Upgrade to Casbin v3

[Copilot]

The adapter was using Casbin v2 dependencies, causing interface type mismatches when used with Casbin v3 enforcers:

panic: interface conversion: *xormadapter.Adapter is not persist.Adapter: missing method LoadPolicy

Changes

• Dependencies: github.com/casbin/casbin/v2 → v3
• API compatibility: Handle GetPolicy() now returning ([][]string, error) in tests
• Documentation: Update README examples to show v3 imports

The adapter implementation required no changes - all persist.Adapter methods were already present. The issue was purely an import path mismatch between v2 and v3 type systems.

Usage

import (
    "github.com/casbin/casbin/v3"
    xormadapter "github.com/casbin/xorm-adapter/v3"
)

adapter, _ := xormadapter.NewAdapterByEngineWithTableName(engine, "policy", "t_")
enforcer, _ := casbin.NewSyncedCachedEnforcer(modelFile, adapter)

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• go.googlesource.com
  • Triggering command: /update-job-proxy /update-job-proxy ut-80144385.c -fmessage-length--source-root ache/go/1.24.12//home/REDACTED/work/xorm-adapter/xorm-adapter -E 1997253/b181/_pkg_.a ctor ache/go/1.24.12/x64/pkg/tool/linux_amd64/vet ache/go/1.24.12/git r/goleveldb/leverev-parse -fno-stack-proteFETCH_HEAD ache/go/1.24.12/x64/pkg/tool/linux_amd64/vet (dns block)
  • Triggering command: /update-job-proxy /update-job-proxy DROP /usr/bin/dirnameextensions.objectformat test -e stitutions_ECC_RootCA_2015.pem dirname /opt/go/bin/test (dns block)
• xorm.io
  • Triggering command: /update-job-proxy /update-job-proxy ut-80144385.c -fmessage-length--source-root ache/go/1.24.12//home/REDACTED/work/xorm-adapter/xorm-adapter -E 1997253/b181/_pkg_.a ctor ache/go/1.24.12/x64/pkg/tool/linux_amd64/vet ache/go/1.24.12/git r/goleveldb/leverev-parse -fno-stack-proteFETCH_HEAD ache/go/1.24.12/x64/pkg/tool/linux_amd64/vet (dns block)
  • Triggering command: /update-job-proxy /update-job-proxy DROP /usr/bin/dirnameextensions.objectformat test -e stitutions_ECC_RootCA_2015.pem dirname /opt/go/bin/test (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Are there any plans for xorm-adapter to support Casbin v3?</issue_title>
<issue_description>To use the xorm-adapter in Casbin v3, do the following:

	adapter, err := xormadapter.NewAdapterByEngineWithTableName(database.OrmDb, "ram_policy", "t_")
	if err != nil {
		return enforcer, err
	}
	super, err := s.getSuperAdminRoleId()
	if err != nil {
		return enforcer, err
	}
	modelfile, err := s.defaultModel(super, defaultDataTagWhenInter)
	if err != nil {
		return enforcer, err
	}
	enforcer, err = casbin.NewSyncedCachedEnforcer(modelfile, adapter)

The following error was returned:

panic: interface conversion: *xormadapter.Adapter is not persist.Adapter: missing method LoadPolicy
```</issue_description>

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

• Fixes Are there any plans for xorm-adapter to support Casbin v3? #69

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}