optimistic-gold•6mo ago

Acces Control using Casbin and Antd

import { newModel, StringAdapter } from "casbin";

export const model = newModel(`
[request_definition]
r = sub, obj, act

[policy_definition]
p = sub, obj, act, eft

[role_definition]
g = _, _

[policy_effect]
e = some(where (p.eft == allow)) && !some(where (p.eft == deny))

[matchers]
m = g(r.sub, p.sub) && keyMatch(r.obj, p.obj) && regexMatch(r.act, p.act)
`);

export const adapter = new StringAdapter(`
p, admin, posts, (list)|(create)
p, admin, posts/*, (edit)|(show)|(delete)
p, admin, posts/*, field

p, admin, users, (list)|(create)
p, admin, users/*, (edit)|(show)|(delete)

p, admin, categories, (list)|(create)
p, admin, categories/*, (edit)|(show)|(delete)

p, editor, posts, (list)|(create)
p, editor, posts/*, (edit)|(show)
p, editor, posts/hit, field, deny

p, editor, categories, list

`);

import { newModel, StringAdapter } from "casbin";

export const model = newModel(`
[request_definition]
r = sub, obj, act

[policy_definition]
p = sub, obj, act, eft

[role_definition]
g = _, _

[policy_effect]
e = some(where (p.eft == allow)) && !some(where (p.eft == deny))

[matchers]
m = g(r.sub, p.sub) && keyMatch(r.obj, p.obj) && regexMatch(r.act, p.act)
`);

export const adapter = new StringAdapter(`
p, admin, posts, (list)|(create)
p, admin, posts/*, (edit)|(show)|(delete)
p, admin, posts/*, field

p, admin, users, (list)|(create)
p, admin, users/*, (edit)|(show)|(delete)

p, admin, categories, (list)|(create)
p, admin, categories/*, (edit)|(show)|(delete)

p, editor, posts, (list)|(create)
p, editor, posts/*, (edit)|(show)
p, editor, posts/hit, field, deny

p, editor, categories, list

`);

i have few question about this access control using casbin and antd design: 1. is there any way to make the menu disapear instead of disabled when some role can't acces it? 2. in the example i realize that editor role can't see hit field in the posts list. I thought it related to "p, editor, posts/hit, field, deny" but when i delete the code it still not show up in the editor view? How to hide certain field for certain role? 3. i hope further explaination about how this two code work "p, admin, posts/*, field" and "p, editor, posts/hit, field, deny"

5 Replies

kapa.ai•6mo ago

Hi @M Farhan Zachary. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To address your questions about access control using Casbin and Ant Design in a Refine application, let's break down each query: 1. Making the Menu Disappear Instead of Disabled To make the menu items disappear instead of just being disabled when a role can't access them, you can use the useCan hook provided by Refine. This hook allows you to check permissions and conditionally render components based on the access control policies. Here's an example of how you can conditionally render a menu item:

import { useCan } from "@refinedev/core";
import { Menu } from "antd";

const MyMenu = () => {
  const { data: canAccessPosts } = useCan({
    resource: "posts",
    action: "list",
  });

  return (
    <Menu>
      {canAccessPosts?.can && (
        <Menu.Item key="posts">
          Posts
        </Menu.Item>
      )}
      {/* Add other menu items similarly */}
    </Menu>
  );
};

import { useCan } from "@refinedev/core";
import { Menu } from "antd";

const MyMenu = () => {
  const { data: canAccessPosts } = useCan({
    resource: "posts",
    action: "list",
  });

  return (
    <Menu>
      {canAccessPosts?.can && (
        <Menu.Item key="posts">
          Posts
        </Menu.Item>
      )}
      {/* Add other menu items similarly */}
    </Menu>
  );
};

2. Hiding Certain Fields for Certain Roles To hide certain fields for specific roles, you need to handle the field action in the can method of your accessControlProvider. The example you provided already includes this logic. Ensure that the useCan hook is used correctly in the component where the field is rendered. Here's an example of how to use the useCan hook to conditionally render a field in a table:

import { useCan } from "@refinedev/core";
import { Table } from "antd";

export const PostList: React.FC = () => {
  const { data: canAccessHitField } = useCan({
    resource: "posts",
    action: "field",
    params: { field: "hit" },
  });
return (
    <Table rowKey="id">
      {canAccessHitField?.can && (
        <Table.Column
          dataIndex="hit"
          title="Hit"
          render={(value: number) => (
            <NumberField value={value} options={{ notation: "compact" }} />
          )}
        />
      )}
      {/* Add other columns similarly */}
    </Table>
  );
};

import { useCan } from "@refinedev/core";
import { Table } from "antd";

export const PostList: React.FC = () => {
  const { data: canAccessHitField } = useCan({
    resource: "posts",
    action: "field",
    params: { field: "hit" },
  });
return (
    <Table rowKey="id">
      {canAccessHitField?.can && (
        <Table.Column
          dataIndex="hit"
          title="Hit"
          render={(value: number) => (
            <NumberField value={value} options={{ notation: "compact" }} />
          )}
        />
      )}
      {/* Add other columns similarly */}
    </Table>
  );
};

3. Explanation of Policy Lines - p, admin, posts/*, field: This policy line allows the admin role to access any field (field action) of the posts resource. The * wildcard means it applies to all fields within the posts resource. - p, editor, posts/hit, field, deny: This policy line explicitly denies the editor role access to the hit field of the posts resource. The deny effect overrides any other allow policies that might apply to the editor role for this specific field. Summary - To make menu items disappear, use the useCan hook to conditionally render them. - To hide fields for certain roles, ensure the field action is handled in the can method and use the useCan hook in your components. - The policy lines define what actions are allowed or denied for specific roles and resources, with the deny effect taking precedence over allow. For more detailed information, you can refer to the Refine Access Control Provider documentation (https://refine.dev/docs/authorization/access-control-provider/) and the Casbin documentation (https://casbin.org/docs/how-it-works). If you need further assistance, feel free to ask! ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•6mo ago

<@757407865391808603> kapa.ai is still learning and improving, please let us know how it did by reacting below

optimistic-goldOP•6mo ago

@kapa.ai is there any more efficient way to make menu disapear instead of disabled?

kapa.ai•6mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- To efficiently make menu items disappear instead of being disabled, you can leverage Refine's built-in capabilities for handling authorization and menu visibility. Refine provides a streamlined way to manage the visibility of menu items based on user permissions without requiring manual checks for each item. Using meta.hide Property Refine allows you to hide resources in the Sider by using the meta.hide property. This property can be set in the resource definition, and it will automatically hide the resource from the menu if the user does not have the necessary permissions. Here's an example of how to use the meta.hide property:

import { Refine } from "@refinedev/core";
import { dataProvider, authProvider } from "./providers";

const App = () => (
  <Refine
    dataProvider={dataProvider}
    authProvider={authProvider}
    resources={[
      {
        name: "posts",
        list: PostList,
        meta: { hide: !canAccessPosts },
      },
      {
        name: "users",
        list: UserList,
        meta: { hide: !canAccessUsers },
      },
      // Add other resources similarly
    ]}
  />
);

import { Refine } from "@refinedev/core";
import { dataProvider, authProvider } from "./providers";

const App = () => (
  <Refine
    dataProvider={dataProvider}
    authProvider={authProvider}
    resources={[
      {
        name: "posts",
        list: PostList,
        meta: { hide: !canAccessPosts },
      },
      {
        name: "users",
        list: UserList,
        meta: { hide: !canAccessUsers },
      },
      // Add other resources similarly
    ]}
  />
);

Using useMenu Hook with hideOnMissingParameter Another efficient way is to use the useMenu hook with the hideOnMissingParameter property. This property ensures that menu items requiring additional parameters are hidden if those parameters are missing. Here's an example:

import { useMenu } from "@refinedev/core";
import { Menu } from "antd";

const MyMenu = () => {
  const { menuItems } = useMenu({
    hideOnMissingParameter: true,
  });

  return (
    <Menu>
      {menuItems.map((item) => (
        <Menu.Item key={item.key}>
          {item.label}
        </Menu.Item>
      ))}
    </Menu>
  );
};

import { useMenu } from "@refinedev/core";
import { Menu } from "antd";

const MyMenu = () => {
  const { menuItems } = useMenu({
    hideOnMissingParameter: true,
  });

  return (
    <Menu>
      {menuItems.map((item) => (
        <Menu.Item key={item.key}>
          {item.label}
        </Menu.Item>
      ))}
    </Menu>
  );
};

Summary - Using meta.hide Property: This property can be set in the resource definition to automatically hide resources from the menu based on user permissions. - Using useMenu Hook with hideOnMissingParameter: This property ensures that menu items requiring additional parameters are hidden if those parameters are missing. For more detailed information, you can refer to the Refine documentation on hiding resources (https://refine.dev/docs/core/refine-component/#hide) and the useMenu hook properties (https://refine.dev/docs/core/hooks/utilities/use-menu/#properties-1). These methods provide a more efficient and streamlined way to manage menu visibility based on user permissions in a Refine application. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•6mo ago

<@757407865391808603> kapa.ai is still learning and improving, please let us know how it did by reacting below