change query

lib/Alchemy/Phrasea/Controller/Api/V1Controller.php

@@ -1264,7 +1264,7 @@ class V1Controller extends Controller
 
                 $selections = $this->findDataboxById($databoxId)
                     ->getRecordRepository()
-                    ->findChildren($storyIds, $user,0, $story_max_items);
+                    ->findChildren($storyIds, $user,1, $story_max_items);
                 $children[$databoxId] = array_combine($storyIds, $selections);
             }
 
@@ -1655,7 +1655,7 @@ class V1Controller extends Controller
             $max_items = (int)$request->get('max_items')?:10;
             $page = (int)$request->get('page')?:1;
 
-            $offset = $max_items * ($page - 1);
+            $offset = $max_items * ($page - 1) + 1;
         }
 
         $caption = $story->get_caption();

lib/Alchemy/Phrasea/Databox/Record/LegacyRecordRepository.php

@@ -120,7 +120,7 @@ class LegacyRecordRepository implements RecordRepository
         return $this->mapRecordsFromResultSet($result);
     }
 
-    public function findChildren(array $storyIds, $user = null, $offset = 0, $max_items = null)
+    public function findChildren(array $storyIds, $user = null, $offset = 1, $max_items = null)
     {
         if (!$storyIds) {
             return [];
@@ -129,9 +129,54 @@ class LegacyRecordRepository implements RecordRepository
         $connection = $this->databox->get_connection();
 
         $selects = $this->getRecordSelects();
-        array_unshift($selects, 's.rid_parent as story_id', 's.ord');
+
+        if($max_items){
+            array_unshift($selects, 'sr.rid_parent as story_id');
+
+            $subBuilder = $connection->createQueryBuilder();
+
+            $subBuilder
+                ->select('s.*,
+                    IF(@old_rid_parent != s.rid_parent, @cpt := 1, @cpt := @cpt+1) AS CPT')
+                ->addSelect("IF(@old_rid_parent != s.rid_parent, IF(@old_rid_parent:=s.rid_parent,'NEW PARENT',0), '----------') AS Y")
+                ->from('regroup', 's')
+                ->where('s.rid_parent IN (:storyIds)')
+                ->setParameter('storyIds', $storyIds, Connection::PARAM_INT_ARRAY)
+                ->orderBy('s.rid_parent, s.ord')
+            ;
+
+            $builder = $subBuilder->getConnection()->createQueryBuilder();
+
+            $builder->select($selects)
+                ->from(sprintf('( %s )', $subBuilder->getSQL()), 'sr')
+                ->innerJoin('sr', 'record', 'r', 'r.record_id = sr.rid_child')
+                ->where('sr.CPT BETWEEN :offset AND :maxresult')
+                ->andWhere('r.parent_record_id = 0')
+                ->setParameter('offset', $offset)
+                ->setParameter('maxresult', ($offset + $max_items -1))
+                ->orderBy('story_id, sr.CPT')
+            ;
+
+            if (null !== $user) {
+                $this->addUserFilter($builder, $user);
+            }
+
+            $connection->executeQuery('SET @cpt = 1');
+
+            $connection->executeQuery('SET @old_rid_parent = -1');
+
+
+            $data = $connection->fetchAll(
+                $builder->getSQL(),
+                array_merge($subBuilder->getParameters(), $builder->getParameters()),
+                array_merge($subBuilder->getParameterTypes(), $builder->getParameterTypes())
+            );
+
+        }else{
+            array_unshift($selects, 's.rid_parent as story_id');
 
             $builder = $connection->createQueryBuilder();
+
             $builder
                 ->select($selects)
                 ->from('regroup', 's')
@@ -147,12 +192,8 @@ class LegacyRecordRepository implements RecordRepository
                 $this->addUserFilter($builder, $user);
             }
 
-        if($max_items){
-            $builder->having('s.ord >= '. $offset .' and s.ord < '. ($offset + $max_items))
-                    ->addOrderBy('s.ord', 'ASC');
-        }
-
             $data = $connection->fetchAll($builder->getSQL(), $builder->getParameters(), $builder->getParameterTypes());
+        }
 
         $records = $this->mapRecordsFromResultSet($data);