(Trying out
http://www.assembla.com/wiki/show/breakoutdocs/Email2TicketsGateway by
forwarding the thread.)

---------- Forwarded message ----------
From: David Pollak <feeder.of.the.bears@gmail.com>
Date: Sun, Aug 7, 2011 at 9:00 AM
Subject: Re: [Lift] Re: SortedMapperPaginatorSnippet initialSort
To: liftweb@googlegroups.com




On Sun, Aug 7, 2011 at 5:07 AM, Naftoli Gugenheim <naftoligug@gmail.com>wrote:

> I could really just change it to eq instead of ==. You're point is true as
> well, that I could do == on each's getClass.
>

Whoops... I forgot about eq... years of Scala has apparently blinded me to
stuff that's normal in Java... sigh. :-(


>
> But, don't you agree that it would be correct for
> MyMetaMapper.fieldA==MyMetaMapper.fieldB to return false?
>

Yeah... you're right (and thank you for being patient and walking me through
the implications.) Could you open a ticket? You're welcome to own the
ticket or assign it to me.


> In scala a lot of things depend on a good equals implementation. For
> instance, what if I want a Map[MappedField[_,_], X], or a
> Set[MappedField[_,_]? Also, I think people in the FP world consider it bad
> practice to use eq.
>
>
> On Sat, Aug 6, 2011 at 4:21 AM, David Pollak <
> feeder.of.the.bears@gmail.com> wrote:
>
>> AH... I understand now...
>>
>> I do not know how to compare two JVM references to see if they point to
>> the same underlying object. It's possible in .Net, but not in Java.
>>
>> In this particular instance, you might try comparing the class for each
>> field because each field has a discrete class (at least I think they should)
>> and the classes should be different between two different fields... does
>> this help?
>>
>>
>> On Sat, Aug 6, 2011 at 12:12 AM, Naftoli Gugenheim <naftoligug@gmail.com>wrote:
>>
>>> The real question is, given two MappedFields, what's the correct way to
>>> test if they are they are the same *field*?
>>> The context is that when you click a sort header of a paginator, it has
>>> to check whether it's the currently selected header and if so toggle between
>>> ascending and descending, or else default to ascending.
>>>
>>> But being that the signature of equals is that it takes an AnyRef, I
>>> think the principle of least surprise suggests that two different fields are
>>> not equal, even if they have the same value (or, being on a MetaMapper
>>> instance, having a meaningless value).
>>>
>>>
>>> On Fri, Aug 5, 2011 at 5:31 AM, David Pollak <
>>> feeder.of.the.bears@gmail.com> wrote:
>>>
>>>>
>>>>
>>>> On Fri, Aug 5, 2011 at 12:30 AM, Naftoli Gugenheim <
>>>> naftoligug@gmail.com> wrote:
>>>>
>>>>> DPP, is that desired behavior, that MyMetaMapper.fieldA ==
>>>>> MyMetaMapper.fieldB?
>>>>>
>>>>
>>>> I don't think it's valid to compare fields on the MetaMapper... they
>>>> should contain no valid values. Is that the question or did I miss
>>>> something?
>>>>
>>>>
>>>>>
>>>>>
>>>>> On Thu, Aug 4, 2011 at 5:49 PM, Larry Morroni <larry@morroni.com>wrote:
>>>>>
>>>>>> They both evaluate to true on first page load and all successive page
>>>>>> loads.
>>>>>>
>>>>>> On Jul 22, 6:19 pm, Naftoli Gugenheim <naftoli...@gmail.com> wrote:
>>>>>> > Perhaps it's a bug. Can you tell me what the following evaluate to?
>>>>>> > ClaimView.lastName == ClaimView.firstName
>>>>>> > ClaimView.lastName == ClaimView.lastName
>>>>>> >
>>>>>> > If the answers are not false and true respectively, then line 78 of
>>>>>> > net/liftweb/mapper/view/Paginator.scala should be changed to use eq
>>>>>> (or the
>>>>>> > equality implementation should change).
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> > On Fri, Jul 22, 2011 at 2:34 PM, Larry Morroni <la...@morroni.com>
>>>>>> wrote:
>>>>>> > > seems that if I add
>>>>>> > > sort = (0,false)
>>>>>> > > then I get the list sorted by the first mapped item. It seems
>>>>>> like I
>>>>>> > > shouldn't need this since I already tell it what my initialSort is
>>>>>> >
>>>>>> > > On Jul 22, 12:09 pm, Larry Morroni <la...@morroni.com> wrote:
>>>>>> > > > I am running Lift 2.4-M1 and I can't get the initialSort on
>>>>>> > > > SortedMapperPaginatorSnippet to work. No matter what I set, it
>>>>>> sorts
>>>>>> > > > by the column firstName. I can reproduce this on multiple
>>>>>> mappers of
>>>>>> > > > mine. Does anyone see anything wrong with the syntax or could
>>>>>> this
>>>>>> > > > possibly be a bug?
>>>>>> >
>>>>>> > > > val paginator = new SortedMapperPaginatorSnippet(ClaimView,
>>>>>> > > > ClaimView.lastName,
>>>>>> > > > "updatedAt" -> ClaimView.updatedAt,
>>>>>> > > > "firstName" -> ClaimView.firstName,
>>>>>> > > > "lastName" -> ClaimView.lastName,
>>>>>> > > > "claimNumber" -> ClaimView.claimNumber,
>>>>>> > > > "streetAddress" -> ClaimView.streetAddress,
>>>>>> > > > "dateOfLoss" -> ClaimView.dateOfLoss,
>>>>>> > > > "status" -> ClaimView.status
>>>>>> > > > )
>>>>>> > > > {
>>>>>> > > > ...}
>>>>>> >
>>>>>> > > > Thanks,
>>>>>> > > > Larry
>>>>>> >
>>>>>> > > --
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>>>>>>
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>>>>>>
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>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Lift, the simply functional web framework http://liftweb.net
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>>
>>
>>
>> --
>> Lift, the simply functional web framework http://liftweb.net
>> Simply Lift http://simply.liftweb.net
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>
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--
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Simply Lift http://simply.liftweb.net
Follow me: http://twitter.com/dpp
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