于javascript - Meteor 在浏览器中返回 NaN,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33129221/