Fixes for unreachable project issues when transfer repository from organization (#31770)

When transferring repositories that have issues linked to a project
board to another organization, the issues remain associated with the
original project board. This causes the columns in the project board to
become bugged, making it difficult to move other issues in or out of the
affected columns. As a solution, I removed the issue relations since the
other organization does not have this project table.

Fix for #31538

Co-authored-by: Jason Song <[email protected]>

Author: emrebdr

Diff for: models/project/issue.go

@@ -117,3 +117,9 @@ func (c *Column) moveIssuesToAnotherColumn(ctx context.Context, newColumn *Colum
 		return nil
 	})
 }
+
+// DeleteAllProjectIssueByIssueIDsAndProjectIDs delete all project's issues by issue's and project's ids
+func DeleteAllProjectIssueByIssueIDsAndProjectIDs(ctx context.Context, issueIDs, projectIDs []int64) error {
+	_, err := db.GetEngine(ctx).In("project_id", projectIDs).In("issue_id", issueIDs).Delete(&ProjectIssue{})
+	return err
+}

Diff for: models/project/project.go

@@ -296,6 +296,12 @@ func GetProjectForRepoByID(ctx context.Context, repoID, id int64) (*Project, err
 	return p, nil
 }
 
+// GetAllProjectsIDsByOwnerID returns the all projects ids it owns
+func GetAllProjectsIDsByOwnerIDAndType(ctx context.Context, ownerID int64, projectType Type) ([]int64, error) {
+	projects := make([]int64, 0)
+	return projects, db.GetEngine(ctx).Table(&Project{}).Where("owner_id=? AND type=?", ownerID, projectType).Cols("id").Find(&projects)
+}
+
 // UpdateProject updates project properties
 func UpdateProject(ctx context.Context, p *Project) error {
 	if !IsCardTypeValid(p.CardType) {

Diff for: options/locale/locale_en-US.ini

@@ -2186,6 +2186,7 @@ settings.transfer_in_progress = There is currently an ongoing transfer. Please c
 settings.transfer_notices_1 = - You will lose access to the repository if you transfer it to an individual user.
 settings.transfer_notices_2 = - You will keep access to the repository if you transfer it to an organization that you (co-)own.
 settings.transfer_notices_3 = - If the repository is private and is transferred to an individual user, this action makes sure that the user does have at least read permission (and changes permissions if necessary).
+settings.transfer_notices_4 = - If the repository belongs to an organization, and you transfer it to another organization or individual, you will lose the links between the repository's issues and the organization's project board.
 settings.transfer_owner = New Owner
 settings.transfer_perform = Perform Transfer
 settings.transfer_started = This repository has been marked for transfer and awaits confirmation from "%s"

Diff for: services/repository/transfer.go

@@ -15,6 +15,7 @@ import (
 	"code.gitea.io/gitea/models/organization"
 	"code.gitea.io/gitea/models/perm"
 	access_model "code.gitea.io/gitea/models/perm/access"
+	project_model "code.gitea.io/gitea/models/project"
 	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/log"
@@ -177,6 +178,22 @@ func transferOwnership(ctx context.Context, doer *user_model.User, newOwnerName
 		}
 	}
 
+	// Remove project's issues that belong to old organization's projects
+	if oldOwner.IsOrganization() {
+		projects, err := project_model.GetAllProjectsIDsByOwnerIDAndType(ctx, oldOwner.ID, project_model.TypeOrganization)
+		if err != nil {
+			return fmt.Errorf("Unable to find old org projects: %w", err)
+		}
+		issues, err := issues_model.GetIssueIDsByRepoID(ctx, repo.ID)
+		if err != nil {
+			return fmt.Errorf("Unable to find repo's issues: %w", err)
+		}
+		err = project_model.DeleteAllProjectIssueByIssueIDsAndProjectIDs(ctx, issues, projects)
+		if err != nil {
+			return fmt.Errorf("Unable to delete project's issues: %w", err)
+		}
+	}
+
 	if newOwner.IsOrganization() {
 		teams, err := organization.FindOrgTeams(ctx, newOwner.ID)
 		if err != nil {

Diff for: templates/repo/settings/options.tmpl

@@ -957,7 +957,8 @@
 			<div class="ui warning message">
 				{{ctx.Locale.Tr "repo.settings.transfer_notices_1"}} <br>
 				{{ctx.Locale.Tr "repo.settings.transfer_notices_2"}} <br>
-				{{ctx.Locale.Tr "repo.settings.transfer_notices_3"}}
+				{{ctx.Locale.Tr "repo.settings.transfer_notices_3"}} <br>
+				{{ctx.Locale.Tr "repo.settings.transfer_notices_4"}}
 			</div>
 			<form class="ui form" action="{{.Link}}" method="post">
 				{{.CsrfTokenHtml}}