diff --git a/back/models/dms.js b/back/models/dms.js
index d6eab4fe4..adebd2bb3 100644
--- a/back/models/dms.js
+++ b/back/models/dms.js
@@ -65,4 +65,89 @@ module.exports = Self => {
         await stream.pipe(writeStream);
         return dms;
     };
+
+    Self.uploadFileTemplate = async(ctx, id, model, foreignKey, options) => {
+        const {Dms, [model]: modelDms} = Self.app.models;
+        const myOptions = {};
+        let tx;
+
+        if (typeof options == 'object')
+            Object.assign(myOptions, options);
+
+        if (!myOptions.transaction) {
+            tx = await Self.beginTransaction({});
+            myOptions.transaction = tx;
+        }
+
+        try {
+            const uploadedFiles = await Dms.uploadFile(ctx, myOptions);
+            const promises = uploadedFiles.map(dms =>
+                modelDms.create({
+                    [foreignKey]: id,
+                    dmsFk: dms.id
+                }, myOptions)
+
+            );
+            await Promise.all(promises);
+
+            if (tx) await tx.commit();
+
+            return uploadedFiles;
+        } catch (e) {
+            if (tx) await tx.rollback();
+            throw e;
+        }
+    };
+
+    Self.removeFileTemplate = async(ctx, id, currentSelf, options) => {
+        const myOptions = {};
+        let tx;
+
+        if (typeof options == 'object')
+            Object.assign(myOptions, options);
+
+        if (!myOptions.transaction) {
+            tx = await currentSelf.beginTransaction({});
+            myOptions.transaction = tx;
+        }
+
+        try {
+            const targetModelDms = await currentSelf.findById(id, null, myOptions);
+            const targetDms = await Self.removeFile(ctx, targetModelDms.dmsFk, myOptions);
+
+            if (!targetDms || !targetModelDms)
+                throw new UserError('Try again');
+
+            const modelDmsDestroyed = await targetModelDms.destroy(myOptions);
+
+            if (tx) await tx.commit();
+
+            return modelDmsDestroyed;
+        } catch (e) {
+            if (tx) await tx.rollback();
+            throw e;
+        }
+    };
+
+    Self.downloadFileTemplate = async(id, container) => {
+        const models = Self.app.models;
+        const Container = models[container];
+        const dms = await models.Dms.findById(id);
+        const pathHash = Container.getHash(dms.id);
+        try {
+            await Container.getFile(pathHash, dms.file);
+        } catch (e) {
+            if (e.code != 'ENOENT')
+                throw e;
+
+            const error = new UserError(`File doesn't exists`);
+            error.statusCode = 404;
+
+            throw error;
+        }
+
+        const stream = Container.downloadStream(pathHash, dms.file);
+
+        return [stream, dms.contentType, `filename="${dms.file}"`];
+    };
 };
diff --git a/modules/claim/back/methods/claim-dms/removeFile.js b/modules/claim/back/methods/claim-dms/removeFile.js
index 28e78c9d7..eb3adea31 100644
--- a/modules/claim/back/methods/claim-dms/removeFile.js
+++ b/modules/claim/back/methods/claim-dms/removeFile.js
@@ -1,5 +1,3 @@
-const UserError = require('vn-loopback/util/user-error');
-
 module.exports = Self => {
     Self.remoteMethodCtx('removeFile', {
         description: 'Removes a claim document',
@@ -20,35 +18,7 @@ module.exports = Self => {
         }
     });
 
-    Self.removeFile = async(ctx, id, options) => {
-        const myOptions = {};
-        let tx;
-
-        if (typeof options == 'object')
-            Object.assign(myOptions, options);
-
-        if (!myOptions.transaction) {
-            tx = await Self.beginTransaction({});
-            myOptions.transaction = tx;
-        }
-
-        try {
-            const claimDms = await Self.findById(id, null, myOptions);
-
-            const targetDms = await Self.app.models.Dms.removeFile(ctx, claimDms.dmsFk, myOptions);
-
-            if (!targetDms || ! claimDms)
-                throw new UserError('Try again');
-
-            const claimDmsDestroyed = await claimDms.destroy(myOptions);
-
-            if (tx) await tx.commit();
-
-            return claimDmsDestroyed;
-        } catch (e) {
-            if (tx) await tx.rollback();
-            throw e;
-        }
-    };
+    Self.removeFile = async(ctx, id, options) =>
+        Self.app.models.Dms.removeFileTemplate(ctx, id, Self, options);
 };
 
diff --git a/modules/claim/back/methods/claim/downloadFile.js b/modules/claim/back/methods/claim/downloadFile.js
index ffcf51367..f15d6ae92 100644
--- a/modules/claim/back/methods/claim/downloadFile.js
+++ b/modules/claim/back/methods/claim/downloadFile.js
@@ -1,7 +1,5 @@
-const UserError = require('vn-loopback/util/user-error');
-
 module.exports = Self => {
-    Self.remoteMethodCtx('downloadFile', {
+    Self.remoteMethod('downloadFile', {
         description: 'Get the claim file',
         accessType: 'READ',
         accepts: [
@@ -36,25 +34,6 @@ module.exports = Self => {
         accessScopes: ['DEFAULT', 'read:multimedia']
     });
 
-    Self.downloadFile = async function(ctx, id) {
-        const models = Self.app.models;
-        const ClaimContainer = models.ClaimContainer;
-        const dms = await models.Dms.findById(id);
-        const pathHash = ClaimContainer.getHash(dms.id);
-        try {
-            await ClaimContainer.getFile(pathHash, dms.file);
-        } catch (e) {
-            if (e.code != 'ENOENT')
-                throw e;
-
-            const error = new UserError(`File doesn't exists`);
-            error.statusCode = 404;
-
-            throw error;
-        }
-
-        const stream = ClaimContainer.downloadStream(pathHash, dms.file);
-
-        return [stream, dms.contentType, `filename="${dms.file}"`];
-    };
+    Self.downloadFile = async id =>
+        Self.app.models.Dms.downloadFileTemplate(id, 'ClaimContainer');
 };
diff --git a/modules/claim/back/methods/claim/specs/downloadFile.spec.js b/modules/claim/back/methods/claim/specs/downloadFile.spec.js
index 3e46a9bc3..eb1c3c79e 100644
--- a/modules/claim/back/methods/claim/specs/downloadFile.spec.js
+++ b/modules/claim/back/methods/claim/specs/downloadFile.spec.js
@@ -1,12 +1,9 @@
 const app = require('vn-loopback/server/server');
 
 describe('claim downloadFile()', () => {
-    const dmsId = 7;
-
     it('should return a response for an employee with image content-type', async() => {
-        const workerId = 1107;
-        const ctx = {req: {accessToken: {userId: workerId}}};
-        const result = await app.models.Claim.downloadFile(ctx, dmsId);
+        const dmsId = 7;
+        const result = await app.models.Claim.downloadFile(dmsId);
 
         expect(result[1]).toEqual('image/jpeg');
     });
diff --git a/modules/claim/back/methods/claim/uploadFile.js b/modules/claim/back/methods/claim/uploadFile.js
index 4fd041456..a5fd9b405 100644
--- a/modules/claim/back/methods/claim/uploadFile.js
+++ b/modules/claim/back/methods/claim/uploadFile.js
@@ -53,34 +53,6 @@ module.exports = Self => {
         }
     });
 
-    Self.uploadFile = async(ctx, id, options) => {
-        const {Dms, ClaimDms} = Self.app.models;
-        const myOptions = {};
-        let tx;
-
-        if (typeof options == 'object')
-            Object.assign(myOptions, options);
-
-        if (!myOptions.transaction) {
-            tx = await Self.beginTransaction({});
-            myOptions.transaction = tx;
-        }
-
-        try {
-            const uploadedFiles = await Dms.uploadFile(ctx, myOptions);
-
-            const promises = uploadedFiles.map(dms => ClaimDms.create({
-                claimFk: id,
-                dmsFk: dms.id
-            }, myOptions));
-            await Promise.all(promises);
-
-            if (tx) await tx.commit();
-
-            return uploadedFiles;
-        } catch (e) {
-            if (tx) await tx.rollback();
-            throw e;
-        }
-    };
+    Self.uploadFile = async(ctx, id, options) =>
+        Self.app.models.Dms.uploadFileTemplate(ctx, id, 'ClaimDms', 'claimFk', options);
 };
diff --git a/modules/client/back/methods/client-dms/removeFile.js b/modules/client/back/methods/client-dms/removeFile.js
index bc9a0f719..2cab64d28 100644
--- a/modules/client/back/methods/client-dms/removeFile.js
+++ b/modules/client/back/methods/client-dms/removeFile.js
@@ -18,35 +18,7 @@ module.exports = Self => {
         }
     });
 
-    Self.removeFile = async(ctx, id, options) => {
-        const myOptions = {};
-        let tx;
-
-        if (typeof options == 'object')
-            Object.assign(myOptions, options);
-
-        if (!myOptions.transaction) {
-            tx = await Self.beginTransaction({});
-            myOptions.transaction = tx;
-        }
-
-        try {
-            const clientDms = await Self.findById(id, null, myOptions);
-
-            const targetDms = await Self.app.models.Dms.removeFile(ctx, clientDms.dmsFk, myOptions);
-
-            if (!targetDms || !clientDms)
-                throw new UserError('Try again');
-
-            const clientDmsDestroyed = await clientDms.destroy(myOptions);
-
-            if (tx) await tx.commit();
-
-            return clientDmsDestroyed;
-        } catch (e) {
-            if (tx) await tx.rollback();
-            throw e;
-        }
-    };
+    Self.removeFile = async(ctx, id, options) =>
+        Self.app.models.Dms.removeFileTemplate(ctx, id, Self, options);
 };
 
diff --git a/modules/client/back/methods/client/uploadFile.js b/modules/client/back/methods/client/uploadFile.js
index 1a5965955..5f7bb7f9a 100644
--- a/modules/client/back/methods/client/uploadFile.js
+++ b/modules/client/back/methods/client/uploadFile.js
@@ -54,36 +54,6 @@ module.exports = Self => {
         }
     });
 
-    Self.uploadFile = async(ctx, id, options) => {
-        const {Dms, ClientDms} = Self.app.models;
-        const myOptions = {};
-        let tx;
-
-        if (typeof options == 'object')
-            Object.assign(myOptions, options);
-
-        if (!myOptions.transaction) {
-            tx = await Self.beginTransaction({});
-            myOptions.transaction = tx;
-        }
-
-        try {
-            const uploadedFiles = await Dms.uploadFile(ctx, myOptions);
-            const promises = uploadedFiles.map(dms =>
-                ClientDms.create({
-                    clientFk: id,
-                    dmsFk: dms.id
-                }, myOptions)
-
-            );
-            await Promise.all(promises);
-
-            if (tx) await tx.commit();
-
-            return uploadedFiles;
-        } catch (e) {
-            if (tx) await tx.rollback();
-            throw e;
-        }
-    };
+    Self.uploadFile = async(ctx, id, options) =>
+        Self.app.models.Dms.uploadFileTemplate(ctx, id, 'ClientDms', 'clientFk', options);
 };
diff --git a/modules/entry/back/methods/entry-dms/downloadFile.js b/modules/entry/back/methods/entry-dms/downloadFile.js
index a4f10f9dc..6ab7154a0 100644
--- a/modules/entry/back/methods/entry-dms/downloadFile.js
+++ b/modules/entry/back/methods/entry-dms/downloadFile.js
@@ -1,7 +1,5 @@
-const UserError = require('vn-loopback/util/user-error');
-
 module.exports = Self => {
-    Self.remoteMethodCtx('downloadFile', {
+    Self.remoteMethod('downloadFile', {
         description: 'Get the entry file',
         accessType: 'READ',
         accepts: [
@@ -35,25 +33,6 @@ module.exports = Self => {
         }
     });
 
-    Self.downloadFile = async function(ctx, id) {
-        const models = Self.app.models;
-        const EntryContainer = models.EntryContainer;
-        const dms = await models.Dms.findById(id);
-        const pathHash = EntryContainer.getHash(dms.id);
-        try {
-            await EntryContainer.getFile(pathHash, dms.file);
-        } catch (e) {
-            if (e.code != 'ENOENT')
-                throw e;
-
-            const error = new UserError(`File doesn't exists`);
-            error.statusCode = 404;
-
-            throw error;
-        }
-
-        const stream = EntryContainer.downloadStream(pathHash, dms.file);
-
-        return [stream, dms.contentType, `filename="${dms.file}"`];
-    };
+    Self.downloadFile = async id =>
+        Self.app.models.Dms.downloadFileTemplate(id, 'EntryContainer');
 };
diff --git a/modules/entry/back/methods/entry-dms/removeFile.js b/modules/entry/back/methods/entry-dms/removeFile.js
index 89a87755c..f28c3fa2b 100644
--- a/modules/entry/back/methods/entry-dms/removeFile.js
+++ b/modules/entry/back/methods/entry-dms/removeFile.js
@@ -1,5 +1,3 @@
-const UserError = require('vn-loopback/util/user-error');
-
 module.exports = Self => {
     Self.remoteMethodCtx('removeFile', {
         description: 'Removes a entry document',
@@ -20,34 +18,7 @@ module.exports = Self => {
         }
     });
 
-    Self.removeFile = async(ctx, id, options) => {
-        const myOptions = {};
-        let tx;
-
-        if (typeof options == 'object')
-            Object.assign(myOptions, options);
-
-        if (!myOptions.transaction) {
-            tx = await Self.beginTransaction({});
-            myOptions.transaction = tx;
-        }
-
-        try {
-            const targetEntryDms = await Self.findById(id, null, myOptions);
-            const targetDms = await Self.app.models.Dms.removeFile(ctx, targetEntryDms.dmsFk, myOptions);
-
-            if (!targetDms)
-                throw new UserError('Try again');
-
-            const entryDmsDestroyed = await targetEntryDms.destroy(myOptions);
-
-            if (tx) await tx.commit();
-
-            return entryDmsDestroyed;
-        } catch (e) {
-            if (tx) await tx.rollback();
-            throw e;
-        }
-    };
+    Self.removeFile = async(ctx, id, options) =>
+        Self.app.models.Dms.removeFileTemplate(ctx, id, Self, options);
 };
 
diff --git a/modules/entry/back/methods/entry-dms/uploadFile.js b/modules/entry/back/methods/entry-dms/uploadFile.js
index 54b56fed4..f29506aa7 100644
--- a/modules/entry/back/methods/entry-dms/uploadFile.js
+++ b/modules/entry/back/methods/entry-dms/uploadFile.js
@@ -53,34 +53,6 @@ module.exports = Self => {
         }
     });
 
-    Self.uploadFile = async(ctx, id, options) => {
-        const {Dms, EntryDms} = Self.app.models;
-        const myOptions = {};
-        let tx;
-
-        if (typeof options == 'object')
-            Object.assign(myOptions, options);
-
-        if (!myOptions.transaction) {
-            tx = await Self.beginTransaction({});
-            myOptions.transaction = tx;
-        }
-
-        try {
-            const uploadedFiles = await Dms.uploadFile(ctx, myOptions);
-
-            const promises = uploadedFiles.map(dms => EntryDms.create({
-                entryFk: id,
-                dmsFk: dms.id
-            }, myOptions));
-            await Promise.all(promises);
-
-            if (tx) await tx.commit();
-
-            return uploadedFiles;
-        } catch (e) {
-            if (tx) await tx.rollback();
-            throw e;
-        }
-    };
+    Self.uploadFile = async(ctx, id, options) =>
+        Self.app.models.Dms.uploadFileTemplate(ctx, id, 'EntryDms', 'entryFk', options);
 };
diff --git a/modules/supplier/back/methods/supplier/supplier-dms/removeFile.js b/modules/supplier/back/methods/supplier/supplier-dms/removeFile.js
index 04a9011f1..3671a747c 100644
--- a/modules/supplier/back/methods/supplier/supplier-dms/removeFile.js
+++ b/modules/supplier/back/methods/supplier/supplier-dms/removeFile.js
@@ -1,5 +1,3 @@
-const UserError = require('vn-loopback/util/user-error');
-
 module.exports = Self => {
     Self.remoteMethodCtx('removeFile', {
         description: 'Removes a entry document',
@@ -20,34 +18,7 @@ module.exports = Self => {
         }
     });
 
-    Self.removeFile = async(ctx, id, options) => {
-        const myOptions = {};
-        let tx;
-
-        if (typeof options == 'object')
-            Object.assign(myOptions, options);
-
-        if (!myOptions.transaction) {
-            tx = await Self.beginTransaction({});
-            myOptions.transaction = tx;
-        }
-
-        try {
-            const targetSupplierDms = await Self.findById(id, null, myOptions);
-            const targetDms = await Self.app.models.Dms.removeFile(ctx, targetSupplierDms.dmsFk, myOptions);
-
-            if (!targetDms)
-                throw new UserError('Try again');
-
-            const supplierDmsDestroyed = await targetSupplierDms.destroy(myOptions);
-
-            if (tx) await tx.commit();
-
-            return supplierDmsDestroyed;
-        } catch (e) {
-            if (tx) await tx.rollback();
-            throw e;
-        }
-    };
+    Self.removeFile = async(ctx, id, options) =>
+        Self.app.models.Dms.removeFileTemplate(ctx, id, Self, options);
 };
 
diff --git a/modules/supplier/back/methods/supplier/supplier-dms/uploadFile.js b/modules/supplier/back/methods/supplier/supplier-dms/uploadFile.js
index a9ff2d125..9b6ec2d14 100644
--- a/modules/supplier/back/methods/supplier/supplier-dms/uploadFile.js
+++ b/modules/supplier/back/methods/supplier/supplier-dms/uploadFile.js
@@ -53,34 +53,6 @@ module.exports = Self => {
         }
     });
 
-    Self.uploadFile = async(ctx, id, options) => {
-        const {Dms, SupplierDms} = Self.app.models;
-        const myOptions = {};
-        let tx;
-
-        if (typeof options == 'object')
-            Object.assign(myOptions, options);
-
-        if (!myOptions.transaction) {
-            tx = await Self.beginTransaction({});
-            myOptions.transaction = tx;
-        }
-
-        try {
-            const uploadedFiles = await Dms.uploadFile(ctx, myOptions);
-
-            const promises = uploadedFiles.map(dms => SupplierDms.create({
-                supplierFk: id,
-                dmsFk: dms.id
-            }, myOptions));
-            await Promise.all(promises);
-
-            if (tx) await tx.commit();
-
-            return uploadedFiles;
-        } catch (e) {
-            if (tx) await tx.rollback();
-            throw e;
-        }
-    };
+    Self.uploadFile = async(ctx, id, options) =>
+        Self.app.models.Dms.uploadFileTemplate(ctx, id, 'SupplierDms', 'supplierFk', options);
 };
diff --git a/modules/ticket/back/methods/ticket-dms/removeFile.js b/modules/ticket/back/methods/ticket-dms/removeFile.js
index 6fba4c552..54fc5ff56 100644
--- a/modules/ticket/back/methods/ticket-dms/removeFile.js
+++ b/modules/ticket/back/methods/ticket-dms/removeFile.js
@@ -18,35 +18,7 @@ module.exports = Self => {
         }
     });
 
-    Self.removeFile = async(ctx, id, options) => {
-        const myOptions = {};
-        let tx;
-
-        if (typeof options == 'object')
-            Object.assign(myOptions, options);
-
-        if (!myOptions.transaction) {
-            tx = await Self.beginTransaction({});
-            myOptions.transaction = tx;
-        }
-
-        try {
-            const ticketDms = await Self.findById(id, null, myOptions);
-
-            const targetDms = await Self.app.models.Dms.removeFile(ctx, ticketDms.dmsFk, myOptions);
-
-            if (!targetDms || !ticketDms)
-                throw new UserError('Try again');
-
-            const ticketDmsDestroyed = await ticketDms.destroy(myOptions);
-
-            if (tx) await tx.commit();
-
-            return ticketDmsDestroyed;
-        } catch (e) {
-            if (tx) await tx.rollback();
-            throw e;
-        }
-    };
+    Self.removeFile = async(ctx, id, options) =>
+        Self.app.models.Dms.removeFileTemplate(ctx, id, Self, options);
 };
 
diff --git a/modules/ticket/back/methods/ticket/uploadFile.js b/modules/ticket/back/methods/ticket/uploadFile.js
index 5b79aa973..07d4c8971 100644
--- a/modules/ticket/back/methods/ticket/uploadFile.js
+++ b/modules/ticket/back/methods/ticket/uploadFile.js
@@ -46,35 +46,6 @@ module.exports = Self => {
         }
     });
 
-    Self.uploadFile = async(ctx, id, options) => {
-        const {Dms, TicketDms} = Self.app.models;
-        const myOptions = {};
-        let tx;
-
-        if (typeof options == 'object')
-            Object.assign(myOptions, options);
-
-        if (!myOptions.transaction) {
-            tx = await Self.beginTransaction({});
-            myOptions.transaction = tx;
-        }
-
-        try {
-            const uploadedFiles = await Dms.uploadFile(ctx, myOptions);
-
-            const promises = uploadedFiles.map(dms => TicketDms.create({
-                ticketFk: id,
-                dmsFk: dms.id
-            }, myOptions));
-
-            await Promise.all(promises);
-
-            if (tx) await tx.commit();
-
-            return uploadedFiles;
-        } catch (e) {
-            if (tx) await tx.rollback();
-            throw e;
-        }
-    };
+    Self.uploadFile = async(ctx, id, options) =>
+        Self.app.models.Dms.uploadFileTemplate(ctx, id, 'TicketDms', 'ticketFk', options);
 };
diff --git a/modules/worker/back/methods/worker-dms/removeFile.js b/modules/worker/back/methods/worker-dms/removeFile.js
index 8eb6c05fd..540b8ff84 100644
--- a/modules/worker/back/methods/worker-dms/removeFile.js
+++ b/modules/worker/back/methods/worker-dms/removeFile.js
@@ -18,35 +18,7 @@ module.exports = Self => {
         }
     });
 
-    Self.removeFile = async(ctx, dmsFk, options) => {
-        const myOptions = {};
-        let tx;
-        if (typeof options == 'object')
-            Object.assign(myOptions, options);
-
-        if (!myOptions.transaction) {
-            tx = await Self.beginTransaction({});
-            myOptions.transaction = tx;
-        }
-
-        try {
-            const WorkerDms = await Self.findOne({
-                where: {document: dmsFk}
-            }, myOptions);
-
-            const targetDms = await Self.app.models.Dms.removeFile(ctx, dmsFk, myOptions);
-
-            if (!targetDms || !WorkerDms)
-                throw new UserError('Try again');
-
-            const workerDmsDestroyed = await WorkerDms.destroy(myOptions);
-            if (tx) await tx.commit();
-
-            return workerDmsDestroyed;
-        } catch (e) {
-            await tx.rollback();
-            throw e;
-        }
-    };
+    Self.removeFile = async(ctx, id, options) =>
+        Self.app.models.Dms.removeFileTemplate(ctx, id, Self, options);
 };
 
diff --git a/modules/worker/back/methods/worker/uploadFile.js b/modules/worker/back/methods/worker/uploadFile.js
index c3526cbb1..5c00a804f 100644
--- a/modules/worker/back/methods/worker/uploadFile.js
+++ b/modules/worker/back/methods/worker/uploadFile.js
@@ -46,34 +46,6 @@ module.exports = Self => {
         }
     });
 
-    Self.uploadFile = async(ctx, id) => {
-        const {Dms, WorkerDms} = Self.app.models;
-        const myOptions = {};
-        let tx;
-
-        if (typeof options == 'object')
-            Object.assign(myOptions, options);
-
-        if (!myOptions.transaction) {
-            tx = await Self.beginTransaction({});
-            myOptions.transaction = tx;
-        }
-
-        try {
-            const uploadedFiles = await Dms.uploadFile(ctx, myOptions);
-            const promises = uploadedFiles.map(dms =>
-                WorkerDms.create({
-                    workerFk: id,
-                    dmsFk: dms.id
-                }, myOptions));
-            await Promise.all(promises);
-
-            if (tx) await tx.commit();
-
-            return uploadedFiles;
-        } catch (e) {
-            if (tx) await tx.rollback();
-            throw e;
-        }
-    };
+    Self.uploadFile = async(ctx, id, options) =>
+        Self.app.models.Dms.uploadFileTemplate(ctx, id, 'WorkerDms', 'workerFk', options);
 };