do not remove records that have no primary key selected

this problem occurs when joining active record but not selecting the primary key field. records get populated but they do not have primary key value populated which results in only one record left over in the result.

do not remove records that have no primary key selected
48876791 · Carsten Brandt · de32f414 · 48876791
Commit 48876791 authored Mar 25, 2014 by Carsten Brandt
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ActiveQuery.php framework/db/ActiveQuery.php +1 -1

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--- a/framework/db/ActiveQuery.php
+++ b/framework/db/ActiveQuery.php
@@ -159,7 +159,7 @@ class ActiveQuery extends Query implements ActiveQueryInterface
                $key = $model[$pk];
                if (isset($hash[$key])) {
                    unset($models[$i]);
-                } else {
+                } elseif ($key !== null) {
                    $hash[$key] = true;
                }
            }