Merge schema's instead of overwriting (#218)

* Update GraphQL.php

* add Merge schema test

* Test implemented incorrectly

Author: MrGekko

src/Rebing/GraphQL/GraphQL.php

@@ -210,8 +210,18 @@ protected function buildObjectTypeFromFields($fields, $opts = [])
     }
 
     public function addSchema($name, $schema)
+    {        
+        $this->mergeSchemas($name, $schema);
+    }    
+    
+    public function mergeSchemas($name, $schema)
     {
-        $this->schemas[$name] = $schema;
+        if (isset($this->schemas[$name]) && $this->schemas[$name]) {
+            $this->schemas[$name] = array_merge_recursive($this->schemas[$name], $schema);
+        }
+        else {
+            $this->schemas[$name] = $schema;
+        }
     }
 
     public function clearType($name)

tests/GraphQLTest.php

@@ -270,6 +270,41 @@ public function testGetTypes()
     public function testAddSchema()
     {
         GraphQL::addSchema('custom_add', [
+            'query'    => [
+                'examplesCustom' => ExamplesQuery::class
+            ],
+            'mutation' => [
+                'updateExampleCustom' => UpdateExampleMutation::class
+            ],
+            'types'    => [
+                CustomExampleType::class
+            ]
+        ]);
+
+        $schemas = GraphQL::getSchemas();
+        $this->assertArrayHasKey('custom_add', $schemas);
+    }
+
+    /**
+     * Test merge schema
+     *
+     * @test
+     */
+    public function testMergeSchema()
+    {
+        GraphQL::addSchema('custom_add', [
+            'query'    => [
+                'examplesCustom' => ExamplesQuery::class
+            ],
+            'mutation' => [
+                'updateExampleCustom' => UpdateExampleMutation::class
+            ],
+            'types'    => [
+                CustomExampleType::class
+            ]
+        ]);
+
+        GraphQL::addSchema('custom_add_another', [
             'query' => [
                 'examplesCustom' => ExamplesQuery::class
             ],
@@ -283,6 +318,20 @@ public function testAddSchema()
 
         $schemas = GraphQL::getSchemas();
         $this->assertArrayHasKey('custom_add', $schemas);
+        $this->assertArrayHasKey('custom_add_another', $schemas);
+
+        GraphQL::addSchema('custom_add_another', [
+            'query' => [
+                'examplesCustomAnother' => ExamplesQuery::class
+            ]
+        ]);
+
+        $schemas = GraphQL::getSchemas();
+        $this->assertArrayHasKey('custom_add_another', $schemas);
+
+        $querys = $schemas['custom_add_another']['query'];
+        $this->assertArrayHasKey('examplesCustom', $querys);
+        $this->assertArrayHasKey('examplesCustomAnother', $querys);
     }
 
     /**