How should i connect Schema models in Mongoose? - express

Question

i want to make a User, Post and comment. connect them together and when i create a Post, it should be connected to one of my users. I don't know why i get an unusual error. Error:
ID cannot represent value: <Buffer 5e 9b f1 3e e9 49 61 38 fc 1a 6f 59>
these are all of my code so if you know whats my problem please help me fix it. Thanks
typeDefs:
import { gql } from 'apollo-server-express';
export const typeDefs = gql`
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!
}
`
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);
Resolver:
import Users from './models/User';
import Posts from './models/Post';
import Comments from './models/Comment';
export const resolvers = {
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;
}
}
}

Answer 1

I have found the solution and you should use type: mongoose.Schema.Types.ObjectId and ref: 'Comment' and after that inside resolvers you should use population .