diff --git a/services/loopback/common/methods/sale/updatePrice.js b/services/loopback/common/methods/sale/updatePrice.js
index b19bc6c40..a21c13f25 100644
--- a/services/loopback/common/methods/sale/updatePrice.js
+++ b/services/loopback/common/methods/sale/updatePrice.js
@@ -52,7 +52,7 @@ module.exports = Self => {
 
         let ticket = await Self.getTicket(params);
         let usesMana = await model.WorkerMana.findOne({where: {workerFk: ticket[0].client().salesPersonFk}, fields: 'amount'});
-        let currentLine = await Self.app.models.Sale.findOne({where: {id: params.id}, fields: 'price'});
+        let currentLine = await Self.app.models.Sale.findOne({where: {id: params.id}});
 
         let componentToUse;
         if (usesMana)
@@ -67,7 +67,7 @@ module.exports = Self => {
 
         await Self.rawSql(query, [params.id, componentToUse, value, value]);
 
-        await Self.app.models.Sale.update({id: params.id}, {price: params.price});
+        await currentLine.updateAttributes({price: params.price});
 
         query = `call vn.manaSpellersRequery(?)`;
         await Self.rawSql(query, [ticket[0].client().salesPersonFk]);
diff --git a/services/loopback/common/methods/sale/updateQuantity.js b/services/loopback/common/methods/sale/updateQuantity.js
index a55ce9dee..2ced56dad 100644
--- a/services/loopback/common/methods/sale/updateQuantity.js
+++ b/services/loopback/common/methods/sale/updateQuantity.js
@@ -30,10 +30,10 @@ module.exports = Self => {
         if (isNaN(quantity))
             throw new UserError(`The value should be a number`);
 
-        let currentLine = await Self.app.models.Sale.findOne({where: {id: id}, fields: ['quantity']});
+        let currentLine = await Self.app.models.Sale.findOne({where: {id: id}});
         if (quantity > currentLine.quantity)
             throw new UserError('The new quantity should be smaller than the old one');
 
-        return await Self.app.models.Sale.update({id: id}, {quantity: quantity});
+        return await currentLine.updateAttributes({quantity: quantity});
     };
 };
diff --git a/services/loopback/common/methods/ticket/deleted.js b/services/loopback/common/methods/ticket/deleted.js
index 2636963a8..9ce9b8ad7 100644
--- a/services/loopback/common/methods/ticket/deleted.js
+++ b/services/loopback/common/methods/ticket/deleted.js
@@ -20,7 +20,8 @@ module.exports = Self => {
     });
 
     Self.deleted = async(ctx, params) => {
-        await Self.app.models.Ticket.update({id: params.id}, {isDeleted: '1'});
+        let currentTicket = await Self.app.models.Ticket.findById(params.id);
+        await currentTicket.updateAttributes({isDeleted: '1'});
 
         if (ctx.req.accessToken) {
             let token = ctx.req.accessToken;