environmental-rose•2y ago

how to limit table to only show logged in users posts

I have a field in posts that connects users (Relation with User (from: users-permissions)) to the posts, when i pull up the list of the posts it shows every user all posts and allows them to edit them. How can I make it so the users only have access to the posts that have a relationship to them and can only edit those posts no other post?

8 Replies

kapa.ai•2y ago

Hi @erekyu. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- In refine, you can control access to resources using the accessControlProvider and its can method. This method is used to check if the user has the necessary permissions to perform a certain action on a resource. In your case, you want to restrict users to only edit the posts that have a relationship with them. You can achieve this by implementing a custom logic in the can method of your accessControlProvider. Here is a basic example of how you can implement this:

const accessControlProvider = {  
 can: async ({ resource, action, params }) => {  
  if (resource === "posts" && action === "edit") {  
   const userRole = getUserRole();  
   const userId = getUserId(); // You need to implement this function to get the current user's ID
   const postUserId = getPostUserId(params.id); // You need to implement this function to get the user ID related to the post

   if (userRole === "admin" || userId === postUserId) {  
    return { can: true };  
   }  
  
   return Promise.resolve({  
    can: false,  
    reason: "Unauthorized",  
   });  
  }  
  
  return Promise.resolve({ can: true });  
 },  
};

const accessControlProvider = {  
 can: async ({ resource, action, params }) => {  
  if (resource === "posts" && action === "edit") {  
   const userRole = getUserRole();  
   const userId = getUserId(); // You need to implement this function to get the current user's ID
   const postUserId = getPostUserId(params.id); // You need to implement this function to get the user ID related to the post

   if (userRole === "admin" || userId === postUserId) {  
    return { can: true };  
   }  
  
   return Promise.resolve({  
    can: false,  
    reason: "Unauthorized",  
   });  
  }  
  
  return Promise.resolve({ can: true });  
 },  
};

In this example, getUserRole, getUserId, and getPostUserId are hypothetical functions that you would need to implement according to your application's logic. getUserRole should return the role of the current user, getUserId should return the ID of the current user, and getPostUserId should return the ID of the user related to the post. Then, you can use this accessControlProvider in your Refine component:

const App: React.FC = () => {  
 <Refine  
 accessControlProvider={accessControlProvider}  
 />;  
};

const App: React.FC = () => {  
 <Refine  
 accessControlProvider={accessControlProvider}  
 />;  
};

Please note that this is a basic example and you might need to adjust it according to your needs. For more information, you can refer to the refine documentation (https://refine.dev/docs/advanced-tutorials/access-control) and this blog post (https://refine.dev/blog/build-internal-tools-using-low-code-with-refine). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2y ago

<@66380739771379712> kapa.ai is still learning and improving, please let us how it did by reacting below

environmental-roseOP•2y ago

@kapa.ai we are using casbin for our auth, is their a way to limit users access to only their posts with casbin?

kapa.ai•2y ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Yes, you can limit users' access to only their posts using Casbin in refine. Casbin uses a model to define access control policies. You can define a policy where a user (subject) can only edit (action) their own posts (object). Here's a basic example of how you can define such a policy:

export const adapter = new StringAdapter(`  
 p, {userId}, posts, edit  
`);

export const adapter = new StringAdapter(`  
 p, {userId}, posts, edit  
`);

In this example, {userId} should be replaced with the actual ID of the user. This policy states that a user with the ID {userId} can edit their posts. Then, in your accessControlProvider, you can use the enforce method of the Casbin enforcer to check if a user has the necessary permissions:

export const accessControlProvider = {  
 can: async ({ resource, action }: CanParams): Promise<CanReturnType> => {  
 const role = await authProvider.getPermissions();  
  
 const enforcer = await newEnforcer(model, adapter);  
 const can = await enforcer.enforce(role, resource, action);  
  
 return Promise.resolve({  
 can,  
 });  
 }  
};

export const accessControlProvider = {  
 can: async ({ resource, action }: CanParams): Promise<CanReturnType> => {  
 const role = await authProvider.getPermissions();  
  
 const enforcer = await newEnforcer(model, adapter);  
 const can = await enforcer.enforce(role, resource, action);  
  
 return Promise.resolve({  
 can,  
 });  
 }  
};

In this example, authProvider.getPermissions() should return the role of the current user, which should be their user ID in this case. Please note that this is a basic example and you might need to adjust it according to your needs. For more information, you can refer to the refine documentation (https://refine.dev/docs/advanced-tutorials/access-control) and this blog post (https://refine.dev/blog/refine-pixels-6). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2y ago

<@66380739771379712> kapa.ai is still learning and improving, please let us how it did by reacting below

environmental-roseOP•2y ago

@kapa.ai how does casebin know what posts are the users if we are just checking the users id against a post how would it know to look for the relationship to find the users id to be able to match it?

kapa.ai•2y ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Casbin itself doesn't know about the relationships between users and posts. It only checks if a user (subject) has permission to perform an action on an object based on the policies you define. To implement a feature where users can only edit their own posts, you would need to handle the logic of checking if a post belongs to a user in your application code. When a user tries to edit a post, you would first check if the user is the owner of the post. If they are, you would then use Casbin to check if the user has permission to edit posts. Here's a basic example of how you can implement this:

const canEditPost = async (userId, postId) => {
  // Check if the post belongs to the user
  const post = await getPost(postId); // You need to implement this function
  if (post.userId !== userId) {
    return false;
  }

  // Check if the user has permission to edit posts
  const enforcer = await newEnforcer(model, adapter);
  const can = await enforcer.enforce(userId, 'posts', 'edit');

  return can;
};

const canEditPost = async (userId, postId) => {
  // Check if the post belongs to the user
  const post = await getPost(postId); // You need to implement this function
  if (post.userId !== userId) {
    return false;
  }

  // Check if the user has permission to edit posts
  const enforcer = await newEnforcer(model, adapter);
  const can = await enforcer.enforce(userId, 'posts', 'edit');

  return can;
};

In this example, getPost is a hypothetical function that you would need to implement. It should return the post with the given ID, including the ID of the user who owns the post. Please note that this is a basic example and you might need to adjust it according to your needs. For more information, you can refer to the refine documentation (https://refine.dev/docs/advanced-tutorials/access-control) and this blog post (https://refine.dev/blog/refine-pixels-6). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2y ago

<@66380739771379712> kapa.ai is still learning and improving, please let us how it did by reacting below

how to limit table to only show logged in users posts

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