From 73f3673a117691b5b55efaf81dc168137ceaed95 Mon Sep 17 00:00:00 2001
From: Taras Machyshyn <taras@letrium.com>
Date: Fri, 27 Feb 2015 12:27:37 +0200
Subject: [PATCH] Improved unique indexes for relationship tables

---
 .../Core/Utils/Database/Schema/Converter.php  | 26 ++++++++++++-------
 1 file changed, 16 insertions(+), 10 deletions(-)

diff --git a/application/Espo/Core/Utils/Database/Schema/Converter.php b/application/Espo/Core/Utils/Database/Schema/Converter.php
index 7da2a448d6..36d583734e 100644
--- a/application/Espo/Core/Utils/Database/Schema/Converter.php
+++ b/application/Espo/Core/Utils/Database/Schema/Converter.php
@@ -244,20 +244,16 @@ class Converter
         $uniqueIndex = array();
         foreach($relationParams['midKeys'] as $index => $midKey) {
 
-            $usMidKey = Util::toUnderScore($midKey);
-            $table->addColumn($usMidKey, $this->idParams['dbType'], array('length'=>$this->idParams['len']));
-            $table->addIndex(array($usMidKey));
+            $columnName = Util::toUnderScore($midKey);
+            $table->addColumn($columnName, $this->idParams['dbType'], array('length'=>$this->idParams['len']));
+            $table->addIndex(array($columnName));
 
-            $uniqueIndex[] = $usMidKey;
-        }
-
-        if (!empty($uniqueIndex)) {
-            $table->addUniqueIndex($uniqueIndex);
+            $uniqueIndex[] = $columnName;
         }
         //END: add midKeys to a schema
 
         //add additionalColumns
-        if (isset($relationParams['additionalColumns'])) {
+        if (!empty($relationParams['additionalColumns'])) {
             foreach($relationParams['additionalColumns'] as $fieldName => $fieldParams) {
 
                 if (!isset($fieldParams['type'])) {
@@ -271,6 +267,17 @@ class Converter
             }
         } //END: add additionalColumns
 
+        //add unique indexes
+        if (!empty($relationParams['conditions'])) {
+            foreach ($relationParams['conditions'] as $fieldName => $fieldParams) {
+                $uniqueIndex[] = Util::toUnderScore($fieldName);
+            }
+        }
+
+        if (!empty($uniqueIndex)) {
+            $table->addUniqueIndex($uniqueIndex);
+        }
+        //END: add unique indexes
 
         $table->addColumn('deleted', 'bool', array('default' => 0));
         $table->setPrimaryKey(array("id"));
@@ -278,7 +285,6 @@ class Converter
         return $table;
     }
 
-
     protected function getDbFieldParams($fieldParams)
     {
         $dbFieldParams = array();