issue中增加置顶属性

Signed-off-by: zouap <zouap@pcl.ac.cn>

models/issue.go

@@ -70,6 +70,7 @@ type Issue struct {
 	//block_chain
 	Amount        int64
 	IsTransformed bool `xorm:"INDEX NOT NULL DEFAULT false"`
+	StayTop       int  `xorm:"NOT NULL DEFAULT 0"`
 }
 
 var (
@@ -1116,6 +1117,7 @@ type IssuesOptions struct {
 // sortIssuesSession sort an issues-related session based on the provided
 // sortType string
 func sortIssuesSession(sess *xorm.Session, sortType string, priorityRepoID int64) {
+	sess.Desc("issue.stay_top")
 	switch sortType {
 	case "oldest":
 		sess.Asc("issue.created_unix")