like-gold•4mo ago

How can re-init accessControlProvider ?

``import { CanParams, CanReturnType } from "@refinedev/core";
const user = localStorage.getItem("user");
export const canPMP = async ({ resource, action, params }: CanParams): Promise<CanReturnType> => {
  const myProductRole = localStorage.getItem("myProductRole");
  console.log({ myProductRole });

  if (resource === "user" && action === "add") {
    return {
      can: true,
    };
  }
  return { can: false };
};

My App started at studio resource.

myProductRole has value once I navigated to product resource, but when I try to console.log it always null. How can I trigger can` fn to get new value in localStorage?

6 Replies

kapa.ai•4mo ago

Hi @tingadev. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- The can function in your accessControlProvider is not reactive to changes in localStorage. It doesn't automatically re-run when the value in localStorage changes. To achieve this, you might need to force a re-render of your component or find a way to re-run the can function when the localStorage value changes. However, the provided knowledge sources do not contain specific information on how to re-initiate the accessControlProvider or how to make it reactive to changes in localStorage. For more detailed guidance, you may want to refer to the official Refine documentation (https://refine.dev/docs/authorization/access-control-provider). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4mo ago

<@761921731505946634> kapa.ai is still learning and improving, please let us know how it did by reacting below

like-gold•4mo ago

@kapa.ai how to re-run the can function ?

kapa.ai•4mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- The can function is used by Refine's useCan hook and <CanAccess /> component. It's not designed to be manually re-run. Instead, it's automatically called when the useCan hook or <CanAccess /> component is used. If you want to re-run the can function, you would typically need to cause a re-render of the component that's using the useCan hook or <CanAccess /> component. This could be done by changing the state of the component or its props. Here's an example of how you might use state to cause a re-render:

import { useState, useEffect } from 'react';
import { useCan } from "@refinedev/core";

const MyComponent = () => {
  const [myProductRole, setMyProductRole] = useState(localStorage.getItem("myProductRole"));

  useEffect(() => {
    const role = localStorage.getItem("myProductRole");
    setMyProductRole(role);
  }, []);

  const { data: canAddUser } = useCan({
    action: "add",
    resource: "user",
  });

  // rest of your component
};

import { useState, useEffect } from 'react';
import { useCan } from "@refinedev/core";

const MyComponent = () => {
  const [myProductRole, setMyProductRole] = useState(localStorage.getItem("myProductRole"));

  useEffect(() => {
    const role = localStorage.getItem("myProductRole");
    setMyProductRole(role);
  }, []);

  const { data: canAddUser } = useCan({
    action: "add",
    resource: "user",
  });

  // rest of your component
};

In this example, the useEffect hook is used to update the myProductRole state whenever the component mounts. This will cause a re-render of the component, which in turn will cause the useCan hook to re-run the can function. However, this will only re-run the can function when the component mounts, not when the localStorage value changes. To make it reactive to changes in localStorage, you would need to set up an event listener for the storage event, which is fired when the localStorage is changed. This is not covered in the provided knowledge sources, so you may need to refer to the React documentation (https://reactjs.org/docs/hooks-effect.html) or other resources for more information on how to do this. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4mo ago

<@761921731505946634> kapa.ai is still learning and improving, please let us know how it did by reacting below

like-gold•4mo ago

@kapa.ai How to I customize AccessControlContext ? @kapa.ai How to I customize AccessControlContext ?