My problem sorry!

[Javadebi]

Hi Ben.
I hope you are ok in these days.
i have a tiny problem with my school project. I want to make a user , post, comment with Graphql ,Express and Mongoose(Mongodb). I have wrote some code but i don't know why its not working. Can you please do me a favor and help me?

I can create user but when i want to create a post related to the user i get this error in playground:

ID cannot represent value: <Buffer 5e 9b f1 3e e9 49 61 38 fc 1a 6f 59>

these are my codes:

TypeDefs:

import { gql } from 'apollo-server-express';

export const typeDefs = gql`

    type Query {
        users: [User]
        posts: [Post]
    }

    type Mutation {
        createUser(name: String,email: String, age: Int): User!
        createPost(title: String, body: String, published: Boolean, author: ID): Post!
    }

    type User {
        id: ID!
        name: String!
        email: String!
        age: Int
        posts: [Post!]!
        comments: [Comment!]!
    }

    type Post {
        id: ID!
        title: String!
        body: String!
        published: Boolean!
        author: User!
        comments: [Comment!]!
    }

    type Comment {
        id: ID!
        text: String!
        author: User!
        post: Post!
    }
`

Resolvers:

import Users from './models/User';
import Posts from './models/Post';
import Comments from './models/Comment';


export const resolvers = {
    Query: {
        users: () => {
            return Users.find();
        },
        posts: () => {
            return Posts.find();
        }
    },
    Mutation: {
        createUser: async (parent, args, context, info) => {
            const user = new Users(args);
            await user.save();

            return user;
        },
        createPost: async (parent, { title, body, published, author }, context, info) => {
            const user = await Users.findById(author);

            if (!user) {
                console.log("User not found")
            }
            console.log(user)

            const post = new Posts({ title, body, published, author: user.id });
            await post.save();

            user.posts.push(post);
            await user.save();

            return post;
        }
    }
}

UserSchema:

import mongoose, { mongo } from 'mongoose';

const userSchema = new mongoose.Schema({
    name: {
        type: String,
        required: true
    },
    email: {
        type: String,
        required: true
    },
    age: {
        type: Number,
        required: false
    },
    posts: [
        {
            type: mongoose.Schema.Types.ObjectId,
            ref: 'Post'
        }
    ],
    comments: [
        {
            type: mongoose.Schema.Types.ObjectId,
            ref: 'Comment'
        }
    ]
});

module.exports = mongoose.model('User',userSchema);

PostSchema:

import mongoose from 'mongoose';

const postSchema = new mongoose.Schema({
    title: {
        type: String,
        required: true
    },
    body: {
        type: String,
        required: true
    },
    published: {
        type: Boolean,
        required: true
    },
    author: {
        type: mongoose.Schema.Types.ObjectId,
        ref: 'User'
    },
    comments: [
        {
            type: mongoose.Schema.Types.ObjectId,
            ref: 'Comment'
        }
    ]
});

module.exports = mongoose.model('Post',postSchema);

CommentSchema:

import mongoose from 'mongoose';

const commentSchema = new mongoose.Schema({
    text: {
        type: String,
        required: true
    },
    author: {
        type: mongoose.Schema.Types.ObjectId,
        ref: 'User'
    },
    post: {
        type: mongoose.Schema.Types.ObjectId,
        ref: 'Post'
    }
});

module.exports = mongoose.model('Comment',commentSchema);

[Javadebi]

Sorry Ben i didn't know any other way to get your help

[benawad]

I'm guessing you need to convert the id to a string