fix issue in Cache Penetration for cache feature of package gdb

gqcn · gqcn · commit ebe90dcaa895 · 2021-07-21T19:24:16.000+08:00
diff --git a/database/gdb/gdb_model_select.go b/database/gdb/gdb_model_select.go
@@ -552,6 +552,10 @@ func (m *Model) doGetAllBySql(sql string, args ...interface{}) (result Result, e
 				intlog.Error(m.GetCtx(), err)
 			}
 		} else {
+			// In case of Cache Penetration.
+			if result == nil {
+				result = Result{}
+			}
 			if err := cacheObj.Set(cacheKey, result, m.cacheDuration); err != nil {
 				intlog.Error(m.GetCtx(), err)
 			}

Original file line number	Diff line number	Diff line change
`@@ -552,6 +552,10 @@ func (m *Model) doGetAllBySql(sql string, args ...interface{}) (result Result, e`
`552`	`552`	`intlog.Error(m.GetCtx(), err)`
`553`	`553`	`}`
`554`	`554`	`} else {`
	`555`	`+ // In case of Cache Penetration.`
	`556`	`+ if result == nil {`
	`557`	`+ result = Result{}`
	`558`	`+ }`
`555`	`559`	`if err := cacheObj.Set(cacheKey, result, m.cacheDuration); err != nil {`
`556`	`560`	`intlog.Error(m.GetCtx(), err)`
`557`	`561`	`}`