diff --git a/paramecio/cromosoma/webmodel.py b/paramecio/cromosoma/webmodel.py
index 3e0825d..78c3af5 100644
--- a/paramecio/cromosoma/webmodel.py
+++ b/paramecio/cromosoma/webmodel.py
@@ -609,8 +609,14 @@ class WebModel:
         
         # Array intersect for obtain the valid fields
         
-        fields =  list(set(keys) & set(arr_select))
-        
+        #fields =  list(set(keys) & set(arr_select))
+        fields=[ select for select in arr_select if select in keys ]
+        """
+        for select in arr_select:
+            if select in keys:
+                fields.append(select)
+        """
+
         #Creating the fields
         arr_repeat_field={}
         
@@ -758,7 +764,7 @@ class WebModel:
     def select_to_array(self, fields_selected=[], raw_query=0):
         
         if len(fields_selected)==0:
-            fields_selected=self.fields.keys()
+            fields_selected=list(self.fields.keys())
         
         if (self.name_field_id not in fields_selected):
             fields_selected.append(self.name_field_id)
@@ -804,7 +810,7 @@ class WebModel:
                 return str(index)
         
         if len(fields_selected)==0:
-            fields_selected=self.fields.keys()
+            fields_selected=list(self.fields.keys())
         
         if (self.name_field_id not in fields_selected):
             fields_selected.append(self.name_field_id)
diff --git a/tests/webmodeltest.py b/tests/webmodeltest.py
index e6da8f4..644a4a4 100644
--- a/tests/webmodeltest.py
+++ b/tests/webmodeltest.py
@@ -83,7 +83,7 @@ class TestWebModelMethods(unittest.TestCase):
         
         print('Select a row')
         
-        self.assertEqual(model.select_a_row(1, ['title']), {'title': 'Example title Updated'})
+        self.assertEqual(model.select_a_row(1, ['title', 'inexistent_field']), {'title': 'Example title Updated'})
         
         print('Select a row with different conditions to search id')