Re: [PhillyOnRails] How can I group objects with a datetime field just by date, ignoring time?

[Mike Mangino <mmangino@elevatedrails.com>]

Group by takes a block, so you can do

days = location.meetings.group_by {|meeting| meeting.start_date.to_date}
You can then sort each result by the start_date.

Mike

On Nov 19, 2007, at 9:06 AM, Jared Blitzstein wrote:

> I'm just getting back into Ruby/RoR so I'm pretty rusty on  
> everything (and I don't know Ruby that well to boot). The problem  
> I'm having is I have two classes, Location and Meeting with a 1:M  
> relationship. My Meeting class has start_date:datetime and  
> duration:integer (which is the number of minutes). I want to display  
> this data in a table with the time (7:00am, 8:00am...etc) as the X  
> axis on top and the Location as the Y axis on the left (example: http://jared.blitzstein.net/assets/2007/11/19/matrix_1.html) 
> . I was looking at the Enumerable group_by ( http://api.rubyonrails.org/classes/Enumerable.html#M001111) 
>  but it takes the time into account when I group it by start_time, I  
> want it to just use the date. Any suggestions how to display my data?
>
> I'm not opposed to changing my field types either, by doing  
> something like start_time/end_time, or start_date/start_time/ 
> end_date/end_time etc.
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--
Mike Mangino
http://www.elevatedrails.com

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