Add project column picker to issue and pull request sidebar (#37037)

Why? You are working on a ticket, it's ready to be moved to the QA
column in your project. Currently you have to go to the project, find
the issue card, then move it. With this change you can move the issue's
column on the issue page.

When an issue or pull request belongs to a project board, a dropdown
appears in the sidebar to move it between columns without opening the
board view. Read-only users see the current column name instead.

* Fix #13520
* Replace #30617

This was written using Claude Code and Opus. 

Closed:

<img width="1346" height="507" alt="image"
src="https://github.com/user-attachments/assets/7c1ea7ee-b71c-40af-bb14-aeb1d2beff73"
/>

Open:
<img width="1315" height="577" alt="image"
src="https://github.com/user-attachments/assets/4d64b065-44c2-42c7-8d20-84b5caea589a"
/>

---------

Signed-off-by: silverwind <me@silverwind.io>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Claude (Opus 4.7) <noreply@anthropic.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Nicolas <bircni@icloud.com>
Co-authored-by: Cursor <cursor@cursor.com>

routers/web/repo/issue_page_meta.go

@@ -33,12 +33,15 @@ type issueSidebarAssigneesData struct {
 	CandidateAssignees  []*user_model.User
 }
 
+type issueSidebarProjectCardData struct {
+	Project        *project_model.Project
+	Columns        []*project_model.Column
+	SelectedColumn *project_model.Column
+}
+
 type issueSidebarProjectsData struct {
 	SelectedProjectIDs []int64 // TODO: support multiple projects in the future
-
-	// the "selected" fields are only valid when len(SelectedProjectIDs)==1
-	SelectedProjectColumns []*project_model.Column
-	SelectedProjectColumn  *project_model.Column
+	ProjectCards       []*issueSidebarProjectCardData
 
 	OpenProjects   []*project_model.Project
 	ClosedProjects []*project_model.Project
@@ -172,30 +175,37 @@ func (d *IssuePageMetaData) retrieveProjectData(ctx *context.Context) {
 	if d.Issue == nil || d.Issue.Project == nil {
 		return
 	}
-	d.ProjectsData.SelectedProjectIDs = []int64{d.Issue.Project.ID}
 	columns, err := d.Issue.Project.GetColumns(ctx)
 	if err != nil {
 		ctx.ServerError("GetProjectColumns", err)
 		return
 	}
-	d.ProjectsData.SelectedProjectColumns = columns
 	columnID, err := d.Issue.ProjectColumnID(ctx)
 	if err != nil {
 		ctx.ServerError("ProjectColumnID", err)
 		return
 	}
+	var selectedColumn *project_model.Column
 	for _, col := range columns {
 		if col.ID == columnID {
-			d.ProjectsData.SelectedProjectColumn = col
+			selectedColumn = col
 			break
 		}
 	}
+	d.ProjectsData.ProjectCards = []*issueSidebarProjectCardData{
+		{
+			Project:        d.Issue.Project,
+			Columns:        columns,
+			SelectedColumn: selectedColumn,
+		},
+	}
+	d.ProjectsData.SelectedProjectIDs = make([]int64, 0, len(d.ProjectsData.ProjectCards))
+	for _, card := range d.ProjectsData.ProjectCards {
+		d.ProjectsData.SelectedProjectIDs = append(d.ProjectsData.SelectedProjectIDs, card.Project.ID)
+	}
 }
 
 func (d *IssuePageMetaData) retrieveProjectsDataForIssueWriter(ctx *context.Context) {
-	if d.Issue != nil && d.Issue.Project != nil {
-		d.ProjectsData.SelectedProjectIDs = []int64{d.Issue.Project.ID}
-	}
 	d.ProjectsData.OpenProjects, d.ProjectsData.ClosedProjects = retrieveProjectsInternal(ctx, ctx.Repo.Repository)
 }
 

routers/web/repo/projects.go

@@ -464,6 +464,54 @@ func UpdateIssueProject(ctx *context.Context) {
 	ctx.JSONOK()
 }
 
+// UpdateIssueProjectColumn moves an issue to a different column within its project
+func UpdateIssueProjectColumn(ctx *context.Context) {
+	issue, err := issues_model.GetIssueByRepoID(ctx, ctx.Repo.Repository.ID, ctx.FormInt64("issue_id"))
+	if err != nil {
+		ctx.NotFoundOrServerError("GetIssueByID", issues_model.IsErrIssueNotExist, err)
+		return
+	}
+	column, err := project_model.GetColumn(ctx, ctx.FormInt64("id"))
+	if err != nil {
+		ctx.NotFoundOrServerError("GetColumn", project_model.IsErrProjectColumnNotExist, err)
+		return
+	}
+
+	if err := issue.LoadProject(ctx); err != nil {
+		ctx.ServerError("LoadProject", err)
+		return
+	}
+
+	issueProjects := []*project_model.Project{issue.Project} // TODO: this is for the multiple project support in the future
+
+	// it must make sure the requested column is in this issue's projects
+	var columnProject *project_model.Project
+	for _, project := range issueProjects {
+		if column.ProjectID == project.ID {
+			columnProject = project
+			break
+		}
+	}
+	if columnProject == nil {
+		ctx.NotFound(nil)
+		return
+	}
+
+	// append to the end of the target column so we don't collide with existing sorting values
+	newSorting, err := project_model.GetColumnIssueNextSorting(ctx, columnProject.ID, column.ID)
+	if err != nil {
+		ctx.ServerError("GetColumnIssueNextSorting", err)
+		return
+	}
+
+	if err := project_service.MoveIssuesOnProjectColumn(ctx, ctx.Doer, column, map[int64]int64{newSorting: issue.ID}); err != nil {
+		ctx.ServerError("MoveIssuesOnProjectColumn", err)
+		return
+	}
+
+	ctx.JSONOK()
+}
+
 // DeleteProjectColumn allows for the deletion of a project column
 func DeleteProjectColumn(ctx *context.Context) {
 	if ctx.Doer == nil {

routers/web/web.go

@@ -1355,6 +1355,7 @@ func registerWebRoutes(m *web.Router, webAuth *AuthMiddleware) {
 			m.Post("/labels", reqRepoIssuesOrPullsWriter, repo.UpdateIssueLabel)
 			m.Post("/milestone", reqRepoIssuesOrPullsWriter, repo.UpdateIssueMilestone)
 			m.Post("/projects", reqRepoIssuesOrPullsWriter, reqRepoProjectsReader, repo.UpdateIssueProject)
+			m.Post("/projects/column", reqRepoIssuesOrPullsWriter, reqRepoProjectsWriter, repo.UpdateIssueProjectColumn)
 			m.Post("/assignee", reqRepoIssuesOrPullsWriter, repo.UpdateIssueAssignee)
 			m.Post("/status", reqRepoIssuesOrPullsWriter, repo.UpdateIssueStatus)
 			m.Post("/delete", reqRepoAdmin, repo.BatchDeleteIssues)