---
phase: 08-task-delete
verified: 2026-03-18T20:30:00Z
status: passed
score: 9/9 must-haves verified
re_verification: false
---

# Phase 8: Task Delete Verification Report

**Phase Goal:** Users can remove tasks they no longer need, with smart preservation of completion history for future statistics
**Verified:** 2026-03-18T20:30:00Z
**Status:** passed
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | Active tasks appear in all views (calendar, room task lists, daily plan) | VERIFIED | All 4 DAOs filter `isActive=true`; 15 query sites confirmed across `tasks_dao.dart`, `calendar_dao.dart`, `daily_plan_dao.dart`, `rooms_dao.dart` |
| 2 | Deactivated tasks are hidden from all views | VERIFIED | `isActive.equals(true)` present on all 6 CalendarDao queries, all 3 DailyPlanDao queries, `watchTasksInRoom`, `getOverdueTaskCount`, and `watchRoomWithStats` |
| 3 | Hard delete removes task and completions from DB entirely | VERIFIED | `deleteTask` in `tasks_dao.dart` uses a transaction to delete completions then task; test "hard deleteTask still removes task and its completions" passes |
| 4 | Soft delete sets isActive to false without removing data | VERIFIED | `softDeleteTask` updates `isActive: Value(false)` only; test "softDeleteTask sets isActive to false without removing the task" passes — row count stays 1, `isActive == false` |
| 5 | Existing tasks default to active after migration | VERIFIED | `BoolColumn.withDefault(const Constant(true))` on Tasks table; `from == 2` migration block calls `m.addColumn(tasks, tasks.isActive)` which applies the default to existing rows |
| 6 | User sees a red delete button at the bottom of the task edit form | VERIFIED | `FilledButton.icon` with `backgroundColor: theme.colorScheme.error` inside `if (widget.isEditing)` block in `task_form_screen.dart` lines 207-218 |
| 7 | Tapping delete shows a confirmation dialog before any action | VERIFIED | `_onDelete()` calls `showDialog<bool>` with `AlertDialog` containing title `l10n.taskDeleteConfirmTitle`, message `l10n.taskDeleteConfirmMessage`, cancel TextButton, and error-colored confirm FilledButton |
| 8 | Confirming delete routes to hard or soft delete based on completion history | VERIFIED | `smartDeleteTask` in `task_providers.dart` calls `getCompletionCount` and branches: `deleteTask` if 0, `softDeleteTask` if >0 |
| 9 | After deletion the user is navigated back to the room task list | VERIFIED | `_onDelete()` calls `context.pop()` after awaiting `smartDeleteTask`; guarded by `if (mounted)` check |

**Score:** 9/9 truths verified

---

### Required Artifacts

| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `lib/core/database/database.dart` | `isActive` BoolColumn, schema v3, migration | VERIFIED | Line 38-39: `BoolColumn get isActive => boolean().withDefault(const Constant(true))();`; `schemaVersion => 3`; `from == 2` block calls `m.addColumn(tasks, tasks.isActive)` |
| `lib/features/tasks/data/tasks_dao.dart` | `softDeleteTask`, `getCompletionCount`, `isActive` filter on queries | VERIFIED | Both methods present (lines 115-128); `watchTasksInRoom` and `getOverdueTaskCount` filter by `isActive.equals(true)` |
| `lib/features/home/data/calendar_dao.dart` | `isActive=true` filter on all 6 queries | VERIFIED | All 6 methods confirmed: `watchTasksForDate` (l32), `getTaskCount` (l56), `watchTasksForDateInRoom` (l76), `watchOverdueTasks` (l105), `watchOverdueTasksInRoom` (l139), `getTaskCountInRoom` (l164) |
| `lib/features/home/data/daily_plan_dao.dart` | `isActive=true` filter on all 3 queries | VERIFIED | `watchAllTasksWithRoomName` (l20), `getOverdueAndTodayTaskCount` (l44), `getOverdueTaskCount` (l57) — all confirmed |
| `lib/features/rooms/data/rooms_dao.dart` | `isActive=true` filter in `watchRoomWithStats` task query | VERIFIED | Line 47-49: `t.roomId.equals(room.id) & t.isActive.equals(true)` |
| `lib/features/tasks/presentation/task_providers.dart` | `smartDeleteTask` method using `getCompletionCount` | VERIFIED | Lines 94-102: method exists, branches on completion count to `deleteTask` or `softDeleteTask` |
| `lib/features/tasks/presentation/task_form_screen.dart` | Delete button and confirmation dialog in edit mode; uses `taskDeleteConfirmTitle` | VERIFIED | Lines 204-218 (button), lines 471-507 (`_onDelete` method); `taskDeleteConfirmTitle` at line 476 |
| `test/features/tasks/data/tasks_dao_test.dart` | Tests for `softDeleteTask`, `getCompletionCount`, `isActive` filtering | VERIFIED | 6 new tests present and all 13 tests in file pass |

---

### Key Link Verification

| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| `lib/core/database/database.dart` | All DAOs | `BoolColumn get isActive` on Tasks table | WIRED | 59 occurrences of `isActive` across 6 DAO/schema files |
| `lib/features/tasks/data/tasks_dao.dart` | `lib/features/tasks/presentation/task_providers.dart` | `softDeleteTask` and `getCompletionCount` | WIRED | `task_providers.dart` calls `db.tasksDao.getCompletionCount(taskId)` and `db.tasksDao.softDeleteTask(taskId)` at lines 96-100 |
| `lib/features/tasks/presentation/task_form_screen.dart` | `lib/features/tasks/presentation/task_providers.dart` | `smartDeleteTask` call from `_onDelete` | WIRED | `ref.read(taskActionsProvider.notifier).smartDeleteTask(widget.taskId!)` at line 498 |
| `lib/features/tasks/presentation/task_providers.dart` | `lib/features/tasks/data/tasks_dao.dart` | `getCompletionCount` then conditional `deleteTask` or `softDeleteTask` | WIRED | `smartDeleteTask` method at lines 94-102 confirmed complete — reads count, branches, calls DAO |

---

### Requirements Coverage

| Requirement | Source Plan | Description | Status | Evidence |
|-------------|-------------|-------------|--------|----------|
| DEL-01 | 08-02-PLAN.md | User can delete a task from the task edit form via a clearly visible delete action | SATISFIED | Red `FilledButton.icon` with `Icons.delete_outline` at bottom of edit form, gated on `widget.isEditing` |
| DEL-02 | 08-01-PLAN.md | Hard delete removes task with no completions from DB entirely | SATISFIED | `deleteTask` cascade + `smartDeleteTask` routes to it when `getCompletionCount == 0` |
| DEL-03 | 08-01-PLAN.md | Deleting a task with completions deactivates it (soft delete) | SATISFIED | `softDeleteTask` sets `isActive=false`; all DAO queries filter by `isActive=true` so task disappears from views |
| DEL-04 | 08-02-PLAN.md | User sees a confirmation before deleting/deactivating | SATISFIED | `_onDelete` shows `AlertDialog` with cancel and confirm actions; action only proceeds when `confirmed == true` |

All 4 requirements from REQUIREMENTS.md Phase 8 are SATISFIED. No orphaned requirements found.

---

### Anti-Patterns Found

None. No TODOs, FIXMEs, placeholder returns, or stub implementations found in any modified files.

---

### Human Verification Required

#### 1. Delete button visual appearance

**Test:** Open the app, navigate to a room, tap any task to open the edit form, scroll to the bottom.
**Expected:** A full-width red button labeled "Loschen" (with umlaut) appears below the history row, separated by a divider. Button does not appear when creating a new task.
**Why human:** Visual layout, color rendering, and scroll behavior cannot be verified programmatically.

#### 2. Confirmation dialog flow

**Test:** Tap the delete button. Tap "Abbrechen" (cancel).
**Expected:** Dialog dismisses, form remains open, task is unchanged.
**Why human:** Dialog dismissal behavior and state preservation requires manual interaction.

#### 3. Smart delete — task with no completions (hard delete)

**Test:** Create a fresh task (never completed). Open it, tap delete, confirm.
**Expected:** Task disappears from the room list immediately. Navigated back to room task list.
**Why human:** End-to-end flow requires running app with real navigation and reactive provider updates.

#### 4. Smart delete — task with completions (soft delete)

**Test:** Complete a task at least once. Open it, tap delete, confirm.
**Expected:** Task disappears from all views (room list, calendar, daily plan). Navigation returns to room. Task remains in DB (invisible to user but present for future statistics).
**Why human:** Requires verifying absence from multiple views and confirming data is preserved in DB — combination of UI behavior and DB state inspection.

---

### Gaps Summary

No gaps. All must-haves verified.

---

## Test Results

- `flutter test test/features/tasks/data/tasks_dao_test.dart`: 13/13 passed (including all 6 new soft-delete tests)
- `flutter test --reporter compact`: 144/144 passed
- `dart analyze --fatal-infos`: No issues found

---

_Verified: 2026-03-18T20:30:00Z_
_Verifier: Claude (gsd-verifier)_
