fix: add empty policy check in SavePolicy function.

tson1111 · tson1111 · commit 1a949104d251 · 2021-05-13T19:31:58.000+08:00
Signed-off-by: Cong Ding &lt;masdc98@icloud.com&gt;
diff --git a/adapter.go b/adapter.go
@@ -327,6 +327,11 @@ func (a *Adapter) SavePolicy(model model.Model) error {
 		}
 	}
 
+	// check whether the policy is empty
+	if len(lines) == 0 {
+		return nil
+	}
+
 	_, err = a.engine.Insert(&lines)
 
 	return err

Original file line number	Diff line number	Diff line change
`@@ -327,6 +327,11 @@ func (a *Adapter) SavePolicy(model model.Model) error {`
`327`	`327`	`}`
`328`	`328`	`}`
`329`	`329`
	`330`	`+ // check whether the policy is empty`
	`331`	`+ if len(lines) == 0 {`
	`332`	`+ return nil`
	`333`	`+ }`
	`334`	`+`
`330`	`335`	`_, err = a.engine.Insert(&lines)`
`331`	`336`
`332`	`337`	`return err`