How index starts with 1 in revel Framework

Question

  <tr>
      <td>rank</td>
      <td>abc</td>
  </tr>
  {{ range $index,$abc := .abc }}
     <tr>
      <td>{{$index}}</td> // 0
      <td>{{$abc}}</td>
     </tr>
  {{end}}

how to {{$index}} starts with 1

{{add $index 1}} - unction "add" not defined

{{$index + 1}} - illegal number syntax: "+"

Have you try passing your own `add` function to the template data? — Koala Yeung, Oct 16 '19 at 04:34
You can assign a variable "add" to your controller's [ViewArgs](https://godoc.org/github.com/revel/revel#Controller.ViewArgs) that returns a +1 value of the input number. — Koala Yeung, Oct 16 '19 at 04:39

score 0 · Accepted Answer · answered Oct 16 '19 at 05:03

You can pass a custom function into your controller's ViewArgs as a variable.

controller.ViewArgs["addOne"] = func (i int64) {
    return i+1
}

You can then use $.addOne to access the function in a loop. To use it as a function, you have to add a call keyword before it:

  <tr>
      <td>rank</td>
      <td>abc</td>
  </tr>
  {{ range $index, $abc := .abc }}
     <tr>
      <td>{{call $.addOne $index}}</td> // $index + 1
      <td>{{$abc}}</td>
     </tr>
  {{end}}

How index starts with 1 in revel Framework

1 Answers1