fixed lost fk data

Author: toramanlis

src/Blueprint/BlueprintDiff.php

@@ -42,7 +42,14 @@ public function applyColumnIndexes(bool $reverse = false)
         }
 
         foreach ($this->getAddedIndexes($reverse) as $index) {
-            $blueprint->{$index->name}($index->columns, $index->index, $index->algorithm);
+            $addedIndex = $blueprint->{$index->name}($index->columns, $index->index, $index->algorithm);
+            if ($index->on) {
+                $addedIndex->on($index->on);
+            }
+
+            if ($index->references) {
+                $addedIndex->references($index->references);
+            }
         }
 
         foreach ($this->getRenamedIndexes($reverse) as $from => $to) {
@@ -191,7 +198,7 @@ public function extractForeignKey(string $on, string $reference): Fluent
             if (
                 IndexType::Foreign->value !== $index->name ||
                 $index->on !== $on ||
-                !in_array($reference, $index->references)
+                !in_array($reference, $references)
             ) {
                 continue;
             }