Use custom resolver

- add postId to type Comment
- remove it from params to create node without postId
- fix tests

Co-authored-by: Robert Schäfer <roschaefer@users.noreply.github.com>
Co-Authored-By: Tirokk <wolle.huss@pjannto.com>
Co-Authored-By: Mike Aono <aonomike@gmail.com>

backend/src/resolvers/comments.js

@@ -2,11 +2,24 @@ import { neo4jgraphql } from 'neo4j-graphql-js'
 
 export default {
   Mutation: {
-    CreateComment: (object, params, context, resolveInfo) => {
-      return neo4jgraphql(object, params, context, resolveInfo, false)
-    },
-    AddPostComments: (object, params, context, resolveInfo) => {
-      return neo4jgraphql(object, params, context, resolveInfo, false)
+    CreateComment: async (object, params, context, resolveInfo) => {
+      const { postId } = params
+      delete params.postId
+      const comment = await neo4jgraphql(object, params, context, resolveInfo, true)
+      
+      const session = context.driver.session()
+
+      const transactionRes = await session.run(`
+          MATCH (post:Post {id: $postId}), (comment:Comment {id: $commentId})
+          MERGE (post)<-[:COMMENTS]-(comment)
+          RETURN comment {.id, .content}`, {
+          postId,
+          commentId: comment.id
+        }
+      )
+      session.close()  
+      
+      return comment
     }
   }
 }

backend/src/resolvers/comments.spec.js

@@ -19,8 +19,8 @@ afterEach(async () => {
 
 describe('CreateComment', () => {
   const mutation = `
-    mutation($id: ID!, $content: String!) {
-      CreateComment(id: $id, content: $content) {
+    mutation($postId: ID, $content: String!) {
+      CreateComment(postId: $postId, content: $content) {
         id
         content
       }
@@ -29,7 +29,7 @@ describe('CreateComment', () => {
   describe('unauthenticated', () => {
     it('throws authorization error', async () => {
       variables = {
-        id: 'c1',
+        postId: 'p1',
         content: 'I\'m not authorised to comment'
       }
       client = new GraphQLClient(host)
@@ -46,12 +46,11 @@ describe('CreateComment', () => {
 
     it('creates a post', async () => {
       variables = {
-        id: 'c1',
+        postId: 'p1',
         content: 'I\'m authorised to comment'
       }
       const expected = {
         CreateComment: {
-          id: 'c1',
           content: 'I\'m authorised to comment'
         }
       }

backend/src/schema.graphql

@@ -210,6 +210,7 @@ type Post {
 type Comment {
   id: ID!
   activityId: String
+  postId: ID
   author: User @relation(name: "WROTE", direction: "IN")
   content: String!
   contentExcerpt: String