3 columns

Rails
1

Hi all,

Not really sure what to put in the title so hope people still open this!

What I want to do is produce something like this

Col1 Col2 Col3
data1 data2 data3
data4 data5 data6
data7 data8 data9
data… data… data…
data… data… data…
data-n data-n+1 data-n+2

I can get the data back from my db happily, but I cant for the life of
me work out how to actually display it. Single column is easy, but
anything else has me stumped.

Can anyone help?

Thanks

Jonathan

2

I’d normally have an iterator that increments each loop and if it’s
divisible by 3 print a closing tr tag and start another table row.
other than that print every value inside a table cell.

Ross

3

Ross R. wrote:

I’d normally have an iterator that increments each loop and if it’s
divisible by 3 print a closing tr tag and start another table row.
other than that print every value inside a table cell.

Ross

if @results contains ur class objects:

<% @results.each do |obj| -%> <% end -%>
<%= obj.col1 %> <%= obj.col2 %> <%= obj.col3 %>
4

Yes but that only works if you are doing one table row per db row. I
thought the original question implied that he was iterating through a
DB and every third DB row would drop to another table row.

Ross

5

Ross R. wrote:

Yes but that only works if you are doing one table row per db row. I
thought the original question implied that he was iterating through a
DB and every third DB row would drop to another table row.

Ross

Something like that?

<% @results.each_with_index do |obj, i| -%> <%= "" if 2 == i.modulo(3) -%> <% end -%>
<%= obj.col1 %> <%= obj.col2 %> <%= obj.col3 %>
6

Yes that’s what I was thinking…

7

Thanks to both of you! Saved me hours of head scratching!

What I ended up with is the following,

<% @results.each_with_index do |obj, i| -%> <%= "" if 2 == i.modulo(3) -%> <% end -%>
<%= obj.columnvalue%>

Which gives me the following:

record1.colvalue record2.colvalue record3.colvalue
record4.colvalue record5.colvalue record6.colvalue
record7.colvalue record8.colvalue record9.colvalue

Thanks once again for pushing me in the right direction.

Jonathan

8

Did you try in_groups_of ?

Check out
http://weblog.rubyonrails.com/2006/3/1/new-in-rails-enumerable-group_by-and-array-in_groups_of
for a short tutorial.

9

oomtuinstoel wrote:

Did you try in_groups_of ?

Check out
Peak Obsession
for a short tutorial.

Very nice!

10

Hello Jonathan,

Thanks to both of you! Saved me hours of head scratching!

What I ended up with is the following,

<% @results.each_with_index do |obj, i| -%> <%= "" if 2 == i.modulo(3) -%> <% end -%>
<%= obj.columnvalue%>

You can also use Array#in_groups_of :

<% @results.map(&:columnvalue).in_groups_of(3, fill_with=' ') do |group| -%> <% for col in group -%> <% end -%> <% end -%>
<%= col %>

There will be "

 " code that will pad your table
if the size of @results is not a multiple of 3.

РJean-Fran̤ois.

11

Ok so I’m a newbie, and I’m confused!

I want to also disply the reulst in columns, nut only two. I begin my
loop with:

<% for @post in @posts %>

<% end %>

How can I get this to display in two colums rather than one?
Thanks

12

Here is what i got so far.

<% (@post = Post.find(:all)).to_a.in_groups_of(3) do |group| %> <% group.each do |title| %> <% end %> <% end %>
<%= title %>

title = column value in db.

I get in return the right table div’s, but no info only hashes. It looks
like this when render:

So I know the columns are working, but how do I get it to display the
data?