Refactor and add docs

Author: SOHELAHMED7

src/lib/AttributeResolver.php

@@ -38,7 +38,7 @@ class AttributeResolver
     public array $relations = [];
 
     /**
-     * @var AttributeRelation[]|array
+     * @var array keys contains class names and value contains array of belongs to relations
      */
     public array $belongsToRelations = [];
 

src/lib/SchemaToDatabase.php

@@ -113,10 +113,8 @@ public function prepareModels(): array
         // handle belongs to relation
         foreach ($resolvers as $aResolver) {
             foreach ($aResolver->belongsToRelations as $name => $relations) {
-                foreach ($relations as $relation) {
-                    /** @var AttributeRelation $relation */
-                    $models[$name]->belongsToRelations[] = $relation;
-                }
+                /** @var AttributeRelation[] $relations */
+                $models[$name]->belongsToRelations = [...$models[$name]->belongsToRelations, ...$relations];
             }
         }
 

src/lib/items/DbModel.php

@@ -86,7 +86,7 @@ class DbModel extends BaseObject
     public bool $descriptionIsComment = false;
 
     /**
-     * @var array|AttributeRelation[] belongs to relations
+     * @var AttributeRelation[] belongs to relations
      */
     public array $belongsToRelations = [];