Fix deadline on update issue or PR via API (#8698)

routers/api/v1/repo/issue.go

@@ -312,15 +312,14 @@ func EditIssue(ctx *context.APIContext, form api.EditIssueOption) {
 	}
 
 	// Update the deadline
-	var deadlineUnix timeutil.TimeStamp
-	if form.Deadline != nil && !form.Deadline.IsZero() && ctx.Repo.CanWrite(models.UnitTypeIssues) {
-		deadlineUnix = timeutil.TimeStamp(form.Deadline.Unix())
-	}
-
+	if form.Deadline != nil && ctx.Repo.CanWrite(models.UnitTypeIssues) {
+		deadlineUnix := timeutil.TimeStamp(form.Deadline.Unix())
 		if err := models.UpdateIssueDeadline(issue, deadlineUnix, ctx.User); err != nil {
 			ctx.Error(500, "UpdateIssueDeadline", err)
 			return
 		}
+		issue.DeadlineUnix = deadlineUnix
+	}
 
 	// Add/delete assignees
 

routers/api/v1/repo/pull.go

@@ -368,15 +368,14 @@ func EditPullRequest(ctx *context.APIContext, form api.EditPullRequestOption) {
 	}
 
 	// Update Deadline
-	var deadlineUnix timeutil.TimeStamp
-	if form.Deadline != nil && !form.Deadline.IsZero() {
-		deadlineUnix = timeutil.TimeStamp(form.Deadline.Unix())
-	}
-
+	if form.Deadline != nil {
+		deadlineUnix := timeutil.TimeStamp(form.Deadline.Unix())
 		if err := models.UpdateIssueDeadline(issue, deadlineUnix, ctx.User); err != nil {
 			ctx.Error(500, "UpdateIssueDeadline", err)
 			return
 		}
+		issue.DeadlineUnix = deadlineUnix
+	}
 
 	// Add/delete assignees