Src devdocs3/23/2023 ![]() Copy, paste and run the install.sql script in your Supabase SQL Editor.At its core, webpack is a static module bundler for modern JavaScript applications. Let's start with installing the custom claims SQL functions. With these in mind, let's go ahead and set up Supabase Custom Claims on our database. Our app can access the getter and setter functions via Supabase Remote Procedure Calls (RPCs) with the supabaseClient.rpc() method.So we need to bootstrap a claims_admin role for a first user using the Supabase SQL Editor. Only a user with a claim can set claims data on others.Here are two crucial particulars on how they work: These functions allow us to set and get custom claims for a particular user in the ers table. Due credits to they are enabled by installing a number of functions on our database. Supabase does not support custom claims on its own. We are going to use these custom claims to set and retrieve user roles for our app. ![]() These claims are stored in the _app_meta_data field and is sent to the client with the access token. Supabase Custom Claims is a community contribution that enables setting additional data to the access token that a user receives from Supabase. Setting Up User Roles with Supabase Custom Claims One way to implement this is with Supabase Custom Claims. ![]() So, before we can use the getPermissions() method, we have to set up custom user roles. And only two role options are available to the front end app: authenticated and anon. So, it is not possible to set editor and admin roles we need for our designated users. ![]() However, Supabase in itself does not support setting user roles to users in the ers table. In the can method above let's set the first argument of enforcer.enforce() to "editor": We expect this behavior to change when we change the role. When we visit the /canvases route, we should have all the buttons displayed. That is, we should be able to view the contents of both our /users and /canvases resources like they were before. With this code now, there should be no change in our UI. At the end, we get the Boolean decision based on the model's policy effect.įrom inside a component, the accessControlProvider.can method will be invoked via the useCan() hook. We want this enforcer to enforce the policies with its accepted arguments. In the above code, we are initializing a Casbin Enforcer with the model and adapter. We expect the useCan() access control hook to take these two arguments.įor more use cases and implementations of can, feel free to go through the elaborate examples in this definitive and guiding post. We will finalize it after we update the getPermissions() method in Supabase authProvider.īut for now, notice in the above definition that we are passing the compulsory resource and action parameters to can. We will modify this gradually to witness the functionality facilitated out-of-the-box by refine for each role defined in the policies. If / when you are familiar, lovely yay! Be with me, go ahead and install Casbin: For a complete beginner, I recommend understanding the following sections in the Casbin docs: If you are not familiar with Casbin, please feel free to go through how it works. In this app, we are implementing Role Based Access Control model with Casbin so we assume you are at least familiar with the RBAC related models and policies. We also dig into some low level code in the component that refine's Ant Design package gives us to see how authorization comes baked into some of the related components. Supabase Custom Claims are a handy mechanism to store user roles information on the ers table. We then make use of refine's accessControlProvider and associated hooks to enforce policies for these roles.įor the backend, we set and store user roles with the help of Supabase Custom Claims. We manage RBAC and authorization using Casbin models and policies.
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