salix/modules/invoiceIn/back/methods/invoice-in/getTotals.js

module.exports = Self => {
    Self.remoteMethod('getTotals', {
        description: 'Return totals for an invoiceIn',
        accessType: 'READ',
        accepts: {
            arg: 'id',
            type: 'number',
            required: true,
            description: 'invoiceIn id',
            http: {source: 'path'}
        },
        returns: {
            type: 'object',
            root: true
        },
        http: {
            path: '/:id/getTotals',
            verb: 'GET'
        }
    });

    Self.getTotals = async(id, options) => {
        const myOptions = {};

        if (typeof options == 'object')
            Object.assign(myOptions, options);

        const [result] = await Self.rawSql(`
            SELECT iit.*,
                    SUM(iidd.amount) totalDueDay
                FROM vn.invoiceIn ii
                    LEFT JOIN (SELECT SUM(iit.taxableBase) totalTaxableBase,
                                CAST(SUM(iit.taxableBase * (1 + (ti.PorcentajeIva / 100))) AS DECIMAL(10,2)) totalVat
                            FROM vn.invoiceInTax iit 
                                LEFT JOIN sage.TiposIva ti ON ti.CodigoIva = iit.taxTypeSageFk 
                            WHERE iit.invoiceInFk = ?) iit ON TRUE
                    LEFT JOIN vn.invoiceInDueDay iidd ON iidd.invoiceInFk = ii.id 
                WHERE
                    ii.id = ?`, [id, id]);

        return result;
    };
};