- Patch #631048 by yched: number rounding should not be done by widgets.

modules/field/field.api.php

@@ -397,6 +397,15 @@ function hook_field_validate($obj_type, $object, $field, $instance, $langcode, &
  *   $object->{$field['field_name']}[$langcode], or an empty array if unset.
  */
 function hook_field_presave($obj_type, $object, $field, $instance, $langcode, &$items) {
+  if ($field['type'] == 'number_decimal') {
+    // Let PHP round the value to ensure consistent behavior across storage
+    // backends.
+    foreach ($items as $delta => $item) {
+      if (isset($item['value'])) {
+        $items[$delta]['value'] = round($item['value'], $field['settings']['scale']);
+      }
+    }
+  }
 }
 
 /**

modules/field/modules/number/number.module

@@ -191,6 +191,21 @@ function number_field_validate($obj_type, $object, $field, $instance, $langcode,
   }
 }
 
+/**
+ * Implements hook_field_presave().
+ */
+function number_field_presave($obj_type, $object, $field, $instance, $langcode, &$items) {
+  if ($field['type'] == 'number_decimal') {
+    // Let PHP round the value to ensure consistent behavior across storage
+    // backends.
+    foreach ($items as $delta => $item) {
+      if (isset($item['value'])) {
+        $items[$delta]['value'] = round($item['value'], $field['settings']['scale']);
+      }
+    }
+  }
+}
+
 /**
  * Implement hook_content_is_empty().
  */
@@ -349,12 +364,6 @@ function number_field_widget_validate($element, &$form_state) {
       if ($type == 'decimal' || $type == 'float') {
         $value = strtr($value, $field['settings']['decimal_separator'], '.');
       }
-      // Let PHP round the value to ensure consistent behavior across storage
-      // backends.
-      // @todo This should be done at field level.
-      if ($type == 'decimal') {
-        $value = round($value, $field['settings']['scale']);
-      }
       form_set_value($element, $value, $form_state);
     }
   }