Another question related to this... I have everything grouped by
common date, but now I want to do it my month. Any ideas?
On Feb 4, 4:08 am, Rick DeNatale <rick.denat...@gmail.com> wrote:
> On Wed, Feb 3, 2010 at 3:58 AM, eggie5 <egg...@gmail.com> wrote:
> > Hi,
>
> > I have a collection of arbitrary objects that have a date attribute. I
> > want to display these objects by month. For example
>
> > @things=Thing.all
>
> > Now I want to display in a table all the things by month - how can I
> > do this? the problem isn't making a table or anything it's just the
> > logic for getting the min and max range for all the dates in things
> > and then finding the monthes to use for the scale and etc. Please give
> > suggestions.
>
> Unlike some of the other responders, I'm going to take your "arbitray
> objects" to mean that they aren't necessarily ActiveRecord models, and
> therefore SQL solutions don't apply. Assuming that each of these Ruby
> objects has a method date which returns either a Date, DateTime, or
> Time object then something like
>
> @things.group_by {|thing| thing.date.to_date.beginning_of_month }
>
> while return a hash whose keys are the dates which have at least one
> thing, and whose values are arrays of things whose dates fall within
> the month.
>
> If you know that the things all will return a Date from .date then you
> can leave out the to_date in the expression.
>
> >> def initialize(date)
> >> �...@date = date
> >> end
> >> attr_reader :date
> >> end
>
> => nil
>
> >> things = [Date.today, 2.days.from_now, 5.days.ago].map {|d| Thing.new(d)}
>
> => [#<Thing:0x00000101524828 @date=Wed, 03 Feb 2010>,
> #<Thing:0x000001015247f0 @date=2010-02-05 14:06:22 -0500>,
> #<Thing:0x00000101524780 @date=2010-01-29 14:06:22 -0500>]
>
> >> things.group_by {|t| t.date.to_date.beginning_of_month}
>
> => {
> Mon, 01 Feb 2010=>[#<Thing:0x00000101524828 @date=Wed, 03 Feb
> 2010>, #<Thing:0x000001015247f0 @date=2010-02-05 14:06:22 -0500>],
> Fri, 01 Jan 2010=>[#<Thing:0x00000101524780 @date=2010-01-29 14:06:22
> -0500>]
>
> }
>
> HTH
> --
> Rick DeNatale
>
> Blog:http://talklikeaduck.denhaven2.com/
> Twitter:http://twitter.com/RickDeNatale
> WWR:http://www.workingwithrails.com/person/9021-rick-denatale
> LinkedIn:http://www.linkedin.com/in/rickdenatale
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