HandlebarsJS：显示JSON数组中对象数的总和？

Question

我有以下简单的handlebarsjs电子邮件HTML模板：

<script id="emailTemplate" type="text/x-handlebars-template">
    <div>
       Hi {{name }} , you have submitted {{ SUM_OF_ARRAY_OBJECTS}} cars. Thanks.
    </div>
</script>

具有json内容：

{
  "name": "john",
  "cars": [
    {
      "registration": "stubReg1",
      "year": "1995"
    },
    {
      "registration": "stubReg2",
      "year": "2000"
    },
    {
      "registration": "stubReg3",
      "year": "2010"
    },
    {
      "registration": "stubReg4",
      "year": "2016"
    }
  ]
}

如何使用把手在SUM_OF_ARRAY_OBJECTS占位符中显示数组对象的总数？即在此示例中为4。

Answer 1

我能够找到答案，这比我想象的要简单：

{{cars.length}}将显示数组中对象总数。