support multiple comma-separated values in index methods

services-multivalue-index.patch

diff --git a/services.module b/services.module
index d620a2a..02b3b98 100644
--- a/services.module
+++ b/services.module
@@ -441,15 +441,16 @@ function _services_resource_controller_as_procedure($resource, $name, $controlle
  *   Integer page number we are requesting.
  * @param $fields
  *   Array fields to return.
- * @param $parameter
+ * @param $service_parameters
  *   Array parameters to add to the index query.
  * @param $page_size
  *   Integer number of items to be returned.
  * @param $resource
  *   String name of the resource building the index query
  */
-function services_resource_build_index_query($schema, $order, $page, $fields, $parameters = array(), $primary_table, $primary_field, $page_size, $resource) {
+function services_resource_build_index_query($schema, $order, $page, $fields, $service_parameters = array(), $primary_table, $primary_field, $page_size, $resource) {
   $where = array();
+  $query_parameters = array();
   $fields = db_escape_string($fields);

   // need to append table prefix
@@ -465,9 +466,20 @@ function services_resource_build_index_query($schema, $order, $page, $fields, $p
   $schema = drupal_get_schema($schema);
   // Build an array of fields with the appropriate placeholders for use in
   // db_query().
-  if (is_array($parameters)) {
-    foreach ($parameters as $field => $value) {
-      $where[] = $primary_table . '.' . $field . ' = ' . db_type_placeholder($schema['fields'][$field]['type']);
+  if (is_array($service_parameters)) {
+    foreach ($service_parameters as $field => $value) {
+      if (strstr($value, ',')) {
+        $in_placeholders = array();
+        foreach (explode(',', $value) as $thingy_value) {
+          $in_placeholders[] = db_type_placeholder($schema['fields'][$field]['type']);
+          $query_parameters[] = $thingy_value;
+        }
+        $where[] = $primary_table . '.' . $field . ' IN (' . implode(',', $in_placeholders) . ')';
+      }
+      else {
+        $where[] = $primary_table . '.' . $field . ' = ' . db_type_placeholder($schema['fields'][$field]['type']);
+        $query_parameters[] = $value;
+      }
     }
   }