How to declare and access local variables in scala template in play framework?

Question

I have code in scala template like:

@for(col <- List.range(0,12)) {
    <td>
        @if(col % 2 == 0) {
            @{ val letter = someMap(col) }
            <div class="z@(letter)@(letter)s"></div>
        }
    </td>
}

But I get compile error: value letter not found. How can I declare variables and be able to access later in the markup like above?

Possible duplicate of Declare variable in a Play2 scala template — pathikrit
– pathikrit, Commented Jan 8, 2016 at 17:46

Daniel Hinojosa · Accepted Answer · 2011-07-03 20:28:42Z

7

Actually I have never seen @if nor have I tried PlayFramework. But if is what I think it is, it seems that when you actually try to ask for letter it's already out of scope. What happens if you re-arrange the brackets as follows?

@for(col <- List.range(0,12)) {
  <td>
    @if(col % 2 == 0) {
      @{val letter = someMap(col)
        <div class="z@(letter)@(letter)s"></div>
      }
    }
  </td>
}

answered Jul 3, 2011 at 20:28

Daniel Hinojosa

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tmsss · Accepted Answer · 2021-10-14 16:02:52Z

0

The only way I got this working on Play Framework 2.8.x was with Scala's Range function:

@import scala.collection.immutable.Range

@for(col <- Range(0,12)) {
  <td>
    @if(col % 2 == 0) {
      @{val letter = someMap(col)
        <div class="z@(letter)@(letter)s"></div>
      }
    }
  </td>
}

answered Oct 14, 2021 at 16:02

tmsss

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