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Further fixes to Managed_DataObject::_allCacheKeys(): now uses self::multicacheKey() to generate the (possibly compound) keys, which makes it match the order of the keys used when calling pkeyGet(). 

This should resolve the issues darkip was reporting with user_im_prefs entries returning null immediately after insertion (seen with memcached off, so it was happening even with the built-in in-process cache in the Cache base class).

What was happening was that the initial pkeyGet() would end up saving a negative cache entry under the form with the fields sorted in the key, as via multicacheKey():

    'statusnet:blaguette:user_im_prefs:screenname,transport:brionv,sms' => 'N;'

then we'd do an insert() on the new entry, saving cache entries for the non-sorted key names returned by _allCacheKeys():

    'statusnet:blaguette:user_im_prefs:transport,screenname:sms,brionv' => 'O...'
    'statusnet:blaguette:user_im_prefs:user_id,transport:1234,sms' => 'O...'

but the next query via pkeyGet() still saw the negative lookup cache from before, and came back with null.

Now, _allCacheKeys() sorts the fields in the keys by using the same key-builder function, and queries pick up the same thing you just inserted. :)
This commit is contained in:
Brion Vibber 2011-09-29 15:21:52 -07:00
parent 69765a0550
commit 1d15037d6a
1 changed files with 6 additions and 9 deletions
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15
classes/Managed_DataObject.php
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@ -182,14 +182,13 @@ abstract class Managed_DataObject extends Memcached_DataObject
$ckeys = array();
if (!empty($table['unique keys'])) {
foreach ($table['unique keys'] as $idx => $fields) {
$keyNames = $table['unique keys'];
foreach ($keyNames as $idx => $fields) {
$val = array();
foreach ($fields as $name) {
$val[] = self::valueString($this->$name);
$val[$name] = self::valueString($this->$name);
}
$keys = implode(',', $fields);
$vals = implode(',', $val);
$ckeys[] = $this->cacheKey($this->tableName(), $keys, $vals);
$ckeys[] = self::multicacheKey($this->tableName(), $val);
}
}
@ -197,11 +196,9 @@ abstract class Managed_DataObject extends Memcached_DataObject
$fields = $table['primary key'];
$val = array();
foreach ($fields as $name) {
$val[] = self::valueString($this->$name);
$val[$name] = self::valueString($this->$name);
}
$keys = implode(',', $fields);
$vals = implode(',', $val);
$ckeys[] = $this->cacheKey($this->tableName(), $keys, $vals);
$ckeys[] = self::multicacheKey($this->tableName(), $val);
}
return $ckeys;
}