added test to query node type w/o id attribute

tests/Queries/QueryTest.php

@@ -6,6 +6,7 @@
 use Nuwave\Lighthouse\Support\Definition\GraphQLQuery;
 use Nuwave\Lighthouse\Tests\Support\Models\User;
 use Nuwave\Lighthouse\Tests\Support\GraphQL\Types\UserType;
+use Nuwave\Lighthouse\Tests\Support\GraphQL\Types\PostType;
 use Nuwave\Lighthouse\Tests\Support\GraphQL\Types\TaskType;
 use Nuwave\Lighthouse\Tests\Support\GraphQL\Queries\UserQuery;
 use Nuwave\Lighthouse\Tests\TestCase;
@@ -75,6 +76,7 @@ public function itCanExecuteConnectionQuery()
     public function itCanResolveNodeInterface()
     {
         $id = $this->encodeGlobalId(UserType::class, 1);
+
         $query = '{
             node(id:"'.$id.'") {
                 id
@@ -99,4 +101,35 @@ public function itCanResolveNodeInterface()
         $data = $this->executeQuery($query)['data'];
         $this->assertEquals($expected, $data);
     }
+
+    /**
+     * @test
+     * @group failing
+     */
+    public function itCanResolveNodeWithoutRegularIdAttribute()
+    {
+        $id = $this->encodeGlobalId(PostType::class, 1);
+
+        $query = '{
+            node(id:"'.$id.'") {
+                id
+                ... on Post {
+                    title
+                }
+            }
+        }';
+
+        $expected = [
+            'node' => [
+                'id' => $id,
+                'title' => 'Foobar',
+            ],
+        ];
+
+        $graphql = app('graphql');
+        $graphql->schema()->type('post', PostType::class);
+
+        $data = $this->executeQuery($query)['data'];
+        $this->assertEquals($expected, $data);
+    }
 }

tests/Support/Database/Factories/ModelFactory.php

@@ -16,3 +16,10 @@
         'completed' => 'false'
     ];
 });
+
+$factory->define($namespace.'Post', function (Faker\Generator $faker) {
+    return [
+        'title' => $faker->sentence,
+        'content' => $faker->paragraph
+    ];
+});

tests/Support/GraphQL/Types/PostType.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace Nuwave\Lighthouse\Tests\Support\GraphQL\Types;
+
+use GraphQL;
+use GraphQL\Type\Definition\Type;
+use Nuwave\Lighthouse\Support\Definition\GraphQLType;
+use Nuwave\Lighthouse\Support\Interfaces\RelayType;
+use Nuwave\Lighthouse\Tests\Support\Models\Post;
+
+class PostType extends GraphQLType implements RelayType
+{
+    /**
+     * Attributes of type.
+     *
+     * @var array
+     */
+    protected $attributes = [
+        'name' => 'Post',
+        'description' => 'A post that does not have a regular id field.'
+    ];
+
+    /**
+     * Get model by id.
+     *
+     * Note: When the root 'node' query is called, this method
+     * will be used to resolve the type by providing the id.
+     *
+     * @param  mixed $id
+     * @return mixed
+     */
+    public function resolveById($id)
+    {
+        return factory(Post::class)->make([
+            'post_id' => $id,
+            'title' => 'Foobar',
+        ]);
+    }
+
+    /**
+     * Type fields.
+     *
+     * @return array
+     */
+    public function fields()
+    {
+        return [
+            'title' => [
+                'type' => Type::string(),
+                'description' => 'Title of the post.'
+            ],
+            'content' => [
+                'type' => Type::string(),
+                'description' => 'Content of the post.'
+            ],
+            'user_id' => [
+                'type' => Type::int(),
+                'description' => 'ID of user who wrote the post.'
+            ]
+        ];
+    }
+}

tests/Support/Models/Post.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Nuwave\Lighthouse\Tests\Support\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Nuwave\Lighthouse\Support\Traits\RelayModel;
+
+class Post extends Model
+{
+    use RelayModel;
+
+    /**
+     * The primary key for the model.
+     *
+     * @var string
+     */
+    protected $primaryKey = 'post_id';
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
+    protected $fillable = [
+        'title', 'content', 'user_id',
+    ];
+}