add method to check if the ticket has refunds

modules/ticket/back/methods/ticket/setDeleted.js

@@ -42,6 +42,11 @@ module.exports = Self => {
             if (!isEditable)
                 throw new UserError(`The sales of this ticket can't be modified`);
 
+            const hasRefunds = await checkRefunds(id, myOptions);
+
+            if (hasRefunds)
+                throw new UserError(`You must delete the refund id %d first`, 'DELETE_REFUND_FIRST', hasRefunds);
+
             // Check if has sales with shelving
             const isSalesAssistant = await models.Account.hasRole(userId, 'salesAssistant', myOptions);
             const sales = await models.Sale.find({
@@ -150,4 +155,16 @@ module.exports = Self => {
             throw e;
         }
     };
+
+    async function checkRefunds(id, options) {
+        const models = Self.app.models;
+        let refunds = await models.TicketRefund.find({
+            where: {ticketFk: id}
+        }, options);
+
+        if (refunds.length > 0)
+            return refunds[0].refundTicketFk;
+        else
+            return false;
+    }
 };