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Add grouping policies to server response for RBAC multi-role support #302

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Add grouping policies to server response for RBAC multi-role support #302

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Initial plan
Copilot Feb 1, 2026
8328a27
Add support for multiple roles per user in casbin.js
Copilot Feb 1, 2026
78d04aa
Add documentation for RBAC and multiple roles support
Copilot Feb 1, 2026
51e74a1
Address code review feedback - refactor duplicated code and improve n…
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21 changes: 21 additions & 0 deletions README.md
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Expand Up @@ -58,6 +58,27 @@ await authorizer.setUser("Tom");
authorizer.can("read", "data1").then();
```

## RBAC and Multiple Roles Support

Casbin.js supports Role-Based Access Control (RBAC) including scenarios where a user has multiple roles. When using `auto` mode, the backend service should return both regular policies (`p` rules) and grouping policies (`g` rules) that define role assignments.

Example backend response for a user with multiple roles:
```javascript
{
"m": "<casbin model configuration>",
"p": [
["p", "admin", "data1", "read"],
["p", "admin", "data1", "write"],
["p", "editor", "data2", "read"],
["p", "editor", "data2", "write"],
["g", "alice", "admin"], // Alice has admin role
["g", "alice", "editor"] // Alice also has editor role
]
}
```

With this configuration, user "alice" will have permissions from both the `admin` and `editor` roles, allowing her to access both `data1` and `data2`.

More functionalities of Casbin.js are still under development. Feel free to raise issues to share your features suggestions!

## TODO MAP
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