Core 2 is included in the Fastify SDK starting with version 1. This release ships with a variety of smaller DX improvements and housekeeping items. Each of the potentially breaking changes are detailed in this guide, below.
By the end of this guide, you’ll have successfully upgraded your Fastify project to use @clerk/fastify v5. You’ll learn how to update your dependencies, resolve breaking changes, and find deprecations. Step-by-step instructions will lead you through the process.
Preparing to upgrade
Before uprading, it's highly recommended that you update your Clerk SDKs to the latest Core 1 version (npm i @clerk/fastify@0). Some changes required for Core 2 SDKs can be applied incrementally to the v1 release, which should contribute to a smoother upgrading experience. After updating, look out for deprecation messages in your terminal and browser console. By resolving these deprecations you'll be able to skip many breaking changes from Core 2.
Note that Core 2 is currently in beta, while we field feedback and ensure stability. Deploying beta versions to production is not recommended and should be done at your own risk.
Additionally, some of the minumum version requirements for some base dependencies have been updated such that versions that are no longer supported or are at end-of-life are no longer guaranteed to work correctly with Clerk.
Updating Node.js
You need to have Node.js 18.17.0 or later installed. Last year, Node.js 16 entered EOL (End of life) status, so support for this version has been removed across Clerk SDKs. You can check your Node.js version by running node -v in your terminal. Learn more about how to update and install Node.js(opens in a new tab).
Updating to Core 2 Beta
Whenever you feel ready, go ahead and install the latest beta version of any Clerk SDKs you are using. Make sure that you are prepared to patch some breaking changes before your app will work properly, however. The commands below demonstrate how to install the latest beta.
terminal
npminstall@clerk/fastify@beta
terminal
yarnadd@clerk/fastify@beta
terminal
pnpmadd@clerk/fastify@beta
CLI upgrade helper
Clerk now provides a @clerk/upgrade CLI tool that you can use to ease the upgrade process. The tool will scan your codebase and produce a list of changes you'll need to apply to your project. It should catch the vast majority of the changes needed for a successful upgrade to any SDK including Core 2. This can save you a lot of time reading through changes that don't apply to your project.
To run the CLI tool, navigate to your project and run it in the terminal:
terminal
npx@clerk/upgrade
terminal
yarndlx@clerk/upgrade
terminal
pnpmdlx@clerk/upgrade
If you are having trouble with npx, it's also possible to install directly with npm i @clerk/upgrade -g, and can then be run with the clerk-upgrade command.
Breaking Changes
Removed: orgs claim on JWT
In the previous version of Clerk's SDKs, if you decode the session token that Clerk returns from the server, you'll currently find an orgs claim on it. It lists all the orgs associated with the given user. Now, Clerk returns the org_id, org_slug, and org_role of the active organization.
The orgs claim was part of the JwtPayload. Here are a few examples of where the JwtPayload could be found.
If you would like to have your JWT return all of the user's organizations, you can create a custom JWT template in your dashboard. Add { "orgs": "user.organizations" } to it.
Image URL Name Consolidation
There are a number of Clerk primitives that contain images, and previously they each had different property names, like avatarUrl, logoUrl, profileImageUrl, etc. In order to promote consistency and make it simpler for developers to know where to find associated images, all image properties are now named imageUrl. See the list below for all affected classes:
The profileImageUrl property of any OrganizationMembershipPublicUserData object has been changed to imageUrl.
Deprecation removals & housekeeping
As part of this major version, a number of previously deprecated props, arugments, methods, etc. have been removed. Additionally there have been some changes to things that are only used internally, or only used very rarely. It's highly unlikely that any given app will encounter any of these items, but they are all breaking changes, so they have all been documented below.
For this section more than any other one, please use the CLI upgrade tool (npx @clerk/upgrade). Changes in this
section are very unlikely to appear in your codebase, the tool will save time looking for them.
Deprecation removals
If you are updating a user's password via the User.update method(opens in a new tab), it must be changed to User.updatePassword(opens in a new tab) instead. This method will require the current password as well as the desired new password. We made this update to improve the security of password changes. Example below:
The CLERK_API_KEY environment variable was renamed to CLERK_SECRET_KEY. You can visit your Clerk dashboard(opens in a new tab) to copy/paste the new keys after choosing your framework. Make sure to update this in all environments (e.g. dev, staging, production).
The CLERK_FRONTEND_API environment variable was renamed to CLERK_PUBLISHABLE_KEY. You can visit your Clerk dashboard(opens in a new tab) to copy/paste the new keys after choosing your framework. Make sure to update this in all environments (e.g. dev, staging, production). Note: The values are different, so this is not just a key replacement. More information.
The apiKey argument passed to createClerkClient must be changed to secretKey.
The frontendApi argument passed to createClerkClient must be changed to publishableKey. Note that the values of the two keys are different, so both keys and values need to be changed. You can find your application's publishable key in the Clerk dashboard.
The frontendApi argument passed to clerkPlugin must be changed to publishableKey. Note that the values of the two keys are different, so both keys and values need to be changed. You can find your application's publishable key in the Clerk dashboard.
There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:
There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:
There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:
There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:
There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:
There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:
There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:
There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:
The response payload of Users.getOrganizationInvitationList was changed as part of the v5 release. Rather than directly returning data, the return signature is now { data, totalCount }. Since backend API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily, and this change in the backend SDK aligns the response shape with what the backend API returns directly.
Here's an example of how the response shape would change with this modification:
The return type for this function was previously [Items] but has now been updated to { data: [Items], totalCount: number }. Since Clerk's API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily. A before/after code example can be seen below:
The return type for this function was previously [Items] but has now been updated to { data: [Items], totalCount: number }. Since Clerk's API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily. A before/after code example can be seen below:
The response payload of Users.getOrganizationList was changed as part of the v5 release. Rather than directly returning data, the return signature is now { data, totalCount }. Since backend API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily, and this change in the backend SDK aligns the response shape with what the backend API returns directly.
Here's an example of how the response shape would change with this modification:
The return type for this function was previously [Items] but has now been updated to { data: [Items], totalCount: number }. Since Clerk's API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily. A before/after code example can be seen below:
The value of this export has changed from https://api.clerk.dev to https://api.clerk.com. If you were relying on the text content of this value not changing, you may need to make adjustments.
The Clerk default import has changed to createClerkClient and been moved to a named import rather than default. You must update your import path in order for it to work correctly. Example below of the fix that needs to be made:
- import Clerk from "@clerk/fastify"+ import { createClerkClient } from "@clerk/fastify"