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Gridfield loop and count in template


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9 Posts   11344 Views

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vxd

Community Member, 19 Posts

25 February 2013 at 8:57pm

I have a gridfield and would like to count the objects and do something if count = 2.

eg:

<% loop Objects %>
$title
if ($count = 3)
<br />

<% end_loop %>

Is the above possible?

Avatar
kinglozzer

Community Member, 187 Posts

25 February 2013 at 10:02pm

Edited: 25/02/2013 10:05pm

<% if $Pos = 3 %>

Or if you mean the actual number of items in the list, you might be able to do:

<% if Objects.Count = 3 %>

Haven't tested that though, no idea if it'll work. If it doesn't work, you can create a function in your controller to count them and return true/false.

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Devlin

Community Member, 344 Posts

25 February 2013 at 10:04pm

What you're looking for is $Pos or $MultipleOf.

<% loop Objects %> 
$title 

<% if Pos = 3 %>
<br /> Position #3
<% end_if %>

<% if MultipleOf(3) %>
<br /> each third iteration
<% end_if %>

<% end_loop %>

http://doc.silverstripe.org/framework/en/reference/templates#looping-over-lists

Avatar
vxd

Community Member, 19 Posts

26 February 2013 at 1:05am

Thanks, just found the page too.

How about conditional statements?

<% if $Pos=="3" %> works

How about => or != I get errors when I use !=

"Sorry, there was a problem with handling your request."

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kinglozzer

Community Member, 187 Posts

26 February 2013 at 5:43am

There's no built-in less than/greater than, you can implement that sort of thing by creating a function in your controller. For 'not', use:

<% if not $Pos=3 %>

See here: http://doc.silverstripe.org/framework/en/reference/templates#conditional-logic

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vxd

Community Member, 19 Posts

26 February 2013 at 9:58am

Hi Kinglozzer,

Do you have an example of how to write the custom functions in the controller?

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vxd

Community Member, 19 Posts

26 February 2013 at 1:39pm

Controller

  
function MoreThen() {
    if($pos > $value) {
      return TRUE;
    } else {
      return FALSE;
    }
    

  }

Template

If the function is outside of the loop it works and returns "1"

$MoreThen(2,1) 
  <% loop GalleryObjects %>
  <% end_loop %>

If the function is inside of the loop if does not work. No value is returned.
  <% loop GalleryObjects %>
$MoreThen(2,1) 
  <% end_loop %>

Avatar
vxd

Community Member, 19 Posts

26 February 2013 at 1:48pm

Edited: 26/02/2013 1:54pm

Found it: $Top.MoreThen(2,1)

But $Pos doesn't seem to actually work.
There are 5 items so " 2 is more than 1" should be fired off twice. NOthing is returned.

 <% if Top.MoreThen($Pos,2)  %>
    2 is more than 1
    <% end_if %>

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