update posts with post type parameter

backend/src/schema/resolvers/posts.js

@@ -184,7 +184,16 @@ export default {
         `
       }
 
-      updatePostCypher += `RETURN post {.*}`
+      if (params.postType) {
+        updatePostCypher += `
+          REMOVE post:Article
+          REMOVE post:Event
+          SET post:${params.postType}
+          WITH post
+        `
+      }
+
+      updatePostCypher += `RETURN post {.*, postType: filter(l IN labels(post) WHERE NOT l = "Post")}`
       const updatePostVariables = { categoryIds, params }
       try {
         const writeTxResultPromise = session.writeTransaction(async (transaction) => {

backend/src/schema/resolvers/posts.spec.js

@@ -354,6 +354,7 @@ describe('UpdatePost', () => {
       $content: String!
       $image: ImageInput
       $categoryIds: [ID]
+      $postType: PostType
     ) {
       UpdatePost(
         id: $id
@@ -361,6 +362,7 @@ describe('UpdatePost', () => {
         content: $content
         image: $image
         categoryIds: $categoryIds
+        postType: $postType
       ) {
         id
         title
@@ -374,6 +376,7 @@ describe('UpdatePost', () => {
         categories {
           id
         }
+        postType
       }
     }
   `
@@ -495,6 +498,22 @@ describe('UpdatePost', () => {
       })
     })
 
+    describe('post type', () => {
+      it.only('changes the post type', async () => {
+        await expect(
+          mutate({ mutation: updatePostMutation, variables: { ...variables, postType: 'Event' } }),
+        ).resolves.toMatchObject({
+          data: {
+            UpdatePost: {
+              id: newlyCreatedPost.id,
+              postType: ['Event'],
+            },
+          },
+          errors: undefined,
+        })
+      })
+    })
+
     describe.skip('params.image', () => {
       describe('is object', () => {
         beforeEach(() => {