From: Mauricio Alcayaga <gusantor@...>
Date: 2011-09-02T03:31:41+09:00
Subject: Re: help on find over find

hi Eric, hope don't bother you, I followed your suggestion and I have 
had success

I ended up with the following funtcion

@activityPeriods = coleccion.map{ |x| [x.date_created.year, 
x.date_created.month] }.uniq

as you can see, I'm getting an array of two columns [years, months] 
extracted from a collection's (named "coleccion") asking over the field 
"date_created"

question: do you know a way, using similar structure, to introduce a 
variable as field name to generate the response ? , I mean in te way of:

@activityPeriods = coleccion.map{ |x| [x.VARIABLEFIELDNAME.year, 
x.VARIABLEFIELDNAME.month] }.uniq

hope you can help, thanks in advance

Eric Wollesen wrote in post #976398:
> On Jan 20, 4:05pm, Mauricio Alcayaga <gusan...@hotmail.com> wrote:
>> this helper works fine if that collection is an association (has_many)
>> end
>> module ApplicationHelper
>> <%= yearsCalendar(User.requests) # WORKS FINE %>
>>
>> <%= yearsCalendar(Request.unRequested) #WONT WORK , RETURN ERROR:
>> "LocalJumpError: no block given" %>
>>
>> any help?, thanks in advance
>>
>> --
>> Posted viahttp://www.ruby-forum.com/.
>
> The objects returned by find(:all, ...) and User.requests are
> different, and have different APIs.  In particular, find(:all) returns
> an array, which has a find method defined on it, but it's find method
> is very different from the find on an ActiveRecord class.
>
> You might consider changing your yearsCalendar method to look more
> like this:
>
> def yearsCalendar (collection)
>   years = collection.map {|c| Time.parse(c.date_created).year}
>   years.inject("") {|c, i| c << content_tag("div", i)}
> end
>
> This avoids the fact that the collections are different classes, and
> instead uses what they have in common, ie that they both inherit the
> Enumerable module.
>
> Good luck,
>
> e.

-- 
Posted via http://www.ruby-forum.com/.