[CRUD] make index query more abstract.

Improve build and count query in default index action to be customized
in one dedicated method.

CHANGELOG.md

@@ -131,3 +131,11 @@ Version 1.5.19
 
 - [address] add a "homeless" characteristic to addresses ;
 
+Version 1.5.20
+==============
+
+- [CRUD] make index query more abstract.
+
+    Improve build and count query in default index action to be customized 
+    in one dedicated method.
+

CRUD/Controller/CRUDController.php

@@ -276,6 +276,26 @@ class CRUDController extends AbstractController
      */
     protected function onPostIndexFetchQuery(string $action, Request $request, int $totalItems, PaginatorInterface $paginator, $entities) { }
     
+    /**
+     * Build the base query for listing all entities, normally use in a listing
+     * page.
+     * 
+     * This base query does not contains any `WHERE` or `SELECT` clauses. Those
+     * are added by other methods, like `queryEntities` and `countQueries`.
+     * 
+     * @param string $action
+     * @param Request $request
+     * @return QueryBuilder
+     */
+    protected function buildQueryEntities(string $action, Request $request)
+    {
+        return $this->getDoctrine()->getManager()
+            ->createQueryBuilder()
+            ->select('e')
+            ->from($this->getEntityClass(), 'e')
+            ;
+    }
+    
     /**
      * Query the entity.
      * 
@@ -292,17 +312,12 @@ class CRUDController extends AbstractController
      */
     protected function queryEntities(string $action, Request $request, PaginatorInterface $paginator)
     {
-        $query = $this->getDoctrine()->getManager()
-            ->createQueryBuilder()
-            ->select('e')
-            ->from($this->getEntityClass(), 'e')
+        $query = $this->buildQueryEntities($action, $request)
             ->setFirstResult($paginator->getCurrentPage()->getFirstItemNumber())
-            ->setMaxResults($paginator->getItemsPerPage())
-            ;
+            ->setMaxResults($paginator->getItemsPerPage());
         
-        $this->orderQuery($action, $query, $request, $paginator);
-        
-        return $query;
+        // allow to order queries and return the new query
+        return $this->orderQuery($action, $query, $request, $paginator);
     }
     
     
@@ -344,8 +359,9 @@ class CRUDController extends AbstractController
      */
     protected function countEntities(string $action, Request $request): int
     {
-        return $this->getDoctrine()->getManager()
-            ->createQuery("SELECT COUNT(e) FROM ".$this->getEntityClass()." e")
+        return $this->buildQueryEntities($action, $request)
+            ->select('COUNT(e)')
+            ->getQuery()
             ->getSingleScalarResult()
             ;
     }