Ocelot-Social/backend/src/schema/resolvers/posts.js

import { neo4jgraphql } from 'neo4j-graphql-js'
import fileUpload from './fileUpload'

export default {
  Mutation: {
    UpdatePost: async (object, params, context, resolveInfo) => {
      params = await fileUpload(params, { file: 'imageUpload', url: 'image' })
      return neo4jgraphql(object, params, context, resolveInfo, false)
    },

    CreatePost: async (object, params, context, resolveInfo) => {
      const { categories } = params
      let post
      params = await fileUpload(params, { file: 'imageUpload', url: 'image' })
      post = await neo4jgraphql(object, params, context, resolveInfo, false)

      const session = context.driver.session()
      await session.run(
        'MATCH (author:User {id: $userId}), (post:Post {id: $postId}) ' +
          'MERGE (post)<-[:WROTE]-(author) ' +
          'RETURN author',
        {
          userId: context.user.id,
          postId: post.id,
        },
      )
      if (categories && categories.length) {
        await session.run(
          `MATCH (post:Post {id: $postId})
          UNWIND $categories AS categoryId
          MATCH (category:Category {id: categoryId})
          MERGE (post)-[:CATEGORIZED]->(category)
          RETURN category`,
          {
            categories,
            postId: post.id,
          },
        )
      }
      session.close()
      return post
    },
  },
}