Correctly convert arguments with nested arrays

Author: dupski

src/__tests__/jsonToGraphQLQuery.tests.ts

@@ -93,6 +93,33 @@ describe('jsonToGraphQL()', () => {
 }`);
     });
 
+    it('converts a query with JSON arguments containing arrays of objects', () => {
+        const query = {
+            query: {
+                Posts: {
+                    __args: {
+                        or: [
+                            { published: true },
+                            { rating: [{ _gt: 3 }] }
+                        ],
+                        orderBy: 'post_date'
+                    },
+                    id: true,
+                    title: true,
+                    post_date: true
+                }
+            }
+        };
+        expect(jsonToGraphQLQuery(query, { pretty: true })).to.equal(
+`query {
+    Posts (or: [{published: true},{rating: [{_gt: 3}]}], orderBy: "post_date") {
+        id
+        title
+        post_date
+    }
+}`);
+    });
+
     it('converts a query with nested objects', () => {
         const query = {
             query: {

src/jsonToGraphQLQuery.ts

@@ -1,10 +1,13 @@
 
-function stringify(obj_from_json: any) {
+function stringify(obj_from_json: any): string {
     // Cheers to Derek: https://stackoverflow.com/questions/11233498/json-stringify-without-quotes-on-properties
-    if (typeof obj_from_json !== 'object' || Array.isArray(obj_from_json)) {
+    if (typeof obj_from_json !== 'object') {
         // not an object, stringify using native function
         return JSON.stringify(obj_from_json);
     }
+    else if (Array.isArray(obj_from_json)) {
+        return `[${obj_from_json.map((item) => stringify(item)).join(',')}]`;
+    }
     // Implements recursive object serialization according to JSON spec
     // but without quotes around the keys.
     const props: string = Object