Array help

Rails
1

Hi…

@list.each do |f|

    chatfile = ChatfileInfo.find_all_by_id(f.chat_id)

end

Is it possible to simplyfy the array iteration in one line…

Thanks

2

2010/1/19 Newb N. [email protected]:

Hi…

@list.each do |f|

    chatfile = ChatfileInfo.find_all_by_id(f.chat_id)

end

Is it possible to simplyfy the array iteration in one line…

@list.each { |f| chatfile = ChatfileInfo.find_all_by_id(f.chat_id) }

There is not much point, whether one line or several, though as at the
end chatfile will be set to the last one so this would be better

chatfile = ChatfileInfo.find_all_by_id(@list.last.chat_id) if @list.last

and what is this find_all_by_id anyway, should that be find_by_id?

Colin

3

On Jan 19, 2010, at 6:12 AM, Colin L. wrote:

Colin
Well, guessing a bit about what you mean:

Given a list of things having a chat_id, find all the ChatfileInfo
records that correspond. And building on Colin’s question, I’m
assuming that the ChatfileInfo#id is the primary key.

chatfile = ChatfileInfo.find(@list.map(&:chat_id))

Now this might not be anything close to what you really want. If your
entire loop is represented by your original post, then Colin’s
simplification is right.

What are you really trying to do?

-Rob

Rob B. http://agileconsultingllc.com
[email protected]

4

Hi
Try to apply the proper model relation ship.That will be more easier

Sijo