Policy Storage

Policy storage in Casbin is handled by adapters. The enforcer loads and (optionally) saves policy through the adapter API.

Loading policy from a CSV file

Using a CSV file is the simplest option and works well for development and examples.

Example: examples/rbac_policy.csv

p, alice, data1, read
p, bob, data2, write
p, data2_admin, data2, read
p, data2_admin, data2, write
g, alice, data2_admin

catatan

If a field contains commas, wrap it in double quotes:

p, alice, "data1,data2", read    --correct
p, alice, data1,data2, read        --incorrect (the whole phrase "data1,data2" should be wrapped in double quotes)

If a field contains both commas and double quotes, wrap it in double quotes and escape internal quotes by doubling them:

p, alice, data, "r.act in (""get"", ""post"")"        --correct
p, alice, data, "r.act in ("get", "post")"            --incorrect (you should use "" to escape "")

See casbin#886.

API Adaptor

Metode	Jenis	Deskripsi
LoadPolicy()	dasar	Memuat semua aturan kebijakan dari penyimpanan
SavePolicy()	dasar	Menyimpan semua aturan kebijakan ke penyimpanan
AddPolicy()	opsional	Tambahkan aturan kebijakan ke penyimpanan
RemovePolicy()	opsional	Hapus aturan kebijakan dari penyimpanan
RemoveFilteredPolicy()	opsional	Hapus aturan kebijakan yang sesuai dengan filter dari penyimpanan

Format Penyimpanan Basis Data

Example policy (CSV)

p, data2_admin, data2, read
p, data2_admin, data2, write
g, alice, admin

Typical database layout (e.g. MySQL)

id	ptype	v0	v1	v2	v3	v4	v5
1	p	data2_admin	data2	baca
2	p	data2_admin	data2	menulis
3	g	alice	admin

Columns

• id — Primary key (adapter-specific; not part of Casbin policy).
• ptype — Policy type: p, g, g2, etc.
• v0–v5 — Policy fields in order (left to right in CSV). Most adapters use 6 columns; some support more. Check the adapter docs if you need extra fields.

For full adapter API and design details, see Adapters.