Unknown type "Link". Did you mean "Int"? after create type with prisma

[nebulahh]

hello, i am following the tutorial on https://the-guild.dev/graphql/yoga-server/tutorial/basic/07-connecting-server-and-database. but when i test the implementation, i get [ERROR] 19:48:22 Error: Unknown type "Link". Did you mean "Int"? in the console and graphiql return "message": "NetworkError when attempting to fetch resource."

This is my schema.ts

import { makeExecutableSchema } from "@graphql-tools/schema"
import type { GraphQLContext } from "./context";
import type { Link } from "@prisma/client";

const typeDefinations = `
  type Query {
    info: String!
    feed: [Link!]!
  }

  type Mutation {
    postLink(url: String!, description: String!): Link!
  }
`

const resolvers = {
  Query: {
    info: () => `This is the API of a Hackernews Clone`,
    feed: async () => (parent: unknown, args: {}, context: GraphQLContext) => {
    return context.prisma.link.findMany() 
    }
  },

  Link: {
    id: (parent: Link) => parent.id,
    description: (parent: Link) => parent.description,
    url: (parent: Link) => parent.url
  },

  Mutation: {
    async postLink(
      parent: unknown, 
      args: { description: string; url: string },
      context: GraphQLContext
      ) {
        const newLink = await context.prisma.link.create({
          data: {
            url: args.url,
            description: args.description
          }
        })

        return newLink
      }
  },
}

export const schema = makeExecutableSchema({
  resolvers: [resolvers],
  typeDefs: [typeDefinations]
})

[ardatan]

Link type is missing in your type definitions;
https://the-guild.dev/graphql/yoga-server/tutorial/basic/04-a-simple-query#extending-the-schema-definition

[nebulahh]

i did that earlier, but graphiql returned "message": "Expected Iterable, but did not find one for field \"Query.feed\"."