[Lift] Re: date management

2009-06-25 Thread g-man

OK, things are working well with RequestVar, but now I need to know
how to kill it!

After I create and save my record, if I refresh the browser, I get
another record created. I did a temporary hack-fix with:

if(! myRecord.saved_?)

but I would just like to kill the RequestVar after the first round of
record creation-saving.

In terms of your example above, how would I do that?



On Jun 8, 7:18 am, Derek Chen-Becker dchenbec...@gmail.com wrote:
 Generally you can either use RequestVars or a StatefulSnippet class to keep
 the values around on form resubmission. If you're using a Mapper class, you
 really just need one RequestVar to hold your Mapper instance. For example,
 if I had a Mapper class for a person with first name, last name and email, I
 could do something like this in my snippet class:

 ...
   // Set the up the RequstVar to initialize a new MyUserClass by default
   object userVar extends RequestVar[MyUserClass](MyUserClass.create)

   def editMyUser (xhtml : NodeSeq) : NodeSeq = {
     // We define a val to capture the current value of the userVar. This
 will be used to reinject later, as well
     // as for current access
     val current = userVar.is
     ...
     def saveMyUser () {
       current.validate match { ...
         ...
         current.save
       }
     }

     bind(user, xhtml,
            // First we re-inject the current MyUserClass instance using a
 hidden field
            current - SHtml.hidden(() = userVar(current))
            // normal fields follow, e.g.
            name - SHtml.text(current.name.is, current.name(_))
            // alternatively, you could do both steps in the first form
 field:
            name - SHtml.text(current.name.is, { in = userVar(current);
 current.name(in) })
            ...
     )
   }
 ...

 Let me know if you have any questions on that.

 Derek

 On Fri, Jun 5, 2009 at 9:47 PM, g-man gregor...@gmail.com wrote:

  I now have the due date arriving OK from the jQuery datepicker, and I
  cobbled together some ugliness to give days left until the ToDo due
  date, so that is good.

  My problem now is since we are not using the 'magic' of the _toForm
  methods for the form elements, I have to set each var value for the
  model field from the input SHtml data, as was done in the PocketChange
  app AddEntry.scala file.

  What is happening is that the initialization for each var is resetting
  the form if validation fails, so I guess I need to institute some
  RequestVars to remember the form values for resubmission, right?

  All my questions will take take the form of 'how to' recipes of
  foundational webapp elements, as you can see. My plan is to develop
  them for a 'cookbook' section of the wiki, so that's why I am asking
  one simple conceptual thing at a time.

  Therefore, what I have to learn now is all about form binding and
  recalling form value state if validation fails, so please break that
  down for me.

  Thanks as always!

  On Jun 3, 10:25 pm, Derek Chen-Becker dchenbec...@gmail.com wrote:
   Box is the base class. What you want is Full(2).

   Derek

   On Wed, Jun 3, 2009 at 8:53 PM, g-man gregor...@gmail.com wrote:

Very good!

I did a little homework, rearranged some things, and am getting some
nice results with the 'manual method'...

Since I am following the PocketChange app now rather than the ToDo
example, there is no 'todo' val in scope to bind, so the
todo.priority.toForm method will not work.

I have SHtml.select working with a mapping for my choices, and I can
use Empty for my default, but how do I get a Box[2] as my default?

On Jun 3, 7:21 am, Derek Chen-Becker dchenbec...@gmail.com wrote:
 The only issue I would mention is that there's currently an open
  ticket
 because MappedDateTime won't save the time portion when you use
  Derby. I
 haven't had time to triage this yet.

 Derek

 On Wed, Jun 3, 2009 at 3:01 AM, Timothy Perrett
  timo...@getintheloop.eu
wrote:

  Greg,

  I dont really use toForm; have you explored doing it manually? It
  seems like that would be able to tell you if there is a problem
  with
  toForm on MappedDateTime.

  I use mapped date time quite a bit and have no problems at all
  persisting the dates :-)

  Cheers, Tim

  On Jun 3, 3:09 am, g-man gregor...@gmail.com wrote:
   Are there no ideas for my problem?

   I have many more questions saved up, but would like to clear each
  out
   before starting a new one.

   Thanks again!

   On May 31, 1:57 pm, g-man gregor...@gmail.com wrote:

As I proceed to enhance the ToDo example, I have added a new
  field
to
the ToDo.scala model:

object dueOn extends MappedDateTime(this) {
    final val dateFormat = DateFormat.getDateInstance
(DateFormat.SHORT)
    override def asHtml = Text(dateFormat.format(is))}

Next, I added a binding in the TD.scala snippet within the add

[Lift] lift presentation

2009-06-25 Thread Wilson MacGyver

Hi,

I'm doing a presentation on lift to my local java user group next month.

I'm wondering if any of you have slides on lift that I can borrow/leverage? :)

Thanks,
Mac

-- 
Omnem crede diem tibi diluxisse supremum.

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[Lift] Re: lift presentation

2009-06-25 Thread marius d.

I'm giving today a presentation for Transylvania JUG  ... I'll email
you my material.

Br's,
Marius

On Jun 25, 8:04 am, Wilson MacGyver wmacgy...@gmail.com wrote:
 Hi,

 I'm doing a presentation on lift to my local java user group next month.

 I'm wondering if any of you have slides on lift that I can borrow/leverage? :)

 Thanks,
 Mac

 --
 Omnem crede diem tibi diluxisse supremum.
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[Lift] Re: higher-kinded types

2009-06-25 Thread Meredith Gregory
All,

The following code works without going through the M-P-O construction. It
enjoys approximately the same brevity as a Haskell type class.

// smallest expression of monad i can find
trait MBrace[C[_] : MBrace[C,A],A] {
  def nest( a : A ) : C[A]
  def flatten[T : C[C[A]]]( bsq : T ) : C[A]
}

// one of the simplest witnesses of monad i can find
class MBraceSeq[A]( a_ : A* ) extends Seq[A] with MBrace[MBraceSeq,A] {
  override def nest( a : A ) = new MBraceSeq[A]( a )
  override def flatten[T : MBraceSeq[MBraceSeq[A]]]( bsq : T ) :
MBraceSeq[A] = {
(new MBraceSeq[A]( ) /: bsq)( {
  ( acc : MBraceSeq[A], e : MBraceSeq[A] ) = ( acc ++ e
).asInstanceOf[MBraceSeq[A]]
} )
  }
  override def length = a_.length
  override def elements = a_.elements
  override def apply( n : Int ) = a_.apply( n )
}

Best wishes,

--greg

On Wed, Jun 24, 2009 at 3:49 PM, Meredith Gregory
lgreg.mered...@gmail.comwrote:

 All,

 Am i correct in concluding that the solution in The Moors-Piessens-Odersky
 paper only works with collections that have been clever enough to have used
 type members rather that type parameters? Or, is there a trick to making the
 vast majority of the collections types that are parametrically typed look as
 if they have type members? (See example below.)

 Best wishes,

 --greg

 // Paraphrasing the basic Moors-Piessens-Odersky construction
 trait TypeCtor1 { type E }
 trait Brace[A] extends TypeCtor1 {
   type C : TypeCtor1
   def nest( a : A ) : C{type E = A}
   def flatten( bsq : C{type E=C{type E=A}} ) : C{type E=A}
 }

 // Now, how to make a version of BraceList since List is parametrically
 typed?


 --
 L.G. Meredith
 Managing Partner
 Biosimilarity LLC
 1219 NW 83rd St
 Seattle, WA 98117

 +1 206.650.3740

 http://biosimilarity.blogspot.com




-- 
L.G. Meredith
Managing Partner
Biosimilarity LLC
1219 NW 83rd St
Seattle, WA 98117

+1 206.650.3740

http://biosimilarity.blogspot.com

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[Lift] Re: lift presentation

2009-06-25 Thread Timothy Perrett

You can find all of DPP's preso's here: http://is.gd/1cUi0

Cheers, Tim
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[Lift] Re: Can't embed a snippet

2009-06-25 Thread Marc Boschma

Wouldn't this work with the Scala XML parser?

xml:group
h2Welcome/h2
pPut welcome details here./p
/xml:group
On 25/06/2009, at 1:08 AM, Nolan Darilek wrote:


 On 06/24/2009 09:40 AM, Derek Chen-Becker wrote:
 Wait a second. I have plenty of templates that have multiple elements
 in them. What exactly is the problem you're seeing here?

 Using 1.1, I have the following in templates-hidden/welcome.html:

 h2Welcome/h2

 pPut welcome details here./p

 Running mvn test gives me the following failure report:

 ---
 Test set: info.thewordnerd.therascribe.AppTest
 ---
 Tests run: 2, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 1.8  
 sec
  FAILURE!
 testXml(info.thewordnerd.therascribe.AppTest)  Time elapsed: 1.474 sec
  FAILURE!
 junit.framework.AssertionFailedError: Malformed XML in 1 file:
 src/main/webapp/templates-hidden/welcome.html
 at junit.framework.Assert.fail(Assert.java:47)
 at info.thewordnerd.therascribe.AppTest.testXml(AppTest.scala:72)
 ..

 From the surefire report:

 system-outMalformed XML in 1 file:
 src/main/webapp/templates-hidden/welcome.html
 /system-out
 system-err:3:70: document must contain exactly one element
  ^
 /system-err

 Surrounding it in a div fixes that. Must be a new addition in 1.1?


 


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[Lift] Re: Getting Username and Password from URL of form hxxp://user:passw...@foo.org

2009-06-25 Thread Timothy Perrett

Are you using the builtin support for basic authentication in lift? If
not, please see my example here: http://is.gd/1cYhR

The format you mention is standard HTTP Basic, and in accordance with
the RFC's - it should be Base64 encoded. Lift supports both HTTP basic
and HTTP digest.

Cheers, Tim

On Jun 25, 5:10 am, Alan M alan.morten...@gmail.com wrote:
 I can't seem to find anyway to get to those two values.  I've been
 searching all over the request class/object and no luck.

 I'm writing a RESTful web service that uses basic auth and for some
 reason jQuery likes to send things in the above mentioned format
 (http://user:passw...@foo.org).  I've tried to fix that on the
 Javascript side but I couldn't get anything to work.  So instead I
 decided on the service to recognize either the header style or the URL
 style of passing the login info.  Sounded simple enough, until I
 couldn't find how to get at that/those strings..

 Any help would be greatly appreciated..

 Alan Mortensen
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[Lift] Re: lift presentation

2009-06-25 Thread fan...@gmail.com

Wilson MacGyver a écrit :
 Hi,
 
 I'm doing a presentation on lift to my local java user group next month.
 
 I'm wondering if any of you have slides on lift that I can borrow/leverage? :)

I did a presentation some weeks ago, the slides are under a creative 
common licence, so use them if you want !

http://fanf42.blogspot.com/2009/06/tour-of-scala-ossgtp-paris-oss-user.html



-- 
Francois Armand
http://fanf42.blogspot.com

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[Lift] Re: lift presentation

2009-06-25 Thread Francois Armand


 I did a presentation some weeks ago, the slides are under a creative common
 licence, so use them if you want !

 http://fanf42.blogspot.com/2009/06/tour-of-scala-ossgtp-paris-oss-user.html


OK, just ignore this message, it was a *Scala* presentation, not a
*Lift* one - sorry, I read your post too quickly - and no, the fact
that we were in Lift ml didn't make me find that strange :)


-- 
--
Francois Armand
http://fanf42.blogspot.com/

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[Lift] Re: Anyone working on the flot widget?

2009-06-25 Thread Jeppe Nejsum Madsen

On 25 Jun 2009, Francois Bertrand wrote:


 Hi Jeppe
 
 Great to see you are interested in the flot widget.
 
 My current to-do list for the flot widget, is:
 
 - create more Lift JsExp and JsCmd to modify a already displayed flot
 graph.  They should be used in AJAX and Comet applications
 
 - update to a more recent version of the javascrrit widget

I need this as well, especially since there are some patches that
provides pie charts

 
 - create the test demo app,
 
 - make the creation of FlotOptions, FlotLinesOptions, etc, less
 verbose.  I hope that Scala 2.8 Named and Default Arguments will help.

Yeah, this would be nice :-) We probably need some working code within
the next few weeks so probably can't wait for 2.8 though.

 - create a high level mechanism to display Lift's Record
 
 I appreciate any help.

What's the best way to coordinate this? Just fork the code on github or?

/Jeppe


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[Lift] Re: lift presentation

2009-06-25 Thread Wilson MacGyver
Thank you very much!

On Thu, Jun 25, 2009 at 2:16 AM, marius d. marius.dan...@gmail.com wrote:


 I'm giving today a presentation for Transylvania JUG  ... I'll email
 you my material.

 Br's,
 Marius

 On Jun 25, 8:04 am, Wilson MacGyver wmacgy...@gmail.com wrote:
  Hi,
 
  I'm doing a presentation on lift to my local java user group next month.
 
  I'm wondering if any of you have slides on lift that I can
 borrow/leverage? :)
 
  Thanks,
  Mac
 
  --
  Omnem crede diem tibi diluxisse supremum.
 



-- 
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[Lift] Re: lift presentation

2009-06-25 Thread Wilson MacGyver

heheh, no problem. I did the one on Scala back in Feb. :)

On Thu, Jun 25, 2009 at 7:31 AM, Francois Armandfan...@gmail.com wrote:


 I did a presentation some weeks ago, the slides are under a creative common
 licence, so use them if you want !

 http://fanf42.blogspot.com/2009/06/tour-of-scala-ossgtp-paris-oss-user.html


 OK, just ignore this message, it was a *Scala* presentation, not a
 *Lift* one - sorry, I read your post too quickly - and no, the fact
 that we were in Lift ml didn't make me find that strange :)


 --
 --
 Francois Armand
 http://fanf42.blogspot.com/

 




-- 
Omnem crede diem tibi diluxisse supremum.

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[Lift] Re: New mapper class: MappedEnumString

2009-06-25 Thread Jeppe Nejsum Madsen

On Thu, Jun 25, 2009 at 1:12 AM, Oliver Lambert olambo...@gmail.com wrote:

 Looks very nice.

 One thing I'm wondering, what if I wanted the displayed value outside of the 
 mapper, such as TestTypes.Item1.displayValue. Would you use an implicit 
 conversion to provide this or is the
 display value conceptually always part of a mapper object.

Good question :-) I'm still using CRUDify generated views while
prototyping, but will probably need some more sophisticated layouts at
some point. Don't yet know if the display value will come from the
mapper object or the underlying enum.

 I have a rough implementation called EnumWithDescription, that wraps (not 
 extends) an Enumeration
 and provides a description method on the enumeration value without using an 
 implicit. I'm wondering
 if it might be useful to combine your approach and mine?

Sure. It might also be possible to make the original MappedEnum a bit
more flexible instead (as Derek suggested earlier). My class is
basically just a copy with very few modifications to handle the db
value. I just haven't got the Scala knowledge yet to easily see how
the interface should be and I needed to nail the db schema :-)

/Jeppe

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[Lift] Re: lift presentation

2009-06-25 Thread Jeremy Day
Guys,

I just want to say that I haven't started using Lift yet but I already love
it.  This community is very supportive and responsive.  Keep up the awesome
work!

Jeremy

On Thu, Jun 25, 2009 at 7:21 AM, Wilson MacGyver wmacgy...@gmail.comwrote:


 heheh, no problem. I did the one on Scala back in Feb. :)

 On Thu, Jun 25, 2009 at 7:31 AM, Francois Armandfan...@gmail.com wrote:
 
 
  I did a presentation some weeks ago, the slides are under a creative
 common
  licence, so use them if you want !
 
 
 http://fanf42.blogspot.com/2009/06/tour-of-scala-ossgtp-paris-oss-user.html
 
 
  OK, just ignore this message, it was a *Scala* presentation, not a
  *Lift* one - sorry, I read your post too quickly - and no, the fact
  that we were in Lift ml didn't make me find that strange :)
 
 
  --
  --
  Francois Armand
  http://fanf42.blogspot.com/
 
  
 



 --
 Omnem crede diem tibi diluxisse supremum.

 


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[Lift] Re: date management

2009-06-25 Thread TylerWeir

The code Derek included:
// Set the up the RequstVar to initialize a new MyUserClass by default
object userVar extends RequestVar[MyUserClass](MyUserClass.create)

By default creates a MyUserClass instance.
Maybe you want to init the RequestVar as an Empty Box and then
conditionally modify it.

object userVar extends RequestVar[Box[MyUserClass]](Empty)

Then after you save, you can set the RequestVar to Empty again.

Without looking at your code, this is a guess, I could be/probably am
wrong.



On Jun 25, 12:10 am, g-man gregor...@gmail.com wrote:
 OK, things are working well with RequestVar, but now I need to know
 how to kill it!

 After I create and save my record, if I refresh the browser, I get
 another record created. I did a temporary hack-fix with:

 if(! myRecord.saved_?)

 but I would just like to kill the RequestVar after the first round of
 record creation-saving.

 In terms of your example above, how would I do that?

 On Jun 8, 7:18 am, Derek Chen-Becker dchenbec...@gmail.com wrote:

  Generally you can either use RequestVars or a StatefulSnippet class to keep
  the values around on form resubmission. If you're using a Mapper class, you
  really just need one RequestVar to hold your Mapper instance. For example,
  if I had a Mapper class for a person with first name, last name and email, I
  could do something like this in my snippet class:

  ...
    // Set the up the RequstVar to initialize a new MyUserClass by default
    object userVar extends RequestVar[MyUserClass](MyUserClass.create)

    def editMyUser (xhtml : NodeSeq) : NodeSeq = {
      // We define a val to capture the current value of the userVar. This
  will be used to reinject later, as well
      // as for current access
      val current = userVar.is
      ...
      def saveMyUser () {
        current.validate match { ...
          ...
          current.save
        }
      }

      bind(user, xhtml,
             // First we re-inject the current MyUserClass instance using a
  hidden field
             current - SHtml.hidden(() = userVar(current))
             // normal fields follow, e.g.
             name - SHtml.text(current.name.is, current.name(_))
             // alternatively, you could do both steps in the first form
  field:
             name - SHtml.text(current.name.is, { in = userVar(current);
  current.name(in) })
             ...
      )
    }
  ...

  Let me know if you have any questions on that.

  Derek

  On Fri, Jun 5, 2009 at 9:47 PM, g-man gregor...@gmail.com wrote:

   I now have the due date arriving OK from the jQuery datepicker, and I
   cobbled together some ugliness to give days left until the ToDo due
   date, so that is good.

   My problem now is since we are not using the 'magic' of the _toForm
   methods for the form elements, I have to set each var value for the
   model field from the input SHtml data, as was done in the PocketChange
   app AddEntry.scala file.

   What is happening is that the initialization for each var is resetting
   the form if validation fails, so I guess I need to institute some
   RequestVars to remember the form values for resubmission, right?

   All my questions will take take the form of 'how to' recipes of
   foundational webapp elements, as you can see. My plan is to develop
   them for a 'cookbook' section of the wiki, so that's why I am asking
   one simple conceptual thing at a time.

   Therefore, what I have to learn now is all about form binding and
   recalling form value state if validation fails, so please break that
   down for me.

   Thanks as always!

   On Jun 3, 10:25 pm, Derek Chen-Becker dchenbec...@gmail.com wrote:
Box is the base class. What you want is Full(2).

Derek

On Wed, Jun 3, 2009 at 8:53 PM, g-man gregor...@gmail.com wrote:

 Very good!

 I did a little homework, rearranged some things, and am getting some
 nice results with the 'manual method'...

 Since I am following the PocketChange app now rather than the ToDo
 example, there is no 'todo' val in scope to bind, so the
 todo.priority.toForm method will not work.

 I have SHtml.select working with a mapping for my choices, and I can
 use Empty for my default, but how do I get a Box[2] as my default?

 On Jun 3, 7:21 am, Derek Chen-Becker dchenbec...@gmail.com wrote:
  The only issue I would mention is that there's currently an open
   ticket
  because MappedDateTime won't save the time portion when you use
   Derby. I
  haven't had time to triage this yet.

  Derek

  On Wed, Jun 3, 2009 at 3:01 AM, Timothy Perrett
   timo...@getintheloop.eu
 wrote:

   Greg,

   I dont really use toForm; have you explored doing it manually? 
   It
   seems like that would be able to tell you if there is a problem
   with
   toForm on MappedDateTime.

   I use mapped date time quite a bit and have no problems at all
   persisting the dates :-)

   Cheers, Tim

   On Jun 3, 3:09 am, g-man 

[Lift] From JPA question to ScalaQuery to Collection Abstractions

2009-06-25 Thread Meredith Gregory
All,

Again -- many thanks to the posters and responders on this thread. i've
moved on to attempt to use
ScalaQueryhttp://github.com/szeiger/scala-query/tree/masteras the
target for the SQL persistence. Stefan Szeiger describes his work
herehttp://szeiger.de/blog/2008/12/21/a-type-safe-database-query-dsl-for-scala/#more-24
.

It seems to be a week of meeting resistance, however. i've been attempting
to build the simplest possible collection to use as a toy to test my
compilation strategy. This has turned out to be quite a little brain-teaser.

For me simpler means: contains less information. In this sense, a Set is
simpler than a List. The simplest possible collection i can imagine (that
still supports associativity -- and i don't know if i can call something
that doesn't support associativity a collection) is a monad. A monad doesn't
commit to what the collection contains; only parametrically commits to how
to put things into the collection; and only parametrically commits to how to
flatten the collection (which is tantamount to supporting associativity).

After thinking about it for half a day, and revisiting the
Moors-Piessens-Odersky (MPO) paper on higher-kinded types, i realized that
the MPO construction doesn't actually apply to Scala in practice (someone
please tell me if i'm wrong) because they fundamentally rely on
constructions using type *members* and not type *parameters*. Unfortunately,
most of the collections libraries are written using type parameters. So, i
decided to roll my own and see what i got.

Here's what i came up with last night.

// smallest expression of monad i can find
trait MBrace[C[_] : MBrace[C,A],A] {
  def nest( a : A ) : C[A]
  def flatten[T : C[C[A]]]( bsq : T ) : C[A]
}

// one of the simplest witnesses of monad i can find
class MBraceSeq[A]( a_ : A* ) extends Seq[A] with MBrace[MBraceSeq,A] {
  override def nest( a : A ) = new MBraceSeq[A]( a )
  override def flatten[T : MBraceSeq[MBraceSeq[A]]]( bsq : T ) :
MBraceSeq[A] = {
(new MBraceSeq[A]( ) /: bsq)( {
  ( acc : MBraceSeq[A], e : MBraceSeq[A] ) = ( acc ++ e
).asInstanceOf[MBraceSeq[A]]
} )
  }
  override def length = a_.length
  override def elements = a_.elements
  override def apply( n : Int ) = a_.apply( n )
}

i was mostly ok with this -- apart from some desiderata/concerns regarding
the Seq methods being visible at this level. i woke up this am and realized
that this is not even wrong. It requires an instance of MBrace to invoke the
nest or flatten methods.

Geez, i feel like a first year undergrad. All i want to do is write the
simplest possible collection on which i can then test a persistence
strategry and i run into roadblocks everywhere. ;-)

Best wishes,

--greg

On Wed, Jun 24, 2009 at 8:00 AM, Derek Chen-Becker dchenbec...@gmail.comwrote:

 Well, in my real-world experience I've never had very complex models and
 I've never used TABLE-PER-CLASS either, so I don't really have a feel for
 what's not possible. Generally I think that JPA (which is a subset of
 Hibernate) covers a good portion of people's needs for ORM, but it
 definitely has some big missing functionality (e.g. no ordered collections
 until JPA 2). I think that in this case Greg is pushing the limits on a
 relatively unused corner of JPA (I've never seen someone use TABLE-PER-CLASS
 before) and he's hitting some bugs. I want to make clear that I think that
 what Greg is attempting is entirely possible. My earlier comment about
 rolling your own ORM was because I misunderstood what he was doing with
 abstract classes. In my mind, there would be a couple of places where you
 might want to roll your own stuff:


1. An existing schema that doesn't map well to an object graph. We have
a legacy database at work where the brilliant developers decided that
nothing should be normalized and data can exist in one of four tables based
on some arcane business logic. You can still build an ORM layer on 
 something
like this, but essentially all you're doing is creating a thin wrapper on
ResultSets
2. You have very specific data that you need to retrieve with possibly
complex joins, and you need it to be as performant as possible. There are
some tricks you can do with EJB QL to make it prefetch things, but often 
 you
can end up with multiple round trips to the database and/or data that you
don't need being fetched. In certain scenarios I could see this being an
issue.

 This list isn't intended to be exhaustive, these are just the top two that
 come to mind. In terms of Hibernate vs others like JPOX, TopLink, etc, I'd
 say that Hibernate is a first-class provider and at least equal to the
 others.

 Derek


 On Wed, Jun 24, 2009 at 2:21 AM, TSP tim.pig...@optrak.co.uk wrote:


 Derek
 Would you distinguish between what is achievable in a specific ORM
 such as Hibernate from JPA in this statement or would you think it
 applies to all. I've got to go with hibernate in any case because of
 

[Lift] MySQL connection pool

2009-06-25 Thread ph

It's not strictly Lift question...

Is connection pool a feature of MySQL JDBC driver? It is a feature of
MySQL ODBC driver...
Looking into this article
http://dev.mysql.com/tech-resources/articles/connection_pooling_with_connectorj.html
it's not clear to me wheather connection pool is implemented in
application server or in driver itself.
I'm planning on writing own application server and don't know if I
need to worry about implementing connection pooling or not.

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[Lift] Lift website page renders incorrectly in IE

2009-06-25 Thread samreid

This lift page renders incorrectly in IE:
http://liftweb.net/docs/getting_started.html

The text is much too far to the right.  My coworker pointed this out
to me and I reproduced the problem, let me know if you have any
problems identifying or reproducing the problem.

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[Lift] Re: Lift website page renders incorrectly in IE

2009-06-25 Thread Timothy Perrett

This is a known issue - I'll get round to rebuilding the site soon (it was
originally thrown up in a matter of hours so it not the smoothest) so we can
eliminate these kinds of bugs.

Thanks

Tim 


On 25/06/2009 17:43, samreid samrr...@gmail.com wrote:

 
 This lift page renders incorrectly in IE:
 http://liftweb.net/docs/getting_started.html
 
 The text is much too far to the right.  My coworker pointed this out
 to me and I reproduced the problem, let me know if you have any
 problems identifying or reproducing the problem.
 
  
 



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[Lift] Re: JPA and auto generation of id

2009-06-25 Thread Derek Chen-Becker
I've used JPA with MySQL in the past and I don't recall having to specify a
generator to get auto-incremenet IDs working. Does the schema for this
particular entity have AUTO_INCREMENT set for the id column?

Derek

On Wed, Jun 24, 2009 at 5:29 PM, David Persons dhwpers...@gmail.com wrote:


 Thanks for all the answers guys.

 I managed to fix the id problem, I needed the Hibernate specific class
 GenericGenerator to fix it, which of cource is less pretty then using
 only JPA. Someone has an example of how to make it work with MySql and
 only JPA annotations? Current version:

 @Entity
 class Scene {
  @Id
  @GenericGenerator{val name=hibernate-increment, val
 strategy=increment}
  @GeneratedValue{val strategy = GenerationType.SEQUENCE, val
 generator = hibernate-increment}
   var id : Long = _

  @Column{val unique = true, val nullable = false}
  var ordering : Int = _

  @Column{val unique = true, val nullable = false}
  var name : String = 

  @ManyToOne{val optional = false}
  var storyBoard : StoryBoard = _
 }

 However, now I get an org.hibernate.PropertyValueException: not-null
 property references a null or transient value:
 model.Scene.storyBoard :-s I tried a lot of things already, the
 corresponding StoryBoard is saved and not null, so I guess it has to
 be transient. Merging the StoryBoard however still gives the same
 error..

 I tried to get JPA and Lift working together in the same way as in the
 JPADemo example.. Is it the use of MySql which prevents the example
 from working for me?

 regards,
 David

 On 23 jun, 00:54, Derek Chen-Becker dchenbec...@gmail.com wrote:
  Also, what does the schema for the entity's table look like?
 
  On Mon, Jun 22, 2009 at 4:54 PM, Derek Chen-Becker 
 dchenbec...@gmail.comwrote:
 
   Mind posting the snippet of code where you're saving the instance? A
 merge
   should interpret a null ID as a fresh instance, and a persist should
 just
   save it.
 
   Derek
 
   On Mon, Jun 22, 2009 at 1:50 PM, David Persons dhwpers...@gmail.com
 wrote:
 
   I am using MySql (5). After setting the hibernate.dialect to
   org.hibernate.dialect.MySQLDialect in my persistence.xml file, I get a
   org.hibernate.AssertionFailure: null id :-s
 
   cheers
 
   On 22 jun, 19:18, Derek Chen-Becker dchenbec...@gmail.com wrote:
That's not accurate, at least with Hibernate. By putting the
 annotations
   on
vars, the compiler ends up putting them on the internal fields,
 which
   then
forces Hibernate into a field-based persistence model and not a
getter/setter based one. The SQLGrammarException is most likely what
 the
other people have said. If you're in Oracle or PostgreSQL, for
 instance,
   you
need a sequence set up for the auto identity model. What database
 are
   you
using?
 
Derek
 
On Mon, Jun 22, 2009 at 8:54 AM, Eric Bowman ebow...@boboco.ie
 wrote:
 
 David Persons wrote:
  Hello guys,
 
  I get a org.hibernate.exception.SQLGrammarException: could not
 get
   or
  update next value error everytime I try to save the following
   Entity:
 
  @Entity
  class Scene {
@Id
@GeneratedValue(){val strategy = GenerationType.AUTO}
var id : Long = _
 
@Column{val unique = true, val nullable = false}
var ordering : Int = _
 
@Column{val unique = true, val nullable = false}
var name : String = 
 
@ManyToOne{val optional = false}
var storyBoard : StoryBoard = _
  }
 
 You almost certainly need some scala.reflect.BeanProperty
 annotations
   on
 your fields.
 
 cheers,
 Eric
 
 --
 Eric Bowman
 Boboco Ltd
 ebow...@boboco.ie
http://www.boboco.ie/ebowman/pubkey.pgp
 +35318394189/+353872801532
  http://www.boboco.ie/ebowman/pubkey.pgp%0A+35318394189/+353872801532

 


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[Lift] Re: MySQL connection pool

2009-06-25 Thread Derek Chen-Becker
The MySQL driver may have facilities for connection pooling, but generally
you use a pool provider (dbcp, c3po, etc) or write your own.

Derek

On Thu, Jun 25, 2009 at 11:31 AM, ph pkirsa...@gmail.com wrote:


 It's not strictly Lift question...

 Is connection pool a feature of MySQL JDBC driver? It is a feature of
 MySQL ODBC driver...
 Looking into this article

 http://dev.mysql.com/tech-resources/articles/connection_pooling_with_connectorj.html
 it's not clear to me wheather connection pool is implemented in
 application server or in driver itself.
 I'm planning on writing own application server and don't know if I
 need to worry about implementing connection pooling or not.

 


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[Lift] Re: Can't embed a snippet

2009-06-25 Thread Marc Boschma

Sleeping on it the snippet would be as simple as

def group(c : scala.xml.NodeSeq) : scala.xml.NodeSeq =  
scala.xml.Group(c)

which would allow for:

lift:group
h2Welcome/h2
pPut welcome details here/p
/lift:group

The advantage is that it is in the lift name space...

Marc

On 25/06/2009, at 8:59 PM, Marc Boschma wrote:


 Wouldn't this work with the Scala XML parser?

 xml:group
 h2Welcome/h2
 pPut welcome details here./p
 /xml:group
 On 25/06/2009, at 1:08 AM, Nolan Darilek wrote:





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[Lift] form element specific error messages

2009-06-25 Thread Trav

I have a form such as:

lift:Customer.newCustomer form=POST
  divnewCustomer:firstName/newCustomer:firstName/div
  divnewCustomer:lastName/newCustomer:lastName/div
  divnewCustomer:submit //div
/lift:Customer.newCustomer

and a bind:

bind(newCustomer, xhtml,
   firstName - text(XXX),
   lastName - text(XXX),
   submit - submit(XXX)
)


If I want to require that both first and last name are required, but
the form is submitted with no last name, how anyone suggest that I put
the error message *Required in the appropriate div tag next to the
text box.

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[Lift] Re: Modify CRUDify XHTML

2009-06-25 Thread Peter Robinett

Naftoli, you would overload the _editTemplate field or the
editTemplate method, I imagine.

Peter

On Jun 24, 11:49 am, Naftoli Gugenheim naftoli...@gmail.com wrote:
 How would you customize the edit view, say to allow editing all child
 entities on the same screen?

 On Wed, Jun 24, 2009 at 2:01 PM, Jeppe Nejsum Madsen je...@ingolfs.dkwrote:



  On 24 Jun 2009, Peter Robinett wrote:

   Hi all,

   I'm using CRUDify on one of my models and I'd like to display some
   additional data on the view template. I believe that I need to
   override one of the model definitions with some sort of reference to
   my own XHTML file. Which one? _viewTemplate? Or perhaps the
   viewTemplate method?

  If you look at the source to CRUDify, you'll see

  def viewTemplate(): NodeSeq = pageWrapper(_viewTemplate)

  where

  def pageWrapper(body: NodeSeq): NodeSeq =
   lift:surround with=default at=content
     {
       body
     }
   /lift:surround

  def _viewTemplate =
   lift:crud.view
     table id={viewId} class={viewClass}
       crud:row
         tr
           tdcrud:name//td
           tdcrud:value//td
         /tr
       /crud:row
     /table
   /lift:crud.view

  So the simplest thing is to override _viewTemplate with something similar
  to the above. This should be done on the companion objects where CRUDify
  is mixed in

  /Jeppe

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[Lift] Re: New mapper class: MappedEnumString

2009-06-25 Thread Oliver Lambert
On Thu, Jun 25, 2009 at 10:49 PM, Jeppe Nejsum Madsen je...@ingolfs.dkwrote:


 On Thu, Jun 25, 2009 at 1:12 AM, Oliver Lambert olambo...@gmail.com
 wrote:
 
  Looks very nice.
 
  One thing I'm wondering, what if I wanted the displayed value outside of
 the mapper, such as TestTypes.Item1.displayValue. Would you use an implicit
 conversion to provide this or is the
  display value conceptually always part of a mapper object.

 Good question :-) I'm still using CRUDify generated views while
 prototyping, but will probably need some more sophisticated layouts at
 some point. Don't yet know if the display value will come from the
 mapper object or the underlying enum.

  I have a rough implementation called EnumWithDescription, that wraps (not
 extends) an Enumeration
  and provides a description method on the enumeration value without using
 an implicit. I'm wondering
  if it might be useful to combine your approach and mine?

 Sure. It might also be possible to make the original MappedEnum a bit
 more flexible instead (as Derek suggested earlier). My class is
 basically just a copy with very few modifications to handle the db
 value. I just haven't got the Scala knowledge yet to easily see how
 the interface should be and I needed to nail the db schema :-)


No this isn't what I'm suggesting, I don't think MappedEnum should be made
flexible.
I was thinking perhaps your class could work with EnumWithDescription as
shown below, which
extends Enumeration#Values to include a description.

/*
 A wrapper arround a Scala Enumeration Value that has a name, description
for each object
 */
trait ValueWithDescription  {
def description: String
def name: String
}

abstract class EnumWithDescription  {
type Value = enum.Value with ValueWithDescription

private var _values: List[Value] = Nil
def values = _values

// possibly not a good idea using this directly
val enum = new Enumeration {
def Value(inName: String, inDescription: String): Value with
ValueWithDescription = {
new Val(nextId, inName) with ValueWithDescription {
def description = inDescription
def name = inName
}
}
}

def Value(name: String, description: String): Value = {
val value = enum.Value(name, description)
_values = _values ::: List(value)  // build in order
value
}

def Value(name: String): Value = Value(name, name)

def valueOf(name: String) = values find (_.name == name)

def nameDescriptionList = values map(x = (x.name, x.description) )

}






 /Jeppe

 


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