sequelize associations foreignKey - postgresql

Question

I want INNER JOIN with sequelize db: postgress
I have 2 database(users and posts)
Users
import Sequelize from "sequelize";
import { sequelize } from "../databases/database";
import Post from "./Post";
const User = sequelize.define(
"user",
{
id: {
type: Sequelize.INTEGER,
autoIncrement: true,
primaryKey: true
},
username: {
type: Sequelize.STRING,
},
password: {
type: Sequelize.STRING
},
image: {
type: Sequelize.STRING
}
},
{ timestamps: false }
);
User.hasMany(Post, { foreignKey: "author", sourceKey: "username" });
Post.belongsTo(User, { foreignKey: "author", sourceKey: "username" });
export default User;
Posts
import Sequelize from "sequelize";
import { sequelize } from "../databases/database";
const Post = sequelize.define("post", {
id: {
type: Sequelize.INTEGER,
primaryKey: true
},
title: {
type: Sequelize.TEXT
},
content: {
type: Sequelize.TEXT
},
image: {
type: Sequelize.STRING
},
description: {
type: Sequelize.TEXT
},
tags: {
type: Sequelize.STRING
},
author: {
type: Sequelize.STRING
},
createdAt: {
field: 'createdat',
type: Sequelize.DATE
},
updatedAt: {
field: 'updatedat',
type: Sequelize.DATE
}
});
export default Post;
Controller
export const listAllPosts = async params => {
const { offset } = params;
try {
const allPosts = await Post.findAll({
// limit: 20,
// offset: offset ? offset * 20 : 0,
// order: [["id", "DESC"]],
attributes: ["title", "content","tags","description","createdAt","updatedAt"],
required: true,
include:[
{
model:User,
attributes: ["username", "image"],
required:true,
}
]
});
return allPosts;
} catch (error) {
throw error;
}
};
and when i collect api show error:
Executing (default): SELECT "post"."id", "post"."title",
"post"."content", "post"."tags", "post"."description",
"post"."createdat"AS "createdAt", "post"."updatedat" AS "updatedAt",
"user"."id" AS "user.id", "user"."username" AS "user.username",
"user"."image" AS "user.image" FROM "posts" AS "post" INNER JOIN
"users" AS "user" ON "post"."author" = "user"."id";
error: SequelizeDatabaseError: operator does not exist: text = integer
But i want show exact and i dont want change primaryKey:
SELECT "post"."title", "post"."content", "post"."tags", "post"."description", "post"."createdat"AS "createdAt", "post"."updatedat" AS "updatedAt", "user"."username" AS "user.username", "user"."image" AS "user.image" FROM "posts" AS "post" INNER JOIN "users" AS "user" ON "post"."author" = "user"."username";
How i can do that?

Answer 1

You should better use 'userId' then 'author'. It'll fix your problem.
And edit association
User.hasMany(Post, { foreignKey: "userId", sourceKey: "id" });
Post.belongsTo(User, { foreignKey: "id", sourceKey: "userId" });
And advice you to read
https://www.essentialsql.com/get-ready-to-learn-sql-database-normalization-explained-in-simple-english/