salix/back/methods/collection/setSaleQuantity.js

module.exports = Self => {
    Self.remoteMethodCtx('setSaleQuantity', {
        description: 'Update sale quantity',
        accessType: 'WRITE',
        accepts: [{
            arg: 'saleId',
            type: 'number',
            required: true,
            description: 'The sale id'
        },
        {
            arg: 'quantity',
            type: 'number',
            required: true,
            description: 'The quantity to picked'
        }],
        returns: {
            type: 'object',
            root: true
        },
        http: {
            path: `/setSaleQuantity`,
            verb: 'POST'
        }
    });

    Self.setSaleQuantity = async ctx => {
        const args = ctx.args;
        const models = Self.app.models;

        const sale = await models.Sale.findById(args.saleId);
        return await sale.updateAttribute('quantity', args.quantity);
    };
};