diff --git a/ent/migrate/schema.go b/ent/migrate/schema.go
index 4e3cd0e..81afb20 100644
--- a/ent/migrate/schema.go
+++ b/ent/migrate/schema.go
@@ -24,6 +24,13 @@ var (
 		Name:       "casbin_rules",
 		Columns:    CasbinRulesColumns,
 		PrimaryKey: []*schema.Column{CasbinRulesColumns[0]},
+		Indexes: []*schema.Index{
+			{
+				Name:    "casbinrule_ptype_v0_v1_v2_v3_v4_v5",
+				Unique:  true,
+				Columns: []*schema.Column{CasbinRulesColumns[1], CasbinRulesColumns[2], CasbinRulesColumns[3], CasbinRulesColumns[4], CasbinRulesColumns[5], CasbinRulesColumns[6], CasbinRulesColumns[7]},
+			},
+		},
 	}
 	// Tables holds all the tables in the schema.
 	Tables = []*schema.Table{
diff --git a/ent/schema/casbinrule.go b/ent/schema/casbinrule.go
index 4c87380..a055e2f 100644
--- a/ent/schema/casbinrule.go
+++ b/ent/schema/casbinrule.go
@@ -29,7 +29,7 @@ func (CasbinRule) Edges() []ent.Edge {
 	return nil
 }
 
-func (CasbinRule) Index() []ent.Index {
+func (CasbinRule) Indexes() []ent.Index {
 	return []ent.Index{
 		index.Fields("Ptype", "V0", "V1", "V2", "V3", "V4", "V5").Unique(),
 	}