How do I pass args into custom method I've written in Play 2?

Question

I wrote a method in my Play Framework 2 scala template to generate date/time inputs. I can't figure out how to pass html args like _label into it though.

@dateField(field: Field, timeName: String)(implicit handler: FieldConstructor, lang: play.api.i18n.Lang) = {
    @input(field, '_showConstraints -> false) { (id, name, value, args) =>
        <input type="text" value="@value" name="@name" @toHtmlArgs(args)>
        <input type="text" value='@eventForm(timeName).value()' name="@timeName" />
    }
}

I would like to be able to call this to generate a field with no label:

@dateField(eventForm("event.endDate"), "event.endTime", '_label -> "")

What do I need to do for this to work?

score 3 · Accepted Answer · edited May 23 '17 at 10:34

3

You have to define a vargs field. In Scala, this is denoted by an asterisk. See this answer for more details.

Your code would then look like this:

@dateField(field: Field, timeName: String, more: (Symbol, Any)*)(implicit handler: FieldConstructor, lang:  play.api.i18n.Lang) = {
  @input(field, ('_showConstraints -> false :: more.toList) : _*) { (id, name, value, args) =>
    <input type="text" value="" name="@name" @toHtmlArgs(args)>
  }
}

edited May 23 '17 at 10:34

Community

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answered Jan 21 '13 at 22:40

Marius Soutier

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This gives me an error at `:: more...` Here is the message: `type mismatch; found : List[(Symbol, Any)] required: (Symbol, Any) Note: implicit method implicitFieldConstructor is not applicable here because it comes after the application point and it lacks an explicit result type'` – TomahawkPhant Jan 21 '13 at 22:46
Really? For me this works. Did you copy-paste it? Your error suggests that the last part (`: _*`) is missing. – Marius Soutier Jan 21 '13 at 22:50

How do I pass args into custom method I've written in Play 2?

1 Answers1