How to fix “permission denied” error in Supabase?

 

Step 1: Identify the Error Context

 

Before attempting to fix the "permission denied" error in Supabase, it's crucial to identify where the error is occurring. This could be during database operations, API requests, or storage access. Check the logs or error messages to get precise information about which area needs intervention.

 

Step 2: Check Supabase Role Permissions

 

Supabase uses PostgreSQL role-based access control. Ensure that the role being used has the correct permissions for the operation you are trying to execute.

1. Access the Supabase Dashboard:
   Go to your Supabase project dashboard.

2. Navigate to the 'Database' Tab:
   Under the database tab, locate the 'SQL editor'.

3. Verify Role Permissions:
   Use the SQL editor to check permissions for your role.

   
   SELECT \* FROM information_schema.role_table_grants WHERE grantee = 'your_role\_name';
   

   Replace 'your_role_name' with the actual role name you are using.

 

Step 3: Modify Role Permissions if Needed

 

If you find that the role does not have the necessary permissions, you can alter the permissions via SQL.

1. Grant Permissions:
   Use the SQL editor to update role permissions.

   
   GRANT SELECT, INSERT, UPDATE ON TABLE your_table TO your_role\_name;
   

   Replace 'your_table' and 'your_role_name' with your specific table and role.

2. Revoke Permissions if Necessary:
   If you need to remove certain permissions, use:

   
   REVOKE DELETE ON TABLE your_table FROM your_role\_name;
   

 

Step 4: Review and Update API Policies

 

Check if there are any policies related to your API requests that might cause permission issues.

1. Navigate to 'Auth' Section:
   In your Supabase dashboard, go to the 'Auth' section to verify policy settings.

2. Check API Key:
   Ensure that you are using the correct API key that matches your environment's permission settings.

 

Step 5: Review Storage Permissions

 

If your "permission denied" error relates to storage, check the storage policies.

1. Access the 'Storage' Section:
   In the Supabase dashboard, navigate to 'Storage'.

2. Review Storage Policies:
   Check and modify the storage policies to ensure the correct permission for file uploads or downloads.

 

Step 6: Test Changes

 

Once changes have been made, test the application to verify if the permission issues are resolved.

1. Re-run Your Operation:
   Conduct the operation that was previously causing the "permission denied" error.

2. Monitor Logs:
   Keep an eye on the application logs to confirm that the permission error is no longer present.

Following these steps should resolve the "permission denied" error in Supabase. If issues persist, consider reaching out to Supabase support for further assistance.