other-emerald•14mo ago

get user role on authProvider

I have authProvider with supabase client how can I get user's role. I have called the function console.log(authProvider.getPermissions()); but it return a promise

11 Replies

kapa.ai•14mo ago

Hi @tandeptraiso1. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- The getPermissions method in authProvider is an asynchronous function, which means it returns a Promise. To get the actual value (user's role in this case), you need to use the await keyword or .then() method to resolve the Promise. Here's how you can do it:

authProvider.getPermissions().then((role) => {
  console.log(role);
});

authProvider.getPermissions().then((role) => {
  console.log(role);
});

Or using async/await:

async function getUserRole() {
  const role = await authProvider.getPermissions();
  console.log(role);
}

getUserRole();

async function getUserRole() {
  const role = await authProvider.getPermissions();
  console.log(role);
}

getUserRole();

Remember, await can only be used inside an async function. For more information, refer to the getPermissions documentation (https://refine.dev/docs/api-reference/core/providers/auth-provider/). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•14mo ago

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other-emeraldOP•14mo ago

@kapa.ai Cannot invoke an object which is possibly 'undefined'

kapa.ai•14mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- This error typically occurs when you're trying to call a function or access a property on an object that might not exist at runtime. In JavaScript and TypeScript, this can happen when the object or its property is undefined. In the context of React and Refine, this error often occurs when trying to use hooks or properties before they are defined. For example, if you're using the useForm or useStepsForm hooks in Refine, they return an object that includes formProps. If you try to use formProps before it's defined, you'll get this error. Here's an example of how to correctly use formProps:

import { useForm } from "@pankod/refine";

export const MyComponent: React.FC = () => {
  const { formProps } = useForm();

  return (
    <Form {...formProps}>
      {/* Your form fields go here */}
    </Form>
  );
};

import { useForm } from "@pankod/refine";

export const MyComponent: React.FC = () => {
  const { formProps } = useForm();

  return (
    <Form {...formProps}>
      {/* Your form fields go here */}
    </Form>
  );
};

In this example, formProps is destructured from the object returned by useForm, and then passed to the Form component. This ensures that formProps is defined before it's used. If you're dealing with potentially undefined values in your state, you can use optional chaining (?.) to safely access nested properties. For example, user?.names?.firstName would not throw an error or break the page because once it detects that the user or names object is missing, it immediately terminates the operation. For more information, refer to the Refine Discord support thread (https://discord.com/channels/837692625737613362/1131579446877487135) and the Refine blog post on common useState mistakes (https://refine.dev/blog/common-usestate-mistakes-and-how-to-avoid/). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•14mo ago

<@369510721135837184> kapa.ai is still learning and improving, please let us know how it did by reacting below

other-emeraldOP•14mo ago

@kapa.ai Cannot invoke an object which is possibly 'undefined'.ts (property) getPermissions?: ((params?: any) => Promise<unknown>) | undefined

kapa.ai•14mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- This error message is indicating that the getPermissions function could potentially be undefined. This can happen if the authProvider you're using doesn't have a getPermissions method, or if it's not yet initialized when you're trying to call it. To avoid this error, you should check if getPermissions is defined before calling it. You can do this using an if statement or the optional chaining operator (?.). Here's how you can do it with an if statement:

if (authProvider.getPermissions) {
  authProvider.getPermissions().then((permissions) => {
    console.log(permissions);
  });
}

if (authProvider.getPermissions) {
  authProvider.getPermissions().then((permissions) => {
    console.log(permissions);
  });
}

And here's how you can do it with optional chaining:

authProvider.getPermissions?.().then((permissions) => {
  console.log(permissions);
});

authProvider.getPermissions?.().then((permissions) => {
  console.log(permissions);
});

In both examples, the getPermissions function is only called if it's defined. This prevents the error message you're seeing. For more information, refer to the Refine Discord support thread (https://discord.com/channels/837692625737613362/1131579446877487135) and the Refine blog post on common useState mistakes (https://refine.dev/blog/common-usestate-mistakes-and-how-to-avoid/). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•14mo ago

<@369510721135837184> kapa.ai is still learning and improving, please let us know how it did by reacting below

other-emeraldOP•14mo ago

@kapa.ai now I can get the role, thank you. Here is the next requirement. I have 3 role with these action admin -> view, insert, update, delete editor -> view,insert,update reador -> view How can set these action for each role?

kapa.ai•14mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- To set these actions for each role, you can use the accessControlProvider prop in the Refine component. This prop accepts an object with a can method, which is used to control whether the requested access is granted. This method takes resource and action as parameters. You can use a library like Casbin to define and enforce your access control policies. Here's an example of how you can define a model and a policy for a role:

import { newModel, StringAdapter } from "casbin";  
  
export const model = newModel(`  
[request_definition]  
r = sub, obj, act  
  
[policy_definition]  
p = sub, obj, act  
  
[role_definition]  
g = _, _  
  
[policy_effect]  
e = some(where (p.eft == allow))  
  
[matchers]  
m = g(r.sub, p.sub) && keyMatch(r.obj, p.obj) && regexMatch(r.act, p.act)  
`);  
  
export const adapter = new StringAdapter(`  
p, admin, *, *  
p, editor, *, view
p, editor, *, insert
p, editor, *, update
p, reader, *, view
`);

import { newModel, StringAdapter } from "casbin";  
  
export const model = newModel(`  
[request_definition]  
r = sub, obj, act  
  
[policy_definition]  
p = sub, obj, act  
  
[role_definition]  
g = _, _  
  
[policy_effect]  
e = some(where (p.eft == allow))  
  
[matchers]  
m = g(r.sub, p.sub) && keyMatch(r.obj, p.obj) && regexMatch(r.act, p.act)  
`);  
  
export const adapter = new StringAdapter(`  
p, admin, *, *  
p, editor, *, view
p, editor, *, insert
p, editor, *, update
p, reader, *, view
`);

In this example, the admin role has access to all actions (*), the editor role has access to view, insert, and update actions, and the reader role only has access to view action. Then, you can implement the can method for accessControlProvider:

import { newEnforcer } from "casbin";  
import { model, adapter } from "./accessControl";  
  
const App: React.FC = () => {  
 return (  
 <BrowserRouter>  
 <Refine  
 accessControlProvider={{  
 can: async ({ resource, action }) => {  
 const enforcer = await newEnforcer(model, adapter);  
 const role = await authProvider.getPermissions();
 const can = await enforcer.enforce(  
 role,  
 resource,  
 action,  
 );  
  
 return { can };  
 },  
 }}  
 //...  
 >  
 {/* ... */}  
 </Refine>  
 </BrowserRouter>  
 );  
};

import { newEnforcer } from "casbin";  
import { model, adapter } from "./accessControl";  
  
const App: React.FC = () => {  
 return (  
 <BrowserRouter>  
 <Refine  
 accessControlProvider={{  
 can: async ({ resource, action }) => {  
 const enforcer = await newEnforcer(model, adapter);  
 const role = await authProvider.getPermissions();
 const can = await enforcer.enforce(  
 role,  
 resource,  
 action,  
 );  
  
 return { can };  
 },  
 }}  
 //...  
 >  
 {/* ... */}  
 </Refine>  
 </BrowserRouter>  
 );  
};

In this example, the can method uses a newEnforcer function from Casbin to enforce the access control rules based on the user's role, resource, and action. For more information, refer to the Refine Discord support thread (https://discord.com/channels/837692625737613362/1164521918926442576) and the Refine blog post on implementing Role Based Access Control (https://refine.dev/blog/refine-pixels-6/). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•14mo ago

<@369510721135837184> kapa.ai is still learning and improving, please let us know how it did by reacting below