No Relation? Pick one at random

Thursday 31 August 2006 6:23:46 am

I have lots of images in my media folder in a class called sub_image.

I add these to a page by adding them as a related object. This is working great.

However, if one isn't related I wont to automatically pick one at random to display from eveything in the class sub_image.

I'm sure that this must be possible.

Any ideas.

Thanks

Monday 04 September 2006 6:30:16 am

Thanks but I can't seem to get this to work

This is what I have

{$max=fetch('content', 'tree_count', hash(parent_node_id, 132))}
{$randsub_imaget=fetch('content', 'tree', 
        hash(parent_node_id, 132, offset, rand(0,$max), limit, 1))}
		
             {$randsub_image.data_map.title.content|wash}
	     test: {rand(0,$max)}

132 is the node in the media folder which contains my sub images.

Not only does

{$randsub_image.data_map.title.content|wash}

not return anything but

test: {rand(0,$max)}

returns test: 0 indicating that there are no items.

What am i doing wrong?

Thanks

Monday 04 September 2006 7:50:55 am

Sorry, those were just typos.

I am using 3.8.0 and I have no errors in the debug.

Thanks anyway for your help.

Tuesday 05 September 2006 2:44:42 am

Thanks again Claudia,

$max does equal 0

The anonymous user has read access to that node.

132 is the node which contains all the subimages from which I wish to select something random.

Is this correct?

Thanks

Tuesday 05 September 2006 4:12:48 am

Thanks Xavier,

Switching it to list seems to have fixed the issue.

For those interested I have ended up with this

	{def $max=fetch('content', 'list_count', hash(parent_node_id, 132))}
						{let $randSub_images=fetch('content', 'list', hash(parent_node_id, 132, offset, rand(0,$max), limit, 1))}
							{section loop=$randSub_images var=randSub_image}
								{$randSub_image.data_map.title.content|wash}
							{/section}
						{/let}

I do have one problem though.

There are currently 4 images in the folder. However, rand seems to be picking a number between 0 and 4 which means sometimes (ie when it picks 0) no image is displayed.

Can I stop it pulling out zero?

Tuesday 05 September 2006 5:13:14 am

rand (a,b) could equals b ?

I thought it was in [a..b[ (ie. never include the upper limit). Anyway, going to check if this is a problem I have for one of my site.

FYI and to solve the cache problem, what I did in your case was to fetch n images (randomly), build a javascript array with all the images' urls, and write a tiny javascript script that does the random "fetch" on the client side.

Therefore, with the same cache, I got several different random images.

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