diff --git a/deployments/db.js b/deployments/db.js
index 11d14b3a..b8ac33f8 100644
--- a/deployments/db.js
+++ b/deployments/db.js
@@ -114,14 +114,14 @@ db.createCollection( "polling_detail", {
 } );
 
 //index
-db.kv.createIndex({"id": 1}, { unique: true });
-db.kv.createIndex({key: 1, label_format: 1,domain:1,project:1},{ unique: true });
-db.kv_revision.createIndex( { "delete_time": 1 }, { expireAfterSeconds: 7 * 24 * 3600 });
-db.label.createIndex({"id": 1}, { unique: true });
-db.label.createIndex({format: 1,domain:1,project:1},{ unique: true});
-db.polling_detail.createIndex({timestamp: 1}, { expireAfterSeconds: 7 * 24 * 3600});
-db.counter.createIndex({name: 1,domain:1},{ unique: true });
+db.kv.createIndex({"id": 1}, { unique: true } );
+db.kv.createIndex({key: 1, label_format: 1,domain:1,project:1},{ unique: true } );
+db.kv_revision.createIndex( { "delete_time": 1 }, { expireAfterSeconds: 7 * 24 * 3600 } );
+db.label.createIndex({"id": 1}, { unique: true } );
+db.label.createIndex({format: 1,domain:1,project:1},{ unique: true } );
+db.polling_detail.createIndex({timestamp: 1}, { expireAfterSeconds: 7 * 24 * 3600 } );
+db.counter.createIndex({name: 1,domain:1},{ unique: true } );
 db.view.createIndex({"id": 1}, { unique: true } );
-db.view.createIndex({display:1,domain:1,project:1},{ unique: true });
+db.view.createIndex({display:1,domain:1,project:1},{ unique: true } );
 //db config
-db.setProfilingLevel(1, {slowms: 80, sampleRate: 1} );
\ No newline at end of file
+db.setProfilingLevel(1, {slowms: 80, sampleRate: 1 } );
\ No newline at end of file
diff --git a/pkg/model/db_schema.go b/pkg/model/db_schema.go
index d638b690..39becb03 100644
--- a/pkg/model/db_schema.go
+++ b/pkg/model/db_schema.go
@@ -70,7 +70,7 @@ type PollingDetail struct {
 	URLPath        string                 `json:"url_path,omitempty"  bson:"url_path,"  yaml:"url_path,omitempty"`
 	ResponseBody   []*KVDoc               `json:"kv,omitempty"  bson:"kv,"  yaml:"kv,omitempty"`
 	ResponseCode   int                    `json:"response_code,omitempty"  bson:"response_code,"  yaml:"response_code,omitempty"`
-	Timestamp     time.Time              `json:"timestamp,omitempty" yaml:"timestamp,omitempty"`
+	Timestamp     time.Time               `json:"timestamp,omitempty" yaml:"timestamp,omitempty"`
 }
 
 // UpdateKVRequest is db struct, it contains kv update request params
diff --git a/server/resource/v1/common.go b/server/resource/v1/common.go
index ad03d099..8500e415 100644
--- a/server/resource/v1/common.go
+++ b/server/resource/v1/common.go
@@ -43,7 +43,7 @@ import (
 const (
 	HeaderUserAgent    = "User-Agent"
 	HeaderSessionID    = "X-Session-Id"
-	HeaderSessionGroup    = "X-Session-Group"
+	HeaderSessionGroup = "X-Session-Group"
 	AttributeDomainKey = "domain"
 
 	FmtReadRequestError = "decode request body failed: %v"