The column must have a defined value and cannot be left empty

I encountered an issue while trying to populate a database with seed data. The error message I received is:

name: 'SequelizeDatabaseError', 
parent: Error: Column 'id' cannot be null
code: 'ER_BAD_NULL_ERROR',
errno: 1048,
sqlState: '23000',
sqlMessage: "Column 'id' cannot be null"

Below is the code snippet used to seed the data:

const seedUsers = require('./user-seeds');
const seedPosts = require('./post-seeds');
const seedComments = require('./comment-seeds');
const seedVotes = require('./vote-seeds');

const sequelize = require('../config/connection');

const seedAll = async () => {
  await sequelize.sync({ force: true });
  console.log('--------------');
  await seedUsers();
  console.log('--------------');

  await seedPosts();
  console.log('--------------');

  await seedComments();
  console.log('--------------');

  await seedVotes();
  console.log('--------------');

  process.exit(0);
};

seedAll().catch(err => console.log('seedAll error: ', err));

The error specifically occurs during the execution of `seedPost()`. Here is the relevant model:

const { Model, DataTypes } = require('sequelize');
const sequelize = require('../config/connection');

// Post Model definition
class Post extends Model {
    // Method for upvoting posts
    static upvote(body, models) {
        return models.Vote.create({
            user_id: body.user_id,
            post_id: body.post_id
        }).then(() => {
            // Additional logic for retrieving post and related data
        });
    }
}

// Define fields/columns for Post model
Post.init(
    {
        id: {
            type: DataTypes.INTEGER,
            allowNull: false,
            primaryKey: true,
            autoincrement: true
        },
        title: {
            type: DataTypes.STRING,
            allowNull: false
        },
        post_url: {
            type: DataTypes.STRING,
            allowNull: false,
            validate: {
                isURL: true
            }
        },
        user_id: {
            type: DataTypes.INTEGER,
            references: {
                model: 'user',
                key: 'id'
            }
        }
    },
    {
        sequelize,
        freezeTableName: true,
        underscored: true,
        modelName: 'post'
    }
);

module.exports = Post;

This is how my seed file appears:

const { Post } = require('../models');

const postdata = [
  {
    title: 'Donec posuere metus vitae ipsum.',
    post_url: 'https://buzzfeed.com/in/imperdiet/et/commodo/vulputate.png',
    user_id: 10
  },
  {
    // ... additional seed data
  }
];

const seedPosts = () => Post.bulkCreate(postdata);

module.exports = seedPosts;

If you have any insights on what might be causing this issue, your assistance would be highly appreciated!

Answer №1

// defining a new field/column for the Post model
Post.init(
    {
        id: {
            type: DataTypes.INTEGER,
            allowNull: false,
            primaryKey: true,
            autoincrement: true
        },

When setting up your Post.init, ensure that autoincrement is changed to autoIncrement. It may be necessary to recreate the table in your specific scenario.

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