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JavaScript Using SQL ORMs with Node.js Getting Started with Sequelize Define a Model

Posted by AJ Keith
AJ Keith
10,204 Points

TypeError: Class constructor Movie cannot be invoked without 'new' at Object.<anonymous>

When running via 'npm start' script, the terminal returns "TypeError: Class constructor Movie cannot be invoked without 'new' at Object.<anonymous>".

The error flags the line of code where the async function is run. I have tried replacing the init function with sequelize.define but I am getting the same result.

jpizzle
jpizzle
36,395 Points

can you share your code?

1 Answer

Brian Wright
Brian Wright
6,770 Points

I had this problem and was pulling my hair out trying to resolve it. After creating a test folder to resolve the problem I manage to run the exact same code with no issues. The problem I found in my original code is that when I tried to run Movie.sync() or sequelize.sync() inside the IIFE I got the error. After running sync() outside the IIFE or moving Movie.init() inside the IIFE everything was OK. Here is my code:

const sync = async () => { try { await sequelize.sync({ force: true }) } catch (err) { console.error(err.message); } }

sync();