fix: errors in GraphQL do not show the original error but a general Unexpected Error (#8045)

spec/ParseGraphQLServer.spec.js

@@ -10646,6 +10646,12 @@ describe('ParseGraphQLServer', () => {
                     },
                     resolve: (p, { message }) => message,
                   },
+                  errorQuery: {
+                    type: new GraphQLNonNull(GraphQLString),
+                    resolve: () => {
+                      throw new Error('A test error');
+                    },
+                  },
                   customQueryWithAutoTypeReturn: {
                     type: SomeClassType,
                     args: {
@@ -10734,6 +10740,18 @@ describe('ParseGraphQLServer', () => {
         expect(result.data.customQuery).toEqual('hello');
       });
 
+      it('can forward original error of a custom query', async () => {
+        await expectAsync(
+          apolloClient.query({
+            query: gql`
+              query ErrorQuery {
+                errorQuery
+              }
+            `,
+          })
+        ).toBeRejectedWithError('A test error');
+      });
+
       it('can resolve a custom query with auto type return', async () => {
         const obj = new Parse.Object('SomeClass');
         await obj.save({ name: 'aname', type: 'robot' });

src/GraphQL/ParseGraphQLServer.js

@@ -38,6 +38,7 @@ class ParseGraphQLServer {
           config,
           auth,
         }),
+        maskedErrors: false,
         multipart: {
           fileSize: this._transformMaxUploadSizeToBytes(
             this.parseServer.config.maxUploadSize || '20mb'