fix bug

services/knowoapi/services/rule_chain.go

@@ -74,7 +74,7 @@ func (a ruleChainService) create(params *models.RuleChainParams) (firstNodeId st
 	for _, v := range params.Cell {
 		if v.GetString("shape") != "edge" {
 			if v.GetString("shape") == "input-node" {
-				inputNodeId = v.GetString("source.cell")
+				inputNodeId = v.GetString("id")
 				continue
 			}