Fix #9189 - API Allow only specific Colums to be updated on Issue (#9539)

* dont insert "-1" in any case to issue.poster_id

* Make sure API cant override importand fields

* code format

* fix lint

* WIP test

* add missing poster_id

* fix test

* user.IsGhost handle nil

* CI.restart()

* make sure no -1 is realy added

* CI.restart()

* @lunny suggestion remove some not allowed fields

* seperate issue.LoadMilestone

* load milestone and return it on IssueEdit via API

* extend Test for TestAPIEditIssue

* fix fixtures

* declare allowedColumnsUpdateIssueByAPI only once

* Update Year

* no var just write id drecty into func cal

Co-authored-by: Lauris BH <lauris@nix.lv>

models/user.go

@@ -791,6 +791,14 @@ func NewGhostUser() *User {
 	}
 }
 
+// IsGhost check if user is fake user for a deleted account
+func (u *User) IsGhost() bool {
+	if u == nil {
+		return false
+	}
+	return u.ID == -1 && u.Name == "Ghost"
+}
+
 var (
 	reservedUsernames = []string{
 		"attachments",