Added scopes to trait

src/Scopes/EntityAttributeValueScopes.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace DavidWesdijk\LaravelPolymorphicEav\Scopes;
+
+use DavidWesdijk\LaravelPolymorphicEav\EntityAttribute;
+use Illuminate\Database\Eloquent\Builder;
+
+/**
+ * Trait EntityAttributeValueScopes
+ * @package DavidWesdijk\LaravelPolymorphicEav\Scopes
+ *
+ * @method static hasAttribute(EntityAttribute|int $attribute) Get instances with a given attribute
+ */
+trait EntityAttributeValueScopes
+{
+    /**
+     * Get instances with a given attribute
+     *
+     * @param Builder $query
+     * @param $attribute
+     *
+     * @return Builder
+     */
+    public function scopeHasAttribute(Builder $query, $attribute): Builder
+    {
+        $attributeId = ($attribute instanceof EntityAttribute) ? $attribute->id : $attribute;
+
+        return $query->whereHas(static::$relationName, function (Builder $query) use ($attributeId) {
+            $query->where('entity_attribute_id', $attributeId);
+        });
+    }
+}

src/Traits/HasEntityAttributeValues.php

@@ -4,9 +4,16 @@
 
 use DavidWesdijk\LaravelPolymorphicEav\EntityAttributeValue;
 use DavidWesdijk\LaravelPolymorphicEav\Resolvers\GroupResolver;
+use DavidWesdijk\LaravelPolymorphicEav\Scopes\EntityAttributeValueScopes;
 
+/**
+ * Trait HasEntityAttributeValues
+ * @package DavidWesdijk\LaravelPolymorphicEav\Traits
+ */
 trait HasEntityAttributeValues
 {
+    use EntityAttributeValueScopes;
+
     /**
      * @var string
      */