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Require rows passed to "loadAllFromArray()" have unique keys

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Summary:
See PHI1809, which identified a bug in Project search where queries with a large number of slugs could paginate improperly.

This change detects problems in this category: cases where multiple rows with the same ID are passed to "loadAllFromArray()". It's likely that all cases it detects are cases where a GROUP BY is missing.

Since this might have some false positives or detect some things which aren't fundamentally problematic, I'm planning to hold it until the next release.

Test Plan:
  - Reverted D21399, then created a project with multiple slugs and queried for one of them via "project.search". Hit this new exeception.
  - Browsed around a bit, didn't immediately catch any collateral damage.

Differential Revision: https://secure.phabricator.com/D21400
This commit is contained in:
epriestley 2020-07-09 10:53:20 -07:00
parent 429543b637
commit 72f149bf39
1 changed files with 12 additions and 1 deletions
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13
src/infrastructure/storage/lisk/LiskDAO.php
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@ -653,7 +653,18 @@ abstract class LiskDAO extends Phobject
foreach ($rows as $row) {
$obj = clone $this;
if ($id_key && isset($row[$id_key])) {
$result[$row[$id_key]] = $obj->loadFromArray($row);
$row_id = $row[$id_key];
if (isset($result[$row_id])) {
throw new Exception(
pht(
'Rows passed to "loadAllFromArray(...)" include two or more '.
'rows with the same ID ("%s"). Rows must have unique IDs. '.
'An underlying query may be missing a GROUP BY.',
$row_id));
}
$result[$row_id] = $obj->loadFromArray($row);
} else {
$result[] = $obj->loadFromArray($row);
}