👀 Views: 52 💬 Answers: 1 📅 Created: 2025-06-15

node.js sequelize postgresql JavaScript

I need help solving Quick question that's been bugging me - I'm experiencing a `TypeError: want to read properties of undefined` when trying to retrieve associated data with Sequelize in my Node.js application. I have a simple setup with two models, `User` and `Profile`, where a `User` has one `Profile`. The models are defined like this: ```javascript // User.js module.exports = (sequelize, DataTypes) => { const User = sequelize.define('User', { username: DataTypes.STRING, email: DataTypes.STRING }); User.associate = (models) => { User.hasOne(models.Profile); }; return User; }; // Profile.js module.exports = (sequelize, DataTypes) => { const Profile = sequelize.define('Profile', { bio: DataTypes.TEXT, avatar: DataTypes.STRING }); Profile.associate = (models) => { Profile.belongsTo(models.User); }; return Profile; }; ``` In my controller, I'm trying to fetch the user along with their profile: ```javascript const getUserWithProfile = async (userId) => { const user = await User.findByPk(userId, { include: Profile }); return user; }; ``` However, when I run this code, I get the behavior mentioned above. I've confirmed that the `userId` is valid and that there are corresponding entries in both tables. I've also tested fetching users without the profile, and that works fine. The Sequelize version I'm using is 6.3.5, and I'm using Node.js 14.15.4. I've tried adding logging to see what the output of `user` is, and it returns `null` when no associated profile exists, but I'm not sure if that's causing the behavior. Any insights on how to handle this properly or where I might be going wrong would be greatly appreciated! I'm working on a API that needs to handle this. Any help would be greatly appreciated!