fix: GraphQL file upload fails in case of use of pointer or relation

spec/ParseGraphQLServer.spec.js

@@ -6832,7 +6832,7 @@ describe('ParseGraphQLServer', () => {
 
       describe('Files Mutations', () => {
         describe('Create', () => {
-          it_only_node_version('<17')('should return File object', async () => {
+          it('should return File object', async () => {
             const clientMutationId = uuidv4();
 
             parseServer = await global.reconfigureServer({
@@ -9298,7 +9298,7 @@ describe('ParseGraphQLServer', () => {
           expect(result6[0].node.name).toEqual('imACountry3');
         });
 
-        it_only_node_version('<17')('should support files', async () => {
+        it('should support files', async () => {
           try {
             parseServer = await global.reconfigureServer({
               publicServerURL: 'http://localhost:13377/parse',
@@ -9546,7 +9546,115 @@ describe('ParseGraphQLServer', () => {
           }
         });
 
-        it_only_node_version('<17')('should not upload if file is too large', async () => {
+        it('should support file upload for on fly creation through pointer and relation', async () => {
+          parseServer = await global.reconfigureServer({
+            publicServerURL: 'http://localhost:13377/parse',
+          });
+          const schema = new Parse.Schema('SomeClass');
+          schema.addFile('someFileField');
+          schema.addPointer('somePointerField', 'SomeClass');
+          schema.addRelation('someRelationField', 'SomeClass');
+          await schema.save();
+
+          const body = new FormData();
+          body.append(
+            'operations',
+            JSON.stringify({
+              query: `
+                mutation UploadFiles(
+                  $fields: CreateSomeClassFieldsInput
+                ) {
+                  createSomeClass(
+                    input: { fields: $fields }
+                  ) {
+                    someClass {
+                      id
+                      someFileField {
+                        name
+                        url
+                      }
+                      somePointerField {
+                        id
+                        someFileField {
+                          name
+                          url
+                        }
+                      }
+                      someRelationField {
+                        edges {
+                          node {
+                            id
+                            someFileField {
+                              name
+                              url
+                            }
+                          }
+                        }
+                      }
+                    }
+                  }
+                }
+                `,
+              variables: {
+                fields: {
+                  someFileField: { upload: null },
+                  somePointerField: {
+                    createAndLink: {
+                      someFileField: { upload: null },
+                    },
+                  },
+                  someRelationField: {
+                    createAndAdd: [
+                      {
+                        someFileField: { upload: null },
+                      },
+                    ],
+                  },
+                },
+              },
+            })
+          );
+          body.append(
+            'map',
+            JSON.stringify({
+              1: ['variables.fields.someFileField.upload'],
+              2: ['variables.fields.somePointerField.createAndLink.someFileField.upload'],
+              3: ['variables.fields.someRelationField.createAndAdd.0.someFileField.upload'],
+            })
+          );
+          body.append('1', 'My File Content someFileField', {
+            filename: 'someFileField.txt',
+            contentType: 'text/plain',
+          });
+          body.append('2', 'My File Content somePointerField', {
+            filename: 'somePointerField.txt',
+            contentType: 'text/plain',
+          });
+          body.append('3', 'My File Content someRelationField', {
+            filename: 'someRelationField.txt',
+            contentType: 'text/plain',
+          });
+
+          const res = await fetch('http://localhost:13377/graphql', {
+            method: 'POST',
+            headers,
+            body,
+          });
+          expect(res.status).toEqual(200);
+          const result = await res.json();
+          console.log(result);
+          expect(result.data.createSomeClass.someClass.someFileField.name).toEqual(
+            jasmine.stringMatching(/_someFileField.txt$/)
+          );
+          expect(result.data.createSomeClass.someClass.somePointerField.someFileField.name).toEqual(
+            jasmine.stringMatching(/_somePointerField.txt$/)
+          );
+          expect(
+            result.data.createSomeClass.someClass.someRelationField.edges[0].node.someFileField.name
+          ).toEqual(jasmine.stringMatching(/_someRelationField.txt$/));
+        });
+
+        it('should not upload if file is too large', async () => {
           parseGraphQLServer.parseServer.config.maxUploadSize = '1kb';
 
           const body = new FormData();

src/GraphQL/loaders/parseClassMutations.js

@@ -82,6 +82,7 @@ const load = function (parseGraphQLSchema, parseClass, parseClassConfig: ?ParseG
           const parseFields = await transformTypes('create', fields, {
             className,
             parseGraphQLSchema,
+            originalFields: args.fields,
             req: { config, auth, info },
           });
 
@@ -190,6 +191,7 @@ const load = function (parseGraphQLSchema, parseClass, parseClassConfig: ?ParseG
           const parseFields = await transformTypes('update', fields, {
             className,
             parseGraphQLSchema,
+            originalFields: args.fields,
             req: { config, auth, info },
           });
 

src/GraphQL/loaders/usersMutations.js

@@ -38,6 +38,7 @@ const load = parseGraphQLSchema => {
         const parseFields = await transformTypes('create', fields, {
           className: '_User',
           parseGraphQLSchema,
+          originalFields: args.fields,
           req: { config, auth, info },
         });
 
@@ -114,6 +115,7 @@ const load = parseGraphQLSchema => {
         const parseFields = await transformTypes('create', fields, {
           className: '_User',
           parseGraphQLSchema,
+          originalFields: args.fields,
           req: { config, auth, info },
         });
 

src/GraphQL/transformers/mutation.js

@@ -7,7 +7,7 @@ import * as objectsMutations from '../helpers/objectsMutations';
 const transformTypes = async (
   inputType: 'create' | 'update',
   fields,
-  { className, parseGraphQLSchema, req }
+  { className, parseGraphQLSchema, req, originalFields }
 ) => {
   const {
     classGraphQLCreateType,
@@ -44,13 +44,16 @@ const transformTypes = async (
             fields[field] = transformers.polygon(fields[field]);
             break;
           case inputTypeField.type === defaultGraphQLTypes.FILE_INPUT:
-            fields[field] = await transformers.file(fields[field], req);
+            // Use `originalFields` to handle file upload since fields are a deepcopy and do not
+            // keep the file object
+            fields[field] = await transformers.file(originalFields[field], req);
             break;
           case parseClass.fields[field].type === 'Relation':
             fields[field] = await transformers.relation(
               parseClass.fields[field].targetClass,
               field,
               fields[field],
+              originalFields[field],
               parseGraphQLSchema,
               req
             );
@@ -64,6 +67,7 @@ const transformTypes = async (
               parseClass.fields[field].targetClass,
               field,
               fields[field],
+              originalFields[field],
               parseGraphQLSchema,
               req
             );
@@ -135,7 +139,14 @@ const transformers = {
     }
     return parseACL;
   },
-  relation: async (targetClass, field, value, parseGraphQLSchema, { config, auth, info }) => {
+  relation: async (
+    targetClass,
+    field,
+    value,
+    originalValue,
+    parseGraphQLSchema,
+    { config, auth, info }
+  ) => {
     if (Object.keys(value).length === 0)
       throw new Parse.Error(
         Parse.Error.INVALID_POINTER,
@@ -151,9 +162,10 @@ const transformers = {
     if (value.createAndAdd) {
       nestedObjectsToAdd = (
         await Promise.all(
-          value.createAndAdd.map(async input => {
+          value.createAndAdd.map(async (input, i) => {
             const parseFields = await transformTypes('create', input, {
               className: targetClass,
+              originalFields: originalValue.createAndAdd[i],
               parseGraphQLSchema,
               req: { config, auth, info },
             });
@@ -204,7 +216,14 @@ const transformers = {
     }
     return op;
   },
-  pointer: async (targetClass, field, value, parseGraphQLSchema, { config, auth, info }) => {
+  pointer: async (
+    targetClass,
+    field,
+    value,
+    originalValue,
+    parseGraphQLSchema,
+    { config, auth, info }
+  ) => {
     if (Object.keys(value).length > 1 || Object.keys(value).length === 0)
       throw new Parse.Error(
         Parse.Error.INVALID_POINTER,
@@ -216,6 +235,7 @@ const transformers = {
       const parseFields = await transformTypes('create', value.createAndLink, {
         className: targetClass,
         parseGraphQLSchema,
+        originalFields: originalValue.createAndLink,
         req: { config, auth, info },
       });
       nestedObjectToAdd = await objectsMutations.createObject(