Add trello boards with empty organization under a "Personal" project

pkg/modules/migration/trello/trello.go

@@ -124,6 +124,11 @@ func createOrganizationMap(trelloData []*trello.Board) map[string][]*trello.Boar
 	boardMap := make(map[string][]*trello.Board)
 
 	for _, board := range trelloData {
+		// Trello boards without an organization are considered personal boards
+		if board.IDOrganization == "" {
+			board.IDOrganization = "Personal"
+		}
+
 		boards, ok := boardMap[board.IDOrganization]
 		if ok {
 			boards = append(boards, board)

pkg/modules/migration/trello/trello_test.go

@@ -210,6 +210,20 @@ func getTestBoard(t *testing.T) ([]*trello.Board, time.Time) {
 				},
 			},
 		},
+		{
+			Name: "Personal Board",
+			Lists: []*trello.List{
+				{
+					Name: "Test Project 6",
+					Cards: []*trello.Card{
+						{
+							Name: "Test Card 5659",
+							Pos:  123,
+						},
+					},
+				},
+			},
+		},
 	}
 	trelloData[0].Prefs.BackgroundImage = "https://vikunja.io/testimage.jpg" // Using an image which we are hosting, so it'll still be up
 
@@ -433,6 +447,9 @@ func TestCreateOrganizationMap(t *testing.T) {
 		"orgid2": {
 			trelloData[1],
 		},
+		"Personal": {
+			trelloData[3],
+		},
 	}
 	if diff, equal := messagediff.PrettyDiff(organizationMap, expectedMap); !equal {
 		t.Errorf("converted trello data = %v,\nwant %v,\ndiff: %v", organizationMap, expectedMap, diff)