Refactor struct's time to remove unnecessary memory usage (#3142)

* refactor struct's time to remove unnecessary memory usage

* use AsTimePtr simple code

* fix tests

* fix time compare

* fix template on gpg

* use AddDuration instead of Add

models/repo_unit.go

@@ -6,7 +6,8 @@ package models
 
 import (
 	"encoding/json"
-	"time"
+
+	"code.gitea.io/gitea/modules/util"
 
 	"github.com/Unknwon/com"
 	"github.com/go-xorm/core"
@@ -19,8 +20,7 @@ type RepoUnit struct {
 	RepoID      int64           `xorm:"INDEX(s)"`
 	Type        UnitType        `xorm:"INDEX(s)"`
 	Config      core.Conversion `xorm:"TEXT"`
-	CreatedUnix int64           `xorm:"INDEX CREATED"`
-	Created     time.Time       `xorm:"-"`
+	CreatedUnix util.TimeStamp  `xorm:"INDEX CREATED"`
 }
 
 // UnitConfig describes common unit config
@@ -105,11 +105,6 @@ func (r *RepoUnit) BeforeSet(colName string, val xorm.Cell) {
 	}
 }
 
-// AfterLoad is invoked from XORM after setting the values of all fields of this object.
-func (r *RepoUnit) AfterLoad() {
-	r.Created = time.Unix(r.CreatedUnix, 0).Local()
-}
-
 // Unit returns Unit
 func (r *RepoUnit) Unit() Unit {
 	return Units[r.Type]