added method to properly quote IN (...) strings

Ticket: 383

lib/Doctrine/Query.php

@@ -811,19 +811,20 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
                     case 'mysql':
                         // mysql doesn't support LIMIT in subqueries
                         $list     = $this->_conn->execute($subquery, $params)->fetchAll(Doctrine::FETCH_COLUMN);
-                        $subquery = implode(', ', $list);
+                        $subquery = $this->inConditionFromArray($list);
                         break;
                     case 'pgsql':
                         // pgsql needs special nested LIMIT subquery
-                        $subquery = 'SELECT doctrine_subquery_alias.' . $table->getIdentifier(). ' FROM (' . $subquery . ') AS doctrine_subquery_alias';
+                        $subquery = ' IN (SELECT doctrine_subquery_alias.' . $table->getIdentifier(). ' FROM (' . $subquery . ') AS doctrine_subquery_alias)';
                         break;
                 }
 
                 $field = $this->getTableAlias($rootAlias) . '.' . $table->getIdentifier();
 
                 // only append the subquery if it actually contains something
-                if ($subquery !== '') {
-                    array_unshift($this->parts['where'], $this->_conn->quoteIdentifier($field) . ' IN (' . $subquery . ')');
+                if ($subquery !== '')
+                {
+                    array_unshift($this->parts['where'], $this->_conn->quoteIdentifier($field) . $subquery);
                 }
 
                 $modifyLimit = false;
@@ -983,7 +984,6 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
         }
 
         $subquery = implode(' ', $parts);
-
         return $subquery;
     }
     /**
@@ -1273,7 +1273,41 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
         }
 
         return $this->_aliasMap[$componentAlias];
-    }
+    }
+    
+    /**
+     * inConditionFromArray
+     * 
+     * explode array into quoted array (quick and dirty)
+     * 
+     * @param array $values
+     * 
+     * @return mixed - SQL list of conditions passed, or false if empty
+     */
+    //TODO: check column type instead of first array value?
+    //TODO: is there cleaner value quoting as part of Doctrine somewhere?
+    public function inConditionFromArray(array $values)
+    {
+        if (empty($values))
+            return false;
+        
+        $list_values = ' IN (';
+        
+        // is first value a string? then assume column is.
+        if (is_string($values[0]))
+        {
+            foreach ($values as &$value)
+            {
+                $value = '\'' . $value . '\'';
+            }
+        }
+        
+        $list_values .= implode(', ', $values);
+        $list_values .= ')';
+        
+        return $list_values;
+    }
+    
     /**
      * loadRoot
      *