Index added to migration

Author: davidwesdijk

database/migrations/2020_07_03_155026_create_polymorphic_entity_attribute_values_table.php

@@ -27,6 +27,8 @@ public function up()
             $table->unsignedInteger('entity_attribute_id');
             $table->string('value')->nullable();
             $table->timestamps();
+
+            $table->index(['attributable_id', 'attributable_type']);
         });
     }