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PostgreSQL: Make tag cloud query work - also fixes what is surely an ignored error in the mysql query 

darcs-hash:20080911192348-f6e2c-b846b777b382386de56ca01d957dc5e55161fced.gz
This commit is contained in:
CiaranG 2008-09-11 15:23:48 -04:00
parent ce2eaf84aa
commit b13233fed4
1 changed files with 14 additions and 1 deletions
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15
actions/tag.php
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@ -88,8 +88,21 @@ class TagAction extends StreamAction {
{
# This should probably be cached rather than recalculated
$tags = DB_DataObject::factory('Notice_tag');
#Need to clear the selection and then only re-add the field
#we are grouping by, otherwise it's not a valid 'group by'
#even though MySQL seems to let it slide...
$tags->selectAdd();
$tags->selectAdd('tag');
#Add the aggregated columns...
$tags->selectAdd('max(notice_id) as last_notice_id');
$tags->selectAdd(sprintf('sum(exp(-(now() - created)/%f)) as weight', common_config('tag', 'dropoff')));
if(common_config('db','type')=='pgsql') {
$calc='sum(exp(-extract(epoch from (now()-created))/%f)) as weight';
} else {
$calc='sum(exp(-(now() - created)/%f)) as weight';
}
$tags->selectAdd(sprintf($calc, common_config('tag', 'dropoff')));
$tags->groupBy('tag');
$tags->orderBy('weight DESC');