national-gold•6mo ago

RBAC using casbin

I was implementing rbac in my refine+supabase application. In Casbin Model and Policies file, what is resources/ objects there.

11 Replies

kapa.ai•6mo ago

Hi @venom. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- In the context of Casbin and Role-Based Access Control (RBAC), resources or objects refer to the entities in your application that you want to control access to. These could be various parts of your application like pages, routes, or data entities. In the Casbin model and policies file shared in the knowledge source (https://refine.dev/blog/refine-pixels-6#casbin-model-and-policies), the resources are represented by the obj variable in the model definition. Here's the model definition for reference:

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 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)  
`);

In this model, r = sub, obj, act is the request definition where sub is the subject (usually the user or role), obj is the object or resource, and act is the action. Casbin uses this model to scan the request for the subject, object, and action. The policy adapter then holds instances of policies produced from p. The policies define what actions (act) a subject (sub) can perform on a resource (obj). For example, in the policy p, admin, users, list, admin is the subject, users is the resource, and list is the action. This policy allows an admin to list users. So, in your application, the resources or objects would be whatever entities you want to control access to, and you would define your Casbin model and policies accordingly. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•6mo ago

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national-gold•6mo ago

@kapa.ai where can i find objects in my application

kapa.ai•6mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- In a Refine application, objects or resources typically refer to the data entities that your application is built around. These are usually defined in the resources prop of the <Refine /> component in your App.tsx file. For example, in a blog application, your resources might be posts and authors. In an e-commerce application, your resources might be products, orders, and customers. Here's an example of how resources are defined in a Refine application:

<Refine  
 resources={[  
 {  
 name: "posts",  
 list: "/posts",  
 create: "/posts/create",  
 edit: "/posts/edit/:id",  
 },  
 {  
 name: "authors",  
 list: "/authors",  
 create: "/authors/create",  
 edit: "/authors/edit/:id",  
 },  
 ]}  
/>

<Refine  
 resources={[  
 {  
 name: "posts",  
 list: "/posts",  
 create: "/posts/create",  
 edit: "/posts/edit/:id",  
 },  
 {  
 name: "authors",  
 list: "/authors",  
 create: "/authors/create",  
 edit: "/authors/edit/:id",  
 },  
 ]}  
/>

In this example, posts and authors are the resources or objects in the application. The list, create, and edit properties define the actions that can be performed on these resources, and the corresponding routes in the application. You can find more examples in the knowledge sources (https://refine.dev/blog/refine-pixels-3#adding-resources-to-refine-, https://refine.dev/blog/refine-pixels-3#refine-s-resources-prop, https://refine.dev/blog/react-admin-frameworks-refine-vs-blitz-js#refine-5, https://refine.dev/blog/refine-react-invoice-generator-2#project-setup, https://refine.dev/blog/refine-react-invoice-generator-2#exploring-the-app, https://refine.dev/blog/react-crud-app-with-dynamic-form-ant-design#project-setup, https://refine.dev/docs/data/packages/supabase#adding-resources). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•6mo ago

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national-gold•6mo ago

@kapa.ai ok so for the above posts and author resources, what will be the plicy file look like

kapa.ai•6mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- In the context of Casbin and your application with posts and authors resources, your policy file might look something like this:

p, admin, posts, (list|create|edit|delete)
p, admin, authors, (list|create|edit|delete)
p, editor, posts, (list|create|edit)
p, editor, authors, list

p, admin, posts, (list|create|edit|delete)
p, admin, authors, (list|create|edit|delete)
p, editor, posts, (list|create|edit)
p, editor, authors, list

In this example, the admin role has permission to list, create, edit, and delete both posts and authors. The editor role can list, create, and edit posts, but can only list authors. The format of each line is p, sub, obj, act, where p denotes a policy, sub is the subject (the role in this case), obj is the object or resource, and act is the action. The actions are separated by | to indicate that any of these actions are allowed. Please note that this is a basic example. The actual policies would depend on the specific access control requirements of your application. You might have more roles, more resources, and more specific actions. You might also have different policies for different instances of a resource, for example, based on who created a post. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•6mo ago

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national-gold•6mo ago

@kapa.ai why cant i see the options in my sidebar after implementing rbac

kapa.ai•6mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- There could be several reasons why you're not seeing the options in your sidebar after implementing Role-Based Access Control (RBAC). Here are a few possibilities: 1. Access Control Provider: The Access Control Provider is not correctly set up. Refine uses the Access Control Provider to determine which resources a user can access. If the provider is not correctly configured, some resources might not appear in the sidebar. You can check the Access Control Provider documentation (https://refine.dev/docs/guides-concepts/general-concepts#ui-integrations-1) for more information. 2. Access Control Points: Refine checks for access control at certain points in the application. For the sidebar, it checks with { resource, action: "list" }. If your access control policies do not allow the list action for a resource, that resource will not appear in the sidebar. You can check the List of Default Access Control Points documentation (https://refine.dev/docs/authorization/access-control-provider#list-of-default-access-control-points) for more information. 3. Resource Visibility: Resources have a visible or hide option that determines whether they appear in the sidebar. If this option is set to false or true respectively, the resource will not appear in the sidebar, regardless of the access control policies. You can check the Github Issue (closed): [FEAT] Add an option to hide the resource in the menu (https://github.com/refinedev/refine/issues/2388) for more information. 4. Bugs: There might be a bug in Refine or in your code. For example, there was a bug (https://github.com/refinedev/refine/issues/4852) where inaccessible resources still showed up on the sidebar. If you think you've encountered a bug, you can report it on the Refine Github repository (https://github.com/refinedev/refine/issues). If none of these possibilities solve your issue, you might want to ask for help on the Refine Discord server (https://discord.com/channels/837692625737613362/1163896436069519390). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•6mo ago

<@1090629145681215550> kapa.ai is still learning and improving, please let us know how it did by reacting below