[Lift] Re: Mapper record deletion

[Magnus Alvestad]

> As I move deeper into learning Lift, I now want to start deleting
> Mapper records in the ToDo example.

Here's how I did it (based on suggestions in this group, I think):

bind ( "question", html,
  "text" -> ..,
  "delete" -> ajaxButton(Text("Remove"),
  Call("dialog", Str("Do you want to delete the question?")),
  () => {q.delete_!; S.notice( "Deleted the question!"); reDraw
()})
)

.. and then in the template (default.html) ..



function dialog(text, theCall) {
  if (confirm(text)) theCall();
}



-Magnus

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[Lift] More compact validation

[Magnus Alvestad]

Hi. In my lift application using Mapper, I'm doing this all the time:

object name extends MappedPoliteString(this, 16) {
  override def validations = Validate.notEmpty(this) _ ::
super.validations
}

where Validate is defined:

object Validate  {
  val valid = List[FieldError]()
  def notEmpty(fi: FieldIdentifier)(field: String) = {
if (field.length == 0)
  List(FieldError(fi, Text("Field cannot be empty")))
else
  valid
}

This code works, but is a bit verbose, especially when there are 10 or
more strings in a class. I guess I could define a new class
MappedPoliteNonEmptyString, but are there other (better) alternatives?

-Magnus

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[Lift] Re: Alternating row colors

[Magnus Alvestad]

To elaborate, I added a $(document).ready function to handle this.

However!

Some other pages have ajax functionality. When they update html in the
page, this html (and the page) will not be 'reprocessed' by JQuery.
Can I handle this in a generic manner?

-Magnus

On May 11, 5:09 pm, Magnus Alvestad  wrote:
> Ah! Based on Viktors suggestions and some more info at:
>
> http://15daysofjquery.com/examples/zebra/
>
> I was able to write this in a couple of lines of JQuery!
>
> -Magnus

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[Lift] Re: Alternating row colors

[Magnus Alvestad]

Ah! Based on Viktors suggestions and some more info at:

http://15daysofjquery.com/examples/zebra/

I was able to write this in a couple of lines of JQuery!

-Magnus

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[Lift] Re: Alternating row colors

[Magnus Alvestad]

Thank you for your answers. I'll try to include some more detail
because I was not able to apply your suggestions to my code.

My template has a section like this:


  

  

  


while my snippet looks more or less like this:

class T {

  val questions = "One" :: "Two" :: "Three" :: Nil

  private def doList()(html:NodeSeq): NodeSeq = {
questions.flatMap(q => bind ("question", html,
  "text" -> Text(q))
  }

  def list(html:NodeSeq) = {
bind("question", html, "list" -> doList() )
  }
}

-Magnus

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[Lift] Alternating row colors

[Magnus Alvestad]

I'm still learning lift (and scala). For my sample application I want
to display a table with alternating row colors. I want to put the
style in my CSS file and add a classname to every TR in my table to
indicate odd and even rows. However, I don't know how to take a value
from the snippet binding and assigning it to an attribute in my
template file. Can anyone point me in the right direction?

-Magnus

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