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Dustin Withers

2006-Dec-13 21:10 UTC

Dot notation ordering

How do I order a collection returned when I''ve accessed it from dot
notation?  For example using client.products I''d like the return to be
ordered by product.part_number.  I''ve tried to do this Ruby side with
something like client.products.sort {|a, b| a.part_number >
b.part_number} and I get an error.  Any idea how to deal with this?

Thanks,
-dustin


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Greg Donald

2006-Dec-13 21:16 UTC

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Re: Dot notation ordering

On 12/13/06, Dustin Withers
<fadeddata-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
> How do I order a collection returned when I''ve accessed it from
dot
> notation?  For example using client.products I''d like the return
to be
> ordered by product.part_number.  I''ve tried to do this Ruby side
with
> something like client.products.sort {|a, b| a.part_number >
> b.part_number} and I get an error.  Any idea how to deal with this?
products = client.products.find( :all, :order => [
''part_number'' ] )


-- 
Greg Donald
http://destiney.com/

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jdswift

2006-Dec-14 00:38 UTC

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Re: Dot notation ordering

FYI Your sort code was almost right:
@products = client.products.sort {|a, b| b.part_number <=>
a.part_number}

would give you the products sorted high to low.

On Dec 14, 7:16 am, "Greg Donald"
<gdon...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> On 12/13/06, Dustin Withers
<fadedd...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>
>
> > How do I order a collection returned when I''ve accessed it
from dot
> > notation?  For example using client.products I''d like the
return to be
> > ordered by product.part_number.  I''ve tried to do this Ruby
side with
> > something like client.products.sort {|a, b| a.part_number >
> > b.part_number} and I get an error.  Any idea how to deal with
this?products = client.products.find( :all, :order => [
''part_number'' ] )
> 
> --
> Greg Donaldhttp://destiney.com/

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dblack-TKXtfPMJ4Ozk1uMJSBkQmQ@public.gmane.org

2006-Dec-14 01:11 UTC

head link

Re: Dot notation ordering

Hi --

On Thu, 14 Dec 2006, jdswift wrote:
> On Dec 14, 7:16 am, "Greg Donald"
<gdon...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> On 12/13/06, Dustin Withers
<fadedd...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>
>>> How do I order a collection returned when I''ve accessed it
from dot
>>> notation?  For example using client.products I''d like the
return to be
>>> ordered by product.part_number.  I''ve tried to do this
Ruby side with
>>> something like client.products.sort {|a, b| a.part_number >
>>> b.part_number} and I get an error.  Any idea how to deal with this?
>>>
>> products = client.products.find( :all, :order => [
''part_number'' ] )
>>
>
> FYI Your sort code was almost right:
> @products = client.products.sort {|a, b| b.part_number <=>
> a.part_number}
>
> would give you the products sorted high to low.
>
Or the slightly more concise:

   @products = client.products.sort_by {|prod| prod.part_number }


David

-- 
Q. What''s a good holiday present for the serious Rails developer?
A. RUBY FOR RAILS by David A. Black (http://www.manning.com/black)
    aka The Ruby book for Rails developers!
Q. Where can I get Ruby/Rails on-site training, consulting, coaching?
A. Ruby Power and Light, LLC (http://www.rubypal.com)

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Jeremy Evans

2006-Dec-14 04:58 UTC

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Re: Dot notation ordering

On 12/13/06, dblack-TKXtfPMJ4Ozk1uMJSBkQmQ@public.gmane.org
<dblack-TKXtfPMJ4Ozk1uMJSBkQmQ@public.gmane.org>
wrote:>
> Hi --
>
> On Thu, 14 Dec 2006, jdswift wrote:
>
> > On Dec 14, 7:16 am, "Greg Donald"
<gdon...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >> On 12/13/06, Dustin Withers
<fadedd...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >>
> >>> How do I order a collection returned when I''ve
accessed it from dot
> >>> notation?  For example using client.products I''d like
the return to be
> >>> ordered by product.part_number.  I''ve tried to do
this Ruby side with
> >>> something like client.products.sort {|a, b| a.part_number >
> >>> b.part_number} and I get an error.  Any idea how to deal with
this?
> >>>
> >> products = client.products.find( :all, :order => [
''part_number'' ] )
> >>
> >
> > FYI Your sort code was almost right:
> > @products = client.products.sort {|a, b| b.part_number <=>
> > a.part_number}
> >
> > would give you the products sorted high to low.
> >
>
> Or the slightly more concise:
>
>    @products = client.products.sort_by {|prod| prod.part_number }
Or the slightly more concise:

  @products = client.products.sort_by &:part_number

;)

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Greg Donald

2006-Dec-14 20:57 UTC

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Re: Dot notation ordering

On 12/13/06, Jeremy Evans
<jeremyevans0-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>   @products = client.products.sort_by &:part_number
Where is this behavior documented?


Thanks,

-- 
Greg Donald
http://destiney.com/

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Greg Donald

2006-Dec-14 21:09 UTC

head link

Re: Dot notation ordering

On 12/14/06, Greg Donald <gdonald-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> >   @products = client.products.sort_by &:part_number
>
> Where is this behavior documented?
Nevermind, I found it:
> cat
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/symbol.rb
class Symbol
  # Turns the symbol into a simple proc, which is especially useful
for enumerations. Examples:
  #
  #   # The same as people.collect { |p| p.name }
  #   people.collect(&:name)
  #
  #   # The same as people.select { |p| p.manager? }.collect { |p| p.salary }
  #   people.select(&:manager?).collect(&:salary)
  def to_proc
    Proc.new { |obj, *args| obj.send(self, *args) }
  end
end


-- 
Greg Donald
http://destiney.com/

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Dustin Withers

2006-Dec-15 01:03 UTC

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Re: Dot notation ordering

Excellent.  Thank you all for the great answers...

-dustin


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dblack-TKXtfPMJ4Ozk1uMJSBkQmQ@public.gmane.org

2006-Dec-15 01:17 UTC

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Re: Dot notation ordering

Hi --

On Thu, 14 Dec 2006, Greg Donald wrote:
>
> On 12/14/06, Greg Donald
<gdonald-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>>   @products = client.products.sort_by &:part_number
>>
>> Where is this behavior documented?
>
> Nevermind, I found it:
>
>> cat
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/symbol.rb
>
> class Symbol
>  # Turns the symbol into a simple proc, which is especially useful
> for enumerations. Examples:
>  #
>  #   # The same as people.collect { |p| p.name }
>  #   people.collect(&:name)
>  #
>  #   # The same as people.select { |p| p.manager? }.collect { |p| p.salary
}
>  #   people.select(&:manager?).collect(&:salary)
>  def to_proc
>    Proc.new { |obj, *args| obj.send(self, *args) }
>  end
> end
It''s also in the development version of Ruby (1.9):

   $ /usr/local/lib/ruby-cvs/bin/ruby -ve ''p %w{ a b c
}.map(&:upcase)''
   ruby 1.9.0 (2006-12-09 patchlevel 0) [i686-linux]
   ["A", "B", "C"]


David

-- 
Q. What''s a good holiday present for the serious Rails developer?
A. RUBY FOR RAILS by David A. Black (http://www.manning.com/black)
    aka The Ruby book for Rails developers!
Q. Where can I get Ruby/Rails on-site training, consulting, coaching?
A. Ruby Power and Light, LLC (http://www.rubypal.com)

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Rails - Dec 2006 - Dot notation ordering

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