Sequelize get sum of columns from association tables

Question

I have two tables

CustomerAccount and CustomerAccountService

They are related in the following way:

CustomerAccount.hasMany(CustomerAccountService, {
    foreignKey: 'account_uuid'
});

CustomerAccountService.belongsTo(CustomerAccount, {
    as: 'account',
    foreignKey: 'account_uuid'
});

CustomerAccountService has two columns named invoice_amount and core_amount.

I want to get list of all CustomerAccount and within that list I want to show the sum of all invoice amounts and all core amounts for its children CustomerAccountService records.

This is the query I am trying:

CustomerAccount.findAll({
    attributes: [
        'uuid',
        'account_name',
        'account_number',
        'emergency_pay',
        [Sequelize.fn('SUM', Sequelize.col('CustomerAccountService.invoice_amount')), 'totalInvoiceAmount'],
        [Sequelize.fn('SUM', Sequelize.col('CustomerAccountService.core_amount')), 'totalCoreAmount']
    ],
    include: [
        {
            model: CustomerAccountService,
            attributes: []
        }
    ],
    group: ['CustomerAccount.uuid']
}).then(...);

However it throws an error saying

Unhandled rejection SequelizeDatabaseError: Unknown column 'CustomerAccountService.invoice_amount' in 'field list'

How do I get the sum of the two columns from the association table?

The model definition for CustomerAccountService is:

return sequelize.define(
        'customer_accounts_services', 
        {
            uuid: {
                type: type.STRING,
                primaryKey: true,
                autoIncrement: false
            },
            account_uuid: type.STRING,
            account_number: type.STRING,
            account_type: type.STRING,
            payment_type: type.STRING,
            service_type: type.STRING,
            date: type.DATEONLY,
            description: type.TEXT,
            invoice_amount: type.DECIMAL(10,2),
            core_amount: type.DECIMAL(10,2),
            paid: type.BOOLEAN
        },
        {
            timestamps: false,
            underscored: true,
            tableName: 'customer_accounts_services'
        }
    );

Answer 1

Your model definition set the table name to customer_accounts_services but you are passing in the Model name of CustomerAccountService to Sequelize.col() , which does not exist, so you are getting the error about the missing columns.

Update your query to use the correct table name in Sequelize.col() .

[Sequelize.fn('SUM', Sequelize.col('customer_accounts_services.invoice_amount')), 'totalInvoiceAmount'],
[Sequelize.fn('SUM', Sequelize.col('customer_accounts_services.core_amount')), 'totalCoreAmount']