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Author
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Message
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Alexandre Cunha
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Tuesday 16 May 2006 12:41:08 am
Hello, I noticed 3.8 haves a new "rand" operator. My questions is how to get random content using the sample template code:
$photos=fetch( 'content', 'tree', hash ( parent_node_id, 170,
limit, 6,
class_filter_type, include,
class_filter_array, array( 'image' ),
sort_by, array( 'published', false() ) ) )
The documentation pages doest include any reference to this new operator. Any help ?
http://AlexandreCunha.com
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Marc Boon
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Tuesday 16 May 2006 5:19:08 am
A quick look in ezpublish/lib/eztemplate/classes/eztemplateartihmeticoperator.php tells me that it's just a wrapper for the PHP mt_rand() function:
http://www.php.net/manual/en/function.mt-rand.php
int mt_rand ( [int min, int max] )
When called with no parameters it returns an integer between 0 and MAX_INT (2^31-1), when called with two parameters it returns an integer in the range min, max. So to get a random object you can do something like this:
{$max=fetch('content', 'tree_count', hash(parent_node_id, 2))}
{$node=fetch('content', 'tree', hash(parent_node_id, 2, offset, rand(0,$max), limit, 1))}
Add class and/or attribute filters to both fetches as appropiate.
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Xavier Dutoit
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Tuesday 16 May 2006 6:34:21 am
Hi marc, Very elegant solution, IMO. Thanks for sharing the tip! X+
http://www.sydesy.com
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Christian Johansen
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Wednesday 21 June 2006 7:14:31 am
That's fine when you want one random node/object/class/whatever, but is there a way to get 10 random nodes in a single fetch?
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Matthew Carroll
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Saturday 24 June 2006 4:29:52 pm
I can't think of any way to fetch multiple random nodes with a single fetch. The only solution that comes to mind is to use a while loop to pushes randomly selected nodes onto an array:
http://ez.no/doc/ez_publish/technical_manual/3_8/reference/template_control_structures/looping/while
http://ez.no/doc/ez_publish/technical_manual/3_8/reference/template_operators/arrays/prepend You probably want to make sure you don't end up with duplicate elements too: http://ez.no/doc/ez_publish/technical_manual/3_8/reference/template_operators/arrays/unique ...that should help you end up with a nice array of 10 randomly selected, unique nodes.
Good luck
Matthew
http://carroll.org.uk
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Frédéric RAYMOND
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Thursday 19 April 2007 2:33:57 am
Hi, Marc Boon's solution is nice, but I think you should "dec" $max before calling the rand operator inside the fetch. bye !
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Softriva .com
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Friday 20 April 2007 4:16:23 am
Probably we need a {def.....} like
{def $max=fetch('content', 'tree_count', hash(parent_node_id, 2))}
{def $node=fetch('content', 'tree', hash(parent_node_id, 2, offset, rand(0,$max), limit, 1))}
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Ludovic Gasc
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Friday 23 May 2008 4:24:57 am
Hi,
To work correctly, I need to add this in the code:
{def $max=sum(fetch('content', 'tree_count', hash('parent_node_id', 175)),-1)}
{def $random_project=fetch('content', 'tree', hash('parent_node_id', 175, 'offset', rand(0,$max), 'limit', 1))}
Without -1, I have sometimes an empty value because the offset generated is too high.
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Christopher Grondahl
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Monday 28 June 2010 2:10:12 pm
You could also try to add shuffle to the end of your fetch-string, something like: {$photos=fetch( 'content', 'tree', hash ( parent_node_id, 170,
limit, 6,
class_filter_type, include,
class_filter_array, array( 'image' ),
sort_by, array( 'published', false() ) ) )|shuffle}
Chris
ez site: http://www.acem.no
Every day is Groundhog Day
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