rel #21441 : auto create custom fields root thesaurus as needed

library/Class/CodifThesaurus.php

@@ -51,8 +51,16 @@ class Class_CodifThesaurusLoader extends Storm_Model_Loader {
 
 
   public function findCustomFieldsRoot() {
-    return Class_CodifThesaurus::getLoader()
-      ->findFirstBy(['id_thesaurus' => Class_CodifThesaurus::ROOT_CUSTOMFIELD_ID]);
+    if ($root = Class_CodifThesaurus::getLoader()
+        ->findFirstBy(['id_thesaurus' => Class_CodifThesaurus::ROOT_CUSTOMFIELD_ID]))
+      return $root;
+
+    $attributes = ['id_thesaurus' => Class_CodifThesaurus::ROOT_CUSTOMFIELD_ID,
+                   'libelle' => 'Champs personnalisés',
+                   'code' => Class_CodifThesaurus::CODE_CUSTOMFIELDS];
+    $root = Class_CodifThesaurus::newInstance($attributes);
+
+    return $root->save() ? $root : null;
   }