db/dump/dump.after.sql

@@ -1 +1,10 @@
--- Executed after dump
+CREATE USER 'vn'@'localhost';
+
+GRANT SELECT,
+        INSERT,
+        UPDATE,
+        DELETE,
+        CREATE TEMPORARY TABLES,
+        EXECUTE,
+        TRIGGER
+    ON *.* TO 'vn'@'localhost';

loopback/locale/es.json

@@ -371,5 +371,6 @@
 	"The sale not exists in the item shelving": "La venta no existe en la estantería del artículo",
 	"The entry not have stickers": "La entrada no tiene etiquetas",
 	"Too many records": "Demasiados registros",
-    "Original invoice not found": "Factura original no encontrada"
-}
+	"Original invoice not found": "Factura original no encontrada",
+	"The entry has no lines or does not exist": "La entrada no tiene lineas o no existe"
+}

modules/entry/back/methods/entry/getBuysCsv.js

@@ -1,5 +1,6 @@
 const {toCSV} = require('vn-loopback/util/csv');
 const {flatten} = require('vn-loopback/util/flatten');
+const UserError = require('vn-loopback/util/user-error');
 
 module.exports = Self => {
     Self.remoteMethodCtx('getBuysCsv', {
@@ -36,6 +37,7 @@ module.exports = Self => {
 
     Self.getBuysCsv = async(ctx, id, options) => {
         const data = await Self.getBuys(ctx, id, null, options);
+        if (!data.length) throw new UserError('The entry has no lines or does not exist');
         const dataFlatted = flatten(data);
         return [toCSV(dataFlatted), 'text/csv', `inline; filename="buys-${id}.csv"`];
     };