Fix tests for virtual reference with nested fields

All passing.

Author: natac13

src/resolvers/helpers/__tests__/projection-test.ts

@@ -28,7 +28,7 @@ describe('Resolver helper `projection` ->', () => {
     it('should make projection fields flat', () => {
       resolveParams.projection = { name: { first: 1, last: 1 } };
       projectionHelper(resolveParams, { name: 'n' });
-      expect(spyFn).toBeCalledWith({ n: true });
+      expect(spyFn).toBeCalledWith({ 'n.first': true, 'n.last': true });
     });
 
     it('should not call query.select if projection has * key', () => {

src/resolvers/helpers/dotify.ts

@@ -1,5 +1,5 @@
 const dotify = (object: Record<string, any>) => {
-  const res: Record<string, number> = {};
+  const res: Record<string, boolean> = {};
 
   function recurse(obj: Record<string, any>, current?: string) {
     const objKeys = Object.keys(obj);
@@ -10,11 +10,11 @@ const dotify = (object: Record<string, any>) => {
       const newKey = current ? `${current}.${key}` : key;
       if (value && (value.$meta || value.$slice || value.$elemMatch)) {
         // pass MongoDB projection operators https://docs.mongodb.com/v3.2/reference/operator/projection/meta/
-        res[newKey] = 1;
+        res[newKey] = value;
       } else if (value && typeof value === 'object' && Object.keys(value).length > 0) {
         recurse(value, newKey);
       } else {
-        res[newKey] = 1;
+        res[newKey] = !!value;
       }
     });
   }

src/resolvers/helpers/projection.ts

@@ -16,8 +16,15 @@ export function projectionHelper(
 
     if (aliases) {
       Object.keys(flatProjection).forEach((k) => {
-        if (aliases[k]) {
-          flatProjection[aliases[k]] = true;
+        const keys = k.split('.');
+        const parentKey = keys[0];
+        if (aliases[parentKey]) {
+          const otherKeys = keys.slice(1);
+          if (otherKeys.length === 0) {
+            flatProjection[aliases[parentKey]] = true;
+          } else {
+            flatProjection[aliases[parentKey] + '.' + otherKeys.join('.')] = true;
+          }
           delete flatProjection[k];
         }
       });