diff --git a/code/rest/matter_dao.go b/code/rest/matter_dao.go
index ab1abab..0bd6920 100644
--- a/code/rest/matter_dao.go
+++ b/code/rest/matter_dao.go
@@ -462,13 +462,13 @@ func (this *MatterDao) SoftDelete(matter *Matter) {
 		}
 
 		//soft delete from db.
-		db := core.CONTEXT.GetDB().Model(&Matter{}).Where("uuid = ?", matter.Uuid).Update(map[string]interface{}{"deleted": 1, "delete_time": time.Now()})
+		db := core.CONTEXT.GetDB().Model(&Matter{}).Where("uuid = ?", matter.Uuid).Update(map[string]interface{}{"deleted": true, "delete_time": time.Now()})
 		this.PanicError(db.Error)
 
 	} else {
 
 		//soft delete from db.
-		db := core.CONTEXT.GetDB().Model(&Matter{}).Where("uuid = ?", matter.Uuid).Update(map[string]interface{}{"deleted": 1, "delete_time": time.Now()})
+		db := core.CONTEXT.GetDB().Model(&Matter{}).Where("uuid = ?", matter.Uuid).Update(map[string]interface{}{"deleted": true, "delete_time": time.Now()})
 		this.PanicError(db.Error)
 
 		//no need to delete its image cache.
diff --git a/code/support/tank_context.go b/code/support/tank_context.go
index e6a2530..a6c8f2b 100644
--- a/code/support/tank_context.go
+++ b/code/support/tank_context.go
@@ -77,7 +77,7 @@ func (this *TankContext) OpenDb() {
 		core.LOGGER.Panic("failed to connect mysql database")
 	}
 
-	//whether open the db log. (only true when debug)
+	//whether open the db sql log. (only true when debug)
 	this.db.LogMode(false)
 }