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Bensoussan Michael

2008-Oct-24 14:41 UTC

Sort an Array of ActiveRecords objects by created_at

Hi,
I have an array of activerecords objects. I''d like to sort it  by
created_at column (they all have one).
Do you see a smart way to do it ??

Thanks,

Mike
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Thorsten Müller

2008-Oct-24 14:54 UTC

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Re: Sort an Array of ActiveRecords objects by created_at

what''s wrong with:

@my_model = Model.find(:all, :order => "created_at ASC"))

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Craig Demyanovich

2008-Oct-24 15:10 UTC

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Re: Sort an Array of ActiveRecords objects by created_at

On Fri, Oct 24, 2008 at 10:59 AM, Bensoussan Michael
<pada51-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>wrote:
>
> My array is composed by different activerecord objects:
>
> my_model1 = Model.find(:all)
>
> my_model2 = Model.find(:all)
>
> @my_models = my_model1 + mymodel2
>
> and now i''d like to sort @my_models by "created_at"

@my_models = @my_models.sort_by { |m| m.created_at }

Note that Enumerable#sort_by returns a new array.

Regards,
Craig

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Bensoussan Michael

2008-Oct-24 15:12 UTC

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Re: Sort an Array of ActiveRecords objects by created_at

Yes  that''s it ! !

Thank you,
Mike.

On Oct 24, 5:10 pm, "Craig Demyanovich"
<cdemyanov...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> On Fri, Oct 24, 2008 at 10:59 AM, Bensoussan Michael
<pad...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>wrote:
>
>
>
> > My array is composed by different activerecord objects:
>
> > my_model1 = Model.find(:all)
>
> > my_model2 = Model.find(:all)
>
> > @my_models = my_model1 + mymodel2
>
> > and now i''d like to sort @my_models by "created_at"
>
> @my_models = @my_models.sort_by { |m| m.created_at }
>
> Note that Enumerable#sort_by returns a new array.
>
> Regards,
> Craig--~--~---------~--~----~------------~-------~--~----~
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Maurício Linhares

2008-Oct-24 15:15 UTC

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Re: Sort an Array of ActiveRecords objects by created_at

Even simpler:

my_model1 = Model.find(:all)
my_model2 = Model.find(:all)

@my_models = (my_model1 + mymodel2).sort_by( &:created_at )

On Fri, Oct 24, 2008 at 12:12 PM, Bensoussan Michael
<pada51-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
> Yes  that''s it ! !
>
> Thank you,
> Mike.

-- 
Maurício Linhares
http://alinhavado.wordpress.com/ (pt-br) | http://blog.codevader.com/ (en)
João Pessoa, PB, +55 83 8867-7208

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Bensoussan Michael

2008-Oct-24 15:18 UTC

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Re: Sort an Array of ActiveRecords objects by created_at

Thanks Maurício,

On Oct 24, 5:15 pm, "Maurício Linhares"
<mauricio.linha...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Even simpler:
>
> my_model1 = Model.find(:all)
> my_model2 = Model.find(:all)
>
> @my_models = (my_model1 + mymodel2).sort_by( &:created_at )
>
What the ''&'' do precisely ?
> On Fri, Oct 24, 2008 at 12:12 PM, Bensoussan Michael
<pad...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Yes  that''s it ! !
>
> > Thank you,
> > Mike.
>
> --
> Maurício Linhareshttp://alinhavado.wordpress.com/(pt-br)
|http://blog.codevader.com/(en)
> João Pessoa, PB, +55 83 8867-7208--~--~---------~--~----~------------~-------~--~----~
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Maurício Linhares

2008-Oct-24 15:31 UTC

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Re: Sort an Array of ActiveRecords objects by created_at

Hi Michael,

The &:created_at is just a shorthand for &Proc.new { |i| i.created_at }

On Fri, Oct 24, 2008 at 12:18 PM, Bensoussan Michael
<pada51-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
> Thanks Maurício,
>
> On Oct 24, 5:15 pm, "Maurício Linhares"
<mauricio.linha...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> wrote:
>> Even simpler:
>>
>> my_model1 = Model.find(:all)
>> my_model2 = Model.find(:all)
>>
>> @my_models = (my_model1 + mymodel2).sort_by( &:created_at )
>>
>
> What the ''&'' do precisely ?
>
>> On Fri, Oct 24, 2008 at 12:12 PM, Bensoussan Michael
<pad...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>
>> > Yes  that''s it ! !
>>
>> > Thank you,
>> > Mike.
>>
>> --
>> Maurício Linhareshttp://alinhavado.wordpress.com/(pt-br)
|http://blog.codevader.com/(en)
>> João Pessoa, PB, +55 83 8867-7208
> >
>


-- 
Maurício Linhares
http://alinhavado.wordpress.com/ (pt-br) | http://blog.codevader.com/ (en)
João Pessoa, PB, +55 83 8867-7208

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Bensoussan Michael

2008-Oct-24 15:34 UTC

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Re: Sort an Array of ActiveRecords objects by created_at

excellent ! Thanks for the tip.

Mike

On Oct 24, 5:31 pm, "Maurício Linhares"
<mauricio.linha...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Hi Michael,
>
> The &:created_at is just a shorthand for &Proc.new { |i|
i.created_at }
>
>
>
> On Fri, Oct 24, 2008 at 12:18 PM, Bensoussan Michael
<pad...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Thanks Maurício,
>
> > On Oct 24, 5:15 pm, "Maurício Linhares"
<mauricio.linha...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > wrote:
> >> Even simpler:
>
> >> my_model1 = Model.find(:all)
> >> my_model2 = Model.find(:all)
>
> >> @my_models = (my_model1 + mymodel2).sort_by( &:created_at )
>
> > What the ''&'' do precisely ?
>
> >> On Fri, Oct 24, 2008 at 12:12 PM, Bensoussan Michael
<pad...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> >> > Yes  that''s it ! !
>
> >> > Thank you,
> >> > Mike.
>
> >> --
> >> Maurício Linhareshttp://alinhavado.wordpress.com/(pt-br)
|http://blog.codevader.com/(en)
> >> João Pessoa, PB, +55 83 8867-7208
>
> --
> Maurício Linhareshttp://alinhavado.wordpress.com/(pt-br)
|http://blog.codevader.com/(en)
> João Pessoa, PB, +55 83 8867-7208--~--~---------~--~----~------------~-------~--~----~
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Bensoussan Michael

2008-Oct-24 16:01 UTC

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Re: Sort an Array of ActiveRecords objects by created_at

excellent ! Thanks for the tip.

Mike

On Oct 24, 5:31 pm, "Maurício Linhares"
<mauricio.linha...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Hi Michael,
>
> The &:created_at is just a shorthand for &Proc.new { |i|
i.created_at }
>
>
>
> On Fri, Oct 24, 2008 at 12:18 PM, Bensoussan Michael
<pad...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Thanks Maurício,
>
> > On Oct 24, 5:15 pm, "Maurício Linhares"
<mauricio.linha...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > wrote:
> >> Even simpler:
>
> >> my_model1 = Model.find(:all)
> >> my_model2 = Model.find(:all)
>
> >> @my_models = (my_model1 + mymodel2).sort_by( &:created_at )
>
> > What the ''&'' do precisely ?
>
> >> On Fri, Oct 24, 2008 at 12:12 PM, Bensoussan Michael
<pad...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> >> > Yes  that''s it ! !
>
> >> > Thank you,
> >> > Mike.
>
> >> --
> >> Maurício Linhareshttp://alinhavado.wordpress.com/(pt-br)
|http://blog.codevader.com/(en)
> >> João Pessoa, PB, +55 83 8867-7208
>
> --
> Maurício Linhareshttp://alinhavado.wordpress.com/(pt-br)
|http://blog.codevader.com/(en)
> João Pessoa, PB, +55 83 8867-7208--~--~---------~--~----~------------~-------~--~----~
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Frederick Cheung

2008-Oct-24 18:53 UTC

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Re: Sort an Array of ActiveRecords objects by created_at

On Oct 24, 4:31 pm, "Maurício Linhares"
<mauricio.linha...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Hi Michael,
>
> The &:created_at is just a shorthand for &Proc.new { |i|
i.created_at }
>Although it should be noted that this (also known as Symbol#to_proc)
is a lot slower than just writing the equivalent block (but not in
ruby 1.9 or if my memory is correct, 1.8.7)

Fred>
>
> On Fri, Oct 24, 2008 at 12:18 PM, Bensoussan Michael
<pad...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Thanks Maurício,
>
> > On Oct 24, 5:15 pm, "Maurício Linhares"
<mauricio.linha...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > wrote:
> >> Even simpler:
>
> >> my_model1 = Model.find(:all)
> >> my_model2 = Model.find(:all)
>
> >> @my_models = (my_model1 + mymodel2).sort_by( &:created_at )
>
> > What the ''&'' do precisely ?
>
> >> On Fri, Oct 24, 2008 at 12:12 PM, Bensoussan Michael
<pad...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> >> > Yes  that''s it ! !
>
> >> > Thank you,
> >> > Mike.
>
> >> --
> >> Maurício Linhareshttp://alinhavado.wordpress.com/(pt-br)
|http://blog.codevader.com/(en)
> >> João Pessoa, PB, +55 83 8867-7208
>
> --
> Maurício Linhareshttp://alinhavado.wordpress.com/(pt-br)
|http://blog.codevader.com/(en)
> João Pessoa, PB, +55 83 8867-7208--~--~---------~--~----~------------~-------~--~----~
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Rails - Oct 2008 - Sort an Array of ActiveRecords objects by created_at

Sort an Array of ActiveRecords objects by created_at

Re: Sort an Array of ActiveRecords objects by created_at

Re: Sort an Array of ActiveRecords objects by created_at

Re: Sort an Array of ActiveRecords objects by created_at

Re: Sort an Array of ActiveRecords objects by created_at

Re: Sort an Array of ActiveRecords objects by created_at

Re: Sort an Array of ActiveRecords objects by created_at

Re: Sort an Array of ActiveRecords objects by created_at

Re: Sort an Array of ActiveRecords objects by created_at

Re: Sort an Array of ActiveRecords objects by created_at