Merge 963df7d669e204a8ce6d8cb565dc4ace6db3cb26 into dd1fd89185103958cb504e362df91fd2f7856939

models/project/column.go

@@ -157,11 +157,6 @@ func NewColumn(ctx context.Context, column *Column) error {
 // DeleteColumnByID removes all issues references to the project column.
 func DeleteColumnByID(ctx context.Context, columnID int64) error {
 	return db.WithTx(ctx, func(ctx context.Context) error {
-		return deleteColumnByID(ctx, columnID)
-	})
-}
-
-func deleteColumnByID(ctx context.Context, columnID int64) error {
 		column, err := GetColumn(ctx, columnID)
 		if err != nil {
 			if IsErrProjectColumnNotExist(err) {
@@ -175,24 +170,39 @@ func deleteColumnByID(ctx context.Context, columnID int64) error {
 			return errors.New("deleteColumnByID: cannot delete default column")
 		}
 
-	// move all issues to the default column
+		var numColumns int64
+		if _, err := db.GetEngine(ctx).Table("project_board").
+			Where("project_id=?", column.ProjectID).Count(&numColumns); err != nil {
+			return err
+		}
+
+		// last column with issues cannot be deleted
+		if column.NumIssues > 0 && numColumns <= 1 {
+			return errors.New("deleteColumnByID: cannot delete last column with issues")
+		}
+
+		if column.NumIssues > 0 {
 			project, err := GetProjectByID(ctx, column.ProjectID)
 			if err != nil {
 				return err
 			}
-	defaultColumn, err := project.MustDefaultColumn(ctx)
+
+			defaultColumn, err := project.getDefaultColumn(ctx)
 			if err != nil {
 				return err
 			}
 
+			// move all issues to the default column
 			if err = column.moveIssuesToAnotherColumn(ctx, defaultColumn); err != nil {
 				return err
 			}
+		}
 
 		if _, err := db.GetEngine(ctx).ID(column.ID).NoAutoCondition().Delete(column); err != nil {
 			return err
 		}
 		return nil
+	})
 }
 
 func deleteColumnByProjectID(ctx context.Context, projectID int64) error {
@@ -261,6 +271,20 @@ func (p *Project) getDefaultColumn(ctx context.Context) (*Column, error) {
 	return nil, ErrProjectColumnNotExist{ColumnID: 0}
 }
 
+func (p *Project) createDefaultColumn(ctx context.Context) (*Column, error) {
+	// create a default column if none is found
+	column := Column{
+		ProjectID: p.ID,
+		Default:   true,
+		Title:     "Uncategorized",
+		CreatorID: p.CreatorID,
+	}
+	if _, err := db.GetEngine(ctx).Insert(&column); err != nil {
+		return nil, err
+	}
+	return &column, nil
+}
+
 // MustDefaultColumn returns the default column for a project.
 // If one exists, it is returned
 // If none exists, the first column will be elevated to the default column of this project
@@ -286,17 +310,7 @@ func (p *Project) MustDefaultColumn(ctx context.Context) (*Column, error) {
 		return &column, nil
 	}
 
-	// create a default column if none is found
-	column = Column{
-		ProjectID: p.ID,
-		Default:   true,
-		Title:     "Uncategorized",
-		CreatorID: p.CreatorID,
-	}
-	if _, err := db.GetEngine(ctx).Insert(&column); err != nil {
-		return nil, err
-	}
-	return &column, nil
+	return p.createDefaultColumn(ctx)
 }
 
 // SetDefaultColumn represents a column for issues not assigned to one

services/projects/issue.go

@@ -100,12 +100,7 @@ func LoadIssuesFromProject(ctx context.Context, project *project_model.Project,
 		return nil, err
 	}
 
-	defaultColumn, err := project.MustDefaultColumn(ctx)
-	if err != nil {
-		return nil, err
-	}
-
-	issueColumnMap, err := issues_model.LoadProjectIssueColumnMap(ctx, project.ID, defaultColumn.ID)
+	issueColumnMap, err := issues_model.LoadProjectIssueColumnMap(ctx, project.ID, 0)
 	if err != nil {
 		return nil, err
 	}
@@ -113,7 +108,7 @@ func LoadIssuesFromProject(ctx context.Context, project *project_model.Project,
 	results := make(map[int64]issues_model.IssueList)
 	for _, issue := range issueList {
 		projectColumnID, ok := issueColumnMap[issue.ID]
-		if !ok {
+		if !ok || projectColumnID == 0 {
 			continue
 		}
 		if _, ok := results[projectColumnID]; !ok {