Upgrade from Umbraco 8 to the latest version

Learn how to upgrade your Umbraco 8 project to Umbraco 10.

It is currently not possible to upgrade directly from Umbraco 8 to the latest version.

The recommended approach for upgrading from version 8 to the latest version is to use this guide to upgrade from Umbraco 8 to Umbraco 10. Umbraco 10 contains the database migrations that must be upgraded from Umbraco 8. You can then use the Upgrading to Major steps to upgrade from Umbraco 10 to the latest version.

Since the underlying framework going from Umbraco 8 to the latest version has changed, there is no direct upgrade path. That said, it is possible to re-use the database from your Umbraco 8 project on your new project in order to maintain the content.

It is not possible to migrate the custom code as the underlying web framework has been updated from ASP.NET to ASP.NET Core. All templates and custom code will need to be reimplemented.

You also need to make sure that the packages you are using are available on the latest version.

Prerequisites

A Umbraco 8 project running the latest version of Umbraco 8.
A backup of your Umbraco 8 project database.
A clean installation of the latest version of Umbraco.

If you use Umbraco Forms, then on the clean installation of Umbraco, you will need to install Umbraco.Forms package as well.

Video Tutorial

The video below shows how to complete the upgrade on an Umbraco Cloud project. Most of the process is the same, however, the video does contain some Cloud-specific elements.

Step 1: Content Migration

If you use Umbraco Forms, make sure to have StoreUmbracoFormsInDbsetto True before step 1.

Create a backup of the database from your Umbraco 8 project (after you have upgraded to the latest version of v8). For this, you can use the database backup guide.
Import the database backup into SQL Server Management Studio.
Update the connection string in the new projects appsettings.json file so that it connects to the Umbraco 8 database:

"ConnectionStrings": {
    "umbracoDbDSN": "Server=YourLocalSQLServerHere;Database=NameOfYourDatabaseHere;User Id=NameOfYourUserHere;Password=YourPasswordHere;TrustServerCertificate=True"
}

You can also add the connection details if you spin up a clean installation.

Run the new project and login to authorize the upgrade.
Select "Upgrade" when the upgrade wizard appears.
Once the upgrade has been completed, it's recommended to login to the backoffice to verify if your project is upgraded to new version.

This is only content migration and the database will be migrated.

You need to manually update the view files and custom code implementation. For more information, see Step 3 of this guide.

Step 2: File Migration

The following files/folders need to be copied from the Umbraco 8 project into the new project:
- ~/Views - Do not overwrite the default Macro and Partial View Macro files unless changes have been made to these.
- ~/Media - Media folder from v8 needs to be copied over into the wwwroot - media folder
- Any files/folders related to Stylesheets and JavaScript.
Migrate custom configuration from the Umbraco 8 configuration files (.config) into the appsettings.json file on the new project.
- As of Umbraco version 9, the configuration no longer lives in the Web.Config file and has been replaced by the appsettings.json file. Learn more about this in the Configuration article.
Migrate Umbraco Forms data to the database, if relevant.
- As of Umbraco Forms version 9, it is only possible to store Forms data in the database. If Umbraco Forms was used on the Umbraco 8 project, the files need to be migrated to the database.
Run the new project.
- It will give you an error screen on the frontend as none of the Template files have been updated. Follow Step 3 to resolve the errors.

Step 3: Custom Code in the latest version

The latest version of Umbraco is different from Umbraco 8 in many ways. With all the files and data migrated it is now time to rewrite and re-implement all custom code and templates.

Examples of changes

One of the changes is how published content is rendered through Template files. Due to this, it will be necessary to update all the Template files (.cshtml) to reflect these changes.

Read more about these changes in the IPublishedContent section of the Umbraco CMS documentation.

Template files need to inherit from Umbraco.Cms.Web.Common.Views.UmbracoViewPage<ContentModels.HomePage> instead of Umbraco.Web.Mvc.UmbracoViewPage<ContentModels.HomePage>
Template files need to use ContentModels = Umbraco.Cms.Web.Common.PublishedModels instead of ContentModels = Umbraco.Web.PublishedModels

For more information on the correct namespaces or custom code, you can find the references in the API Documentation article.

Depending on the extent of the project and the amount of custom code and implementations, this step is going to require a lot of work.

Once the new project runs without errors on a local setup it is time to deploy the website to production.

This concludes this tutorial. Find related information and further reading in the section below.

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Last updated 7 months ago