Ok I think I got it:
trait CustomMappedField[F, T <: Mapper[T]] extends MappedField[F, T] {
override def fieldId = uniqueFieldId.toOption.map(Text(_))
}
object description extends MappedString(this, 100) with
CustomMappedField[String, Expense]
It works but I still don't like the fact that I need to write
CustomMappedField[String, Expense] while it's already known that the
description object inherits from MappedField[String, Expense].
There should be something more elegant.
On Mon, Nov 23, 2009 at 1:11 AM, Oscar Picasso <oscarpica...@gmail.com>wrote:
> Hi,
>
> The out of the box form generated by a Mapper looks like that:
>
> <form action="/expense/edit" method="post">
>> <table>
>> ...
>> <tr>
>> <td>description</td>
>> <td><input name="F3167038127803C0" type="text" maxlength="100"
>> value="" /></td>
>> </tr>
>> ...
>> <tr>
>> <td> </td>
>> <td><input value="Create" type="submit" /></td>
>> </tr>
>> </table>
>> </form>
>>
>
> I would like however something like that:
>
> <form action="/expense/edit" method="post">
>> <table>
>> ...
>> <tr>
>> <td><label for="expense_description">Expense
>> Description</label></td> <!-- The localized label -->
>> <td><input id="expense_description" name="F3167038127803C0"
>> type="text" maxlength="100" value="" /></td>
>> </tr>
>> ...
>> <tr>
>> <td> </td>
>> <td><input value="Create" type="submit" /></td>
>> </tr>
>> </table>
>> </form>
>>
>
> As an exercise I just tried to add the id attribute to the field element:
>
>> object description extends MappedString(this, 100) {
>> override def fieldId = uniqueFieldId.toOption.map(Text(_))
>> }
>>
>
> However I want to do this kind of customization to all the fields without
> overriding the fieldId method in each of them.
> I thought about writing a mixin trait with the fieldId method and having
> all my fields extends this mixin.
>
> Is this the right approach? If so does this mixin trait needs to extends
> MappedField and what should be its signature?
> These are some basic questions, but I have not programmed in scala since
> quite a long time so I am a little confused about the right approach.
>
> Or maybe there is a better idea than using a mixin?
>
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