diff --git a/GLPIAPI.py b/GLPIAPI.py
index 4e380d2..e53294c 100644
--- a/GLPIAPI.py
+++ b/GLPIAPI.py
@@ -103,10 +103,19 @@ class GLPIAPI:
                 
         return None, None, 0
     
-    def GetItems(self, itemType, fieldId=None, fieldValue=None):
+    def GetItems(self, itemType, fieldName=None, fieldValue=None):
+        '''
+        Search for items of a specific item type in GLPI. A filter can be set using fieldName and fieldValue :
+        fieldName: must be the name of the field as visible in GLPI
+        fieldValue: a string
+        If only itemType is set, it will search for all items
         
+        Return a tuple with item id (in a list if there are more than 1), item data (in a list of dict items) and item count (int).
+        If the query does not succeed it will return a tuple with the http status code instead of item data (e.g. None, 400, 0).
+        '''
         searchAll = False
-        if(fieldId != None and fieldValue != None):
+        if(fieldName != None and fieldValue != None):
+            fieldId = list(self.GetSearchOptions(itemType, fieldName))[0]
             # Recherche en fonction de l'utilisateur de l'appareil
             search_parameter = f'is_deleted=0&criteria[0][field]={fieldId}&withindexes=true&criteria[0][searchtype]=contains&criteria[0][value]=^{fieldValue}$'
         else:
@@ -128,13 +137,13 @@ class GLPIAPI:
                 return itemID, data, search["totalcount"]
             elif(search["totalcount"] > 1):
                 if(searchAll):
-                    # return None since id can be in a different key based on itemtype
-                    itemID = None
+                    idFieldNumber = list(self.GetSearchOptions(itemType, 'id'))[0]
+                    itemID = [i[idFieldNumber] for i in search["data"]]
                 else:
                     itemID = list(search["data"].keys())
                 return itemID, search["data"], search["totalcount"]
                 
-        return None, None, 0
+        return None, search.status, 0
     
     def GetUsers(self, username=None, email=None):
         '''