Refactor PivotProcessor: Replace composite primary key with auto-increment ID and preserve uniqueness via unique index

- Replaces composite primary keys (e.g. role_id + customer_id) with a single 'id' column (bigInteger, auto-increment)
- Converts the removed primary key columns into a unique index to retain logical constraints
- Ensures compatibility with Laravel's Eloquent model usage on pivot tables

Author: N3XT0R

src/Service/Generator/Compiler/Mapper/IndexMapper.php

@@ -47,7 +47,13 @@ protected function generateIndex(IndexEntity $index): string
             $method .= "'" . $columns[0] . "'";
         }
 
-        $method .= ", '" . $index->getName() . "')";
+        $name = trim($index->getName());
+        if ($name !== '') {
+            $method .= ", '" . $name . "'";
+        }
+
+        $method .= ')';
+
         $methods = [$method];
 
         return $this->chainMethodsToString($methods);

src/Service/Generator/MigrationGenerator.php

@@ -130,7 +130,6 @@ public function generateMigrationForTable(
 
             $normalizationManager = $this->getNormalizationManager();
             if ($normalizationManager) {
-                //dd($schemaResult);
                 $schemaResult = $normalizationManager->normalize($schemaResult);
             }
 

src/Service/Generator/Normalization/Processors/PivotProcessor.php

@@ -3,6 +3,7 @@
 namespace N3XT0R\MigrationGenerator\Service\Generator\Normalization\Processors;
 
 use N3XT0R\MigrationGenerator\Service\Generator\Definition\Entity\FieldEntity;
+use N3XT0R\MigrationGenerator\Service\Generator\Definition\Entity\IndexEntity;
 use N3XT0R\MigrationGenerator\Service\Generator\Definition\Entity\PrimaryKeyEntity;
 use N3XT0R\MigrationGenerator\Service\Generator\Definition\Entity\ResultEntity;
 use N3XT0R\MigrationGenerator\Service\Generator\Normalization\Context\NormalizationContext;
@@ -22,7 +23,8 @@ public function process(NormalizationContext $context): ResultEntity
 
         foreach ($results as $tableName => $definitions) {
             $primary = current($definitions['primaryKey']);
-            if ($primary instanceof PrimaryKeyEntity && count($primary->getColumns()) >= 2) {
+            $pkColumns = $primary->getColumns();
+            if ($primary instanceof PrimaryKeyEntity && count($pkColumns) >= 2) {
                 $idField = new FieldEntity();
                 $idField->setTable($tableName);
                 $idField->setType('bigInteger');
@@ -33,9 +35,15 @@ public function process(NormalizationContext $context): ResultEntity
                     'nullable' => false
                 ]);
 
+                $uniqueIndex = new IndexEntity();
+                $uniqueIndex->setType('unique');
+                $uniqueIndex->setColumns($pkColumns);
+
                 $idField->setColumnName('id');
                 $results[$tableName]['table'] = ['id' => $idField, ...$definitions['table']];
+                $results[$tableName]['index'] = [$uniqueIndex, ...$definitions['index']];
                 unset($results[$tableName]['primaryKey']);
+                //dump($results);
             }
         }