-

src/Eloquent/EmbedsRelations.php

@@ -15,9 +15,9 @@
 trait EmbedsRelations
 {
     /**
-     * @var array{class-string<self>, bool}
+     * @var array<class-string, array<string, bool>>
      */
-    private static array $embeddedCache = [];
+    private static array $hasEmbeddedRelation = [];
 
     /**
      * Define an embedded one-to-many relationship.
@@ -98,13 +98,13 @@ private function hasEmbeddedRelation(string $key): bool
             return false;
         }
 
-        if (isset(self::$embeddedCache[static::class][$key])) {
-            return self::$embeddedCache[static::class][$key];
+        if (isset(self::$hasEmbeddedRelation[static::class][$key])) {
+            return self::$hasEmbeddedRelation[static::class][$key];
         }
 
         $returnType = (new ReflectionMethod($this, $method))->getReturnType();
 
-        return self::$embeddedCache[static::class][$key] = $returnType instanceof ReflectionNamedType
+        return self::$hasEmbeddedRelation[static::class][$key] = $returnType instanceof ReflectionNamedType
             && in_array($returnType->getName(), [EmbedsOne::class, EmbedsMany::class], true);
     }
 }

src/Eloquent/HybridRelations.php

@@ -259,10 +259,6 @@ public function belongsToMany(
 
         $instance = new $related;
 
-        if ($otherKey === $relation) {
-            throw new \LogicException(sprintf('In %s::%s(), the key cannot be identical to the relation name "%s". The default key is "%s".', static::class, $relation, $relation, $instance->getForeignKey().'s'));
-        }
-
         $otherKey = $otherKey ?: $instance->getForeignKey().'s';
 
         // If no table name was provided, we can guess it by concatenating the two

tests/Models/Group.php

@@ -15,6 +15,6 @@ class Group extends Eloquent
 
     public function users(): BelongsToMany
     {
-        return $this->belongsToMany(User::class, 'users', 'groups', 'userIds', '_id', '_id', 'users');
+        return $this->belongsToMany(User::class, 'users', 'groupIds', 'userIds', '_id', '_id', 'users');
     }
 }

tests/Models/User.php

@@ -79,12 +79,7 @@ public function clients()
 
     public function groups()
     {
-        return $this->belongsToMany(Group::class, 'groups', 'users', 'groupIds', '_id', '_id', 'groups');
-    }
-
-    public function otherGroups()
-    {
-        return $this->belongsToMany(Group::class, 'groups', 'users', 'otherGroups', '_id', '_id', 'groups');
+        return $this->belongsToMany(Group::class, 'groups', 'userIds', 'groupIds', '_id', '_id', 'groups');
     }
 
     public function photos()