- Refractored Date/time fields

- Added an implode function on EntityCollection

src/Entity/Field/Date.php

@@ -4,10 +4,7 @@ namespace Ulmus\Entity\Field;
 
 class Date extends Datetime {
     
-    public function __toString()
+    public string $format = "Y-m-d";
-    {
-        return $this->format("Y-m-d");
-    }
     
     public function formatLocale(string $format) : string
     {

src/Entity/Field/Time.php

@@ -4,9 +4,6 @@ namespace Ulmus\Entity\Field;
 
 class Time extends Datetime {
     
-    public function __toString()
+    public string $format = "H:i:s";
-    {
-        return $this->format("H:i:s");
-    }
     
 }

src/EntityCollection.php

@@ -107,4 +107,15 @@ class EntityCollection extends \ArrayObject {
         
         return $list;
     }
+    
+    public function implode(string $glue, ? Callable $callback = null) : string 
+    {
+        $values = [];
+        
+        foreach($this as $item) {
+            $values[] = $callback ? $callback($item) : (string) $item;
+        }
+        
+        return implode($glue, $values);
+    }
 }

src/EntityTrait.php

@@ -110,6 +110,10 @@ trait EntityTrait {
                         $bridgeRelation = $bridgeEntity->searchFieldAnnotation($relation->field, new Relation() );
                         $relationRelation = $bridgeEntity->searchFieldAnnotation($relation->foreignField, new Relation() );
 
+                        if ($relationRelation === null) {
+                            throw new \Exception("@Relation annotation not found for field `{$relation->foreignField}` in entity {$relation->bridge}");
+                        }
+                        
                         $repository = $relationRelation->entity()->repository();
 
                         $bridgeAlias = uniqid("bridge_");