feat(absences): add optional project FK on Absence

Migration 0015 adds Project FK (SET_NULL, nullable) to Absence.
When is_paid=True, the auto-Bonus PayrollAdjustment inherits the
project for cost-attribution. Form + admin + list + edit + log
templates expose the field. List view filter now uses
absence.project_id directly (was indirect via worker__work_logs).
5 new tests.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

core/admin.py

@@ -88,10 +88,16 @@ class WorkerWarningAdmin(admin.ModelAdmin):
 
 @admin.register(Absence)
 class AbsenceAdmin(admin.ModelAdmin):
-    list_display = ('worker', 'date', 'reason', 'is_paid', 'logged_by', 'created_at')
-    list_filter = ('reason', 'is_paid', 'date')
+    # `project` shown alongside reason/is_paid so the admin index reads as
+    # "worker — project — reason — paid" at a glance.
+    list_display = ('worker', 'project', 'date', 'reason', 'is_paid', 'logged_by', 'created_at')
+    # `project` filter sits next to reason — handy for "which workers were
+    # absent on Solar Farm Alpha last month".
+    list_filter = ('reason', 'is_paid', 'project', 'date')
     search_fields = ('worker__name', 'worker__id_number', 'notes')
-    raw_id_fields = ('worker', 'logged_by', 'payroll_adjustment')
+    # `project` is a small set normally but raw_id keeps the form fast
+    # even if it grows. Same treatment as the other FKs.
+    raw_id_fields = ('worker', 'logged_by', 'payroll_adjustment', 'project')
     readonly_fields = ('created_at', 'updated_at')
     date_hierarchy = 'date'
 

core/forms.py

@@ -668,9 +668,12 @@ class AbsenceLogForm(forms.ModelForm):
 
     class Meta:
         model = Absence
-        fields = ['date', 'reason', 'is_paid', 'notes']
+        # `project` slots in between date and reason — it's part of the
+        # "what happened" header, not a per-row notes detail. Optional.
+        fields = ['date', 'project', 'reason', 'is_paid', 'notes']
         widgets = {
             'date': forms.DateInput(attrs={'type': 'date', 'class': 'form-control'}),
+            'project': forms.Select(attrs={'class': 'form-select'}),
             'reason': forms.Select(attrs={'class': 'form-select'}),
             'is_paid': forms.CheckboxInput(attrs={'class': 'form-check-input'}),
             'notes': forms.Textarea(attrs={'rows': 3, 'class': 'form-control'}),
@@ -679,8 +682,13 @@ class AbsenceLogForm(forms.ModelForm):
     def __init__(self, *args, user=None, **kwargs):
         super().__init__(*args, **kwargs)
         self.user = user
-        # Supervisor scope: limit team + workers querysets to the user's
-        # reach. Admins (staff/superuser) keep the default "all active" lists.
+        # Project is optional — admins can leave it blank for non-project
+        # absences (e.g. Annual Leave). When set + is_paid=True, the auto-
+        # created Bonus PayrollAdjustment will inherit it for cost-attribution.
+        self.fields['project'].required = False
+        # Supervisor scope: limit team + workers + project querysets to
+        # the user's reach. Admins (staff/superuser) keep the default
+        # "all active" lists.
         if user is not None and not (user.is_staff or user.is_superuser):
             self.fields['team'].queryset = (
                 Team.objects.filter(active=True, supervisor=user)
@@ -695,6 +703,14 @@ class AbsenceLogForm(forms.ModelForm):
                     teams__active=True,
                 ).distinct()
             )
+            # Project dropdown — only projects this supervisor is assigned to.
+            # Mirrors the AttendanceLogForm supervisor scoping pattern.
+            self.fields['project'].queryset = Project.objects.filter(
+                active=True, supervisors=user,
+            )
+        else:
+            # Admins see every active project.
+            self.fields['project'].queryset = Project.objects.filter(active=True)
 
     def clean(self):
         cleaned = super().clean()
@@ -787,13 +803,29 @@ class AbsenceQuickForm(forms.ModelForm):
 
     class Meta:
         model = Absence
-        fields = ['reason', 'is_paid', 'notes']
+        # `project` is optional — the modal may be opened from a worker row
+        # that already has a current project context (e.g. quick-mark from
+        # /attendance/log/), in which case the view can pre-fill it.
+        fields = ['project', 'reason', 'is_paid', 'notes']
         widgets = {
+            'project': forms.Select(attrs={'class': 'form-select'}),
             'reason': forms.Select(attrs={'class': 'form-select'}),
             'is_paid': forms.CheckboxInput(attrs={'class': 'form-check-input'}),
             'notes': forms.Textarea(attrs={'rows': 2, 'class': 'form-control'}),
         }
 
+    def __init__(self, *args, user=None, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.fields['project'].required = False
+        # Supervisor scope: project dropdown only shows their assigned projects.
+        # Admin / staff sees every active project.
+        if user is not None and not (user.is_staff or user.is_superuser):
+            self.fields['project'].queryset = Project.objects.filter(
+                active=True, supervisors=user,
+            )
+        else:
+            self.fields['project'].queryset = Project.objects.filter(active=True)
+
 
 class AbsenceEditForm(forms.ModelForm):
     """Edit one existing Absence. Lets admin correct worker/date as well
@@ -802,10 +834,13 @@ class AbsenceEditForm(forms.ModelForm):
 
     class Meta:
         model = Absence
-        fields = ['worker', 'date', 'reason', 'is_paid', 'notes']
+        # `project` is editable — admins can add or change the project link
+        # after the fact. Optional (matches the model's blank=True, null=True).
+        fields = ['worker', 'date', 'project', 'reason', 'is_paid', 'notes']
         widgets = {
             'worker': forms.Select(attrs={'class': 'form-select'}),
             'date': forms.DateInput(attrs={'type': 'date', 'class': 'form-control'}),
+            'project': forms.Select(attrs={'class': 'form-select'}),
             'reason': forms.Select(attrs={'class': 'form-select'}),
             'is_paid': forms.CheckboxInput(attrs={'class': 'form-check-input'}),
             'notes': forms.Textarea(attrs={'rows': 3, 'class': 'form-control'}),
@@ -815,16 +850,24 @@ class AbsenceEditForm(forms.ModelForm):
         super().__init__(*args, **kwargs)
         # Default: every active worker. Admins (staff/superuser) keep this list.
         self.fields['worker'].queryset = Worker.objects.filter(active=True)
+        # Project is optional — leave blank for non-project absences.
+        self.fields['project'].required = False
         # Supervisor scope: when a non-admin opens the edit form, the worker
         # dropdown is restricted to workers on their own active supervised
         # teams. Prevents a supervisor from silently re-assigning an absence
-        # to a worker they don't supervise.
+        # to a worker they don't supervise. Project dropdown also scoped
+        # to supervisor's assigned projects.
         if user is not None and not (user.is_staff or user.is_superuser):
             self.fields['worker'].queryset = Worker.objects.filter(
                 active=True,
                 teams__supervisor=user,
                 teams__active=True,
             ).distinct()
+            self.fields['project'].queryset = Project.objects.filter(
+                active=True, supervisors=user,
+            )
+        else:
+            self.fields['project'].queryset = Project.objects.filter(active=True)
 
     def clean(self):
         cleaned = super().clean()

core/migrations/0015_absence_project.py

@@ -0,0 +1,19 @@
+# Generated by Django 5.2.7 on 2026-05-14 19:55
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0014_add_absence'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='absence',
+            name='project',
+            field=models.ForeignKey(blank=True, help_text='Which project was this worker absent from? (optional)', null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='absences', to='core.project'),
+        ),
+    ]

core/models.py

@@ -485,6 +485,20 @@ class Absence(models.Model):
     worker = models.ForeignKey(
         Worker, related_name='absences', on_delete=models.CASCADE,
     )
+    # === PROJECT LINK (optional) ===
+    # Records which project the worker was absent FROM that day. Optional
+    # because not every absence is project-specific (e.g. "Annual Leave"
+    # might not be tied to a project). When set AND is_paid=True, the
+    # auto-created Bonus PayrollAdjustment inherits this project for
+    # cost-attribution. SET_NULL on delete so we keep the absence record
+    # (HR audit trail) even if the project is later removed.
+    project = models.ForeignKey(
+        'Project',
+        on_delete=models.SET_NULL,
+        null=True, blank=True,
+        related_name='absences',
+        help_text='Which project was this worker absent from? (optional)',
+    )
     date = models.DateField(default=timezone.now)
     reason = models.CharField(max_length=20, choices=REASON_CHOICES)
     notes = models.TextField(

core/templates/core/absences/edit.html

@@ -49,6 +49,12 @@ form.
                     {{ form.date }}
                     {{ form.date.errors }}
                 </div>
+                <div class="col-12 col-md-6">
+                    <label class="form-label" for="{{ form.project.id_for_label }}">Project (optional)</label>
+                    {{ form.project }}
+                    {{ form.project.errors }}
+                    <small class="text-muted">Which project was the worker absent from?</small>
+                </div>
                 <div class="col-12 col-md-6">
                     <label class="form-label" for="{{ form.reason.id_for_label }}">Reason</label>
                     {{ form.reason }}

core/templates/core/absences/list.html

@@ -120,6 +120,7 @@ has an inline delete form. CSV export button only shows for admin.
                     <tr>
                         <th>Date</th>
                         <th>Worker</th>
+                        <th>Project</th>
                         <th>Reason</th>
                         <th>Paid?</th>
                         <th>Logged by</th>
@@ -132,6 +133,9 @@ has an inline delete form. CSV export button only shows for admin.
                     <tr>
                         <td>{{ a.date|date:"d M Y" }}</td>
                         <td>{{ a.worker.name }}</td>
+                        {# Project column — shows the direct Absence.project FK, #}
+                        {# or an em-dash for non-project absences. #}
+                        <td class="text-muted">{{ a.project.name|default:"—" }}</td>
                         <td><span class="badge badge-absence-{{ a.reason }}">{{ a.get_reason_display }}</span></td>
                         <td>
                             {% if a.is_paid %}
@@ -156,7 +160,8 @@ has an inline delete form. CSV export button only shows for admin.
                         </td>
                     </tr>
                 {% empty %}
-                    <tr><td colspan="7" class="text-center text-muted py-4">No absences match the filters.</td></tr>
+                    {# Colspan bumped from 7 → 8 to cover the new Project column. #}
+                    <tr><td colspan="8" class="text-center text-muted py-4">No absences match the filters.</td></tr>
                 {% endfor %}
                 </tbody>
             </table>

core/templates/core/absences/log.html

@@ -72,6 +72,21 @@ them from the WorkLog).
 
             <hr class="my-3">
 
+            {# === PROJECT (optional) === #}
+            {# Slots above Reason — when set + Paid ticked, the auto-Bonus #}
+            {# inherits this project so paid-absence cost shows up against #}
+            {# the right project on payroll dashboards. #}
+            <div class="row g-3">
+                <div class="col-12 col-md-6">
+                    <label class="form-label" for="{{ form.project.id_for_label }}">Project (optional)</label>
+                    {{ form.project }}
+                    {{ form.project.errors }}
+                    <small class="text-muted">Which project was the worker absent from? Leave blank for non-project absences.</small>
+                </div>
+            </div>
+
+            <hr class="my-3">
+
             {# === REASON + PAID FLAG === #}
             <div class="row g-3">
                 <div class="col-12 col-md-6">

core/templates/core/absences/log_confirm.html

@@ -62,7 +62,12 @@ WorkLog intact, so partial-day cases work too.
 
             <hr>
             <p class="mb-2"><strong>{{ absence_count }} absence(s) will be created:</strong></p>
-            <p>Reason: <strong>{{ reason }}</strong>. Paid: <strong>{% if is_paid %}Yes{% else %}No{% endif %}</strong>.</p>
+            <p>
+                Reason: <strong>{{ reason }}</strong>.
+                Paid: <strong>{% if is_paid %}Yes{% else %}No{% endif %}</strong>.
+                {# Project line is conditional — older flows / non-project absences leave it blank. #}
+                {% if project_name %}Project: <strong>{{ project_name }}</strong>.{% endif %}
+            </p>
 
             <div class="d-flex justify-content-end gap-2 mt-3">
                 <a href="{% url 'absence_log' %}" class="btn btn-outline-secondary">&larr; Back to form</a>

core/tests.py

@@ -2435,3 +2435,139 @@ class AbsenceExportCSVTests(TestCase):
         self.client.force_login(self.sup)
         resp = self.client.get('/absences/export/')
         self.assertEqual(resp.status_code, 403)
+
+
+# =============================================================================
+# === ABSENCE PROJECT FK TESTS (Round B) ===
+# Tests for migration 0015_absence_project — adds an optional Project FK
+# to Absence so paid absences can be cost-attributed to the right project,
+# and so admin can filter "which workers were absent on Solar Farm X?".
+# =============================================================================
+class AbsenceProjectTests(TestCase):
+    """Round B — Absence.project FK + project propagation to Bonus adjustment."""
+
+    @classmethod
+    def setUpTestData(cls):
+        # Admin user for the form-submit tests.
+        cls.admin = User.objects.create_user(username='admin', password='pw', is_staff=True)
+        # Worker with a known daily rate (6000 / 20 = 300).
+        cls.worker = Worker.objects.create(
+            name='W', id_number='1', monthly_salary=Decimal('6000'),
+        )
+        # Project the absence will be linked to.
+        cls.project = Project.objects.create(name='Solar Farm Alpha')
+        # Team membership so worker is in the supervisor's reach if needed
+        # (not strictly required for these tests, but keeps the setup
+        # consistent with the rest of the absence-tests block above).
+        cls.team = Team.objects.create(name='T', supervisor=cls.admin)
+        cls.team.workers.add(cls.worker)
+
+    def test_project_on_absence_model_nullable(self):
+        """Absence.project is optional — can be None or a real project."""
+        # Default: project is null.
+        a = Absence.objects.create(worker=self.worker, reason='sick')
+        self.assertIsNone(a.project)
+        # Setting it works.
+        a.project = self.project
+        a.save()
+        a.refresh_from_db()
+        self.assertEqual(a.project, self.project)
+
+    def test_paid_absence_with_project_propagates_to_bonus(self):
+        """When is_paid=True, the auto-Bonus inherits absence.project for cost attribution."""
+        from core.views import _sync_absence_payroll_adjustment
+        a = Absence.objects.create(
+            worker=self.worker, reason='sick', is_paid=True, project=self.project,
+        )
+        _sync_absence_payroll_adjustment(a)
+        a.refresh_from_db()
+        # The Bonus adjustment carries the same project as the absence.
+        self.assertEqual(a.payroll_adjustment.project, self.project)
+        # And the adjustment is the right type at the right amount.
+        self.assertEqual(a.payroll_adjustment.type, 'Bonus')
+        self.assertEqual(a.payroll_adjustment.amount, Decimal('300.00'))
+
+    def test_log_form_accepts_project(self):
+        """POST /absences/log/ with a project ID creates the Absence with that FK set."""
+        self.client.force_login(self.admin)
+        resp = self.client.post('/absences/log/', data={
+            'date': '2026-05-14',
+            'reason': 'sick',
+            'project': self.project.id,
+            'workers': [self.worker.id],
+        })
+        # After successful save the view redirects to the list.
+        self.assertEqual(resp.status_code, 302)
+        # Exactly one absence — and it carries the project we picked.
+        a = Absence.objects.first()
+        self.assertIsNotNone(a)
+        self.assertEqual(a.project, self.project)
+
+    def test_edit_form_can_change_project(self):
+        """Edit form can add or change the project on an existing absence."""
+        self.client.force_login(self.admin)
+        # Start with no project link.
+        a = Absence.objects.create(worker=self.worker, date=_date(2026, 5, 14), reason='sick')
+        self.assertIsNone(a.project)
+        # Edit it — pick the project.
+        resp = self.client.post(f'/absences/{a.id}/edit/', data={
+            'worker': self.worker.id,
+            'date': '2026-05-14',
+            'project': self.project.id,
+            'reason': 'sick',
+            'notes': '',
+        })
+        # Redirects to list on success.
+        self.assertEqual(resp.status_code, 302)
+        a.refresh_from_db()
+        self.assertEqual(a.project, self.project)
+
+    def test_list_filter_by_project(self):
+        """?project=X filters absences by Absence.project_id directly (not via work_logs)."""
+        self.client.force_login(self.admin)
+        other_project = Project.objects.create(name='Other')
+        # Two absences, different projects.
+        Absence.objects.create(
+            worker=self.worker, date=_date(2026, 5, 1), reason='sick',
+            project=self.project,
+        )
+        Absence.objects.create(
+            worker=self.worker, date=_date(2026, 5, 2), reason='annual',
+            project=other_project,
+        )
+        # Filtering by self.project should show only the sick (matching)
+        # row and exclude the annual one. We check by looking at the
+        # 'page' object on the context — the rendered HTML also has
+        # badge CSS classes inline in <style>, so we can't substring-match
+        # on the class names alone (they appear in the style block even
+        # when there are no rows).
+        resp = self.client.get(f'/absences/?project={self.project.id}')
+        self.assertEqual(resp.status_code, 200)
+        page = resp.context['page']
+        # Only one row in the page (the sick one), and it belongs to
+        # `self.project` — proves the FK filter narrowed to direct matches.
+        rows = list(page.object_list)
+        self.assertEqual(len(rows), 1)
+        self.assertEqual(rows[0].reason, 'sick')
+        self.assertEqual(rows[0].project, self.project)
+
+    def test_log_form_paid_absence_propagates_project_to_bonus(self):
+        """Full chain: POST /absences/log/ with is_paid+project → Bonus has project.
+        Regression guard: someone refactoring _create_absences_atomic to forget
+        threading `project` through the helper would silently lose the project
+        link on the auto-created adjustment. This test exercises the entire
+        form → view → helper → adjustment chain."""
+        self.client.force_login(self.admin)
+        self.client.post('/absences/log/', data={
+            'date': '2026-05-14',
+            'reason': 'sick',
+            'is_paid': 'on',
+            'project': self.project.id,
+            'workers': [self.worker.id],
+        })
+        a = Absence.objects.first()
+        self.assertIsNotNone(a)
+        self.assertEqual(a.project, self.project)
+        self.assertIsNotNone(a.payroll_adjustment)
+        self.assertEqual(a.payroll_adjustment.project, self.project)
+        self.assertEqual(a.payroll_adjustment.type, 'Bonus')

core/views.py

@@ -4384,11 +4384,16 @@ def _sync_absence_payroll_adjustment(absence):
             return adj
 
         # Create a fresh Bonus adjustment at the worker's daily rate.
+        # Propagate the absence's project (if any) onto the adjustment so
+        # paid-absence costs show up against the right project on the
+        # payroll dashboard / project reports. PayrollAdjustment.project
+        # is already SET_NULL+nullable; passing None is fine.
         new_adj = PayrollAdjustment.objects.create(
             worker=absence.worker,
             type='Bonus',  # DB value (Title Case) — see CLAUDE.md naming-drift section
             amount=absence.worker.daily_rate,
             date=absence.date,
+            project=absence.project,  # cost-attribute the bonus to the same project
             description=f'Paid {absence.get_reason_display().lower()} — auto-created from Absence #{absence.id}',
         )
         absence.payroll_adjustment = new_adj
@@ -5229,6 +5234,10 @@ def absence_log(request):
     if request.method == 'POST':
         form = AbsenceLogForm(request.POST, user=request.user)
         if form.is_valid():
+            # Project is optional — store its ID (or None) into session as
+            # plain JSON-safe data, and pass the resolved Project object
+            # to the atomic helper.
+            project_obj = form.cleaned_data.get('project')
             conflicts = form.conflicting_worklogs()
             if conflicts:
                 # Stash + redirect to confirm page. We serialize dates as
@@ -5239,6 +5248,9 @@ def absence_log(request):
                     'reason': form.cleaned_data['reason'],
                     'is_paid': form.cleaned_data.get('is_paid') or False,
                     'notes': form.cleaned_data.get('notes') or '',
+                    # Stash the project ID (not the whole object — JSON-safe).
+                    # Resolved back to a Project in absence_log_confirm POST.
+                    'project_id': project_obj.id if project_obj else None,
                     'conflicts': [
                         {**c, 'date': c['date'].isoformat()} for c in conflicts
                     ],
@@ -5252,6 +5264,7 @@ def absence_log(request):
                 notes=form.cleaned_data.get('notes') or '',
                 user=request.user,
                 worklog_removals=[],
+                project=project_obj,
             )
             messages.success(request, f'{len(form.expanded_pairs())} absence(s) logged.')
             return redirect('absence_list')
@@ -5341,6 +5354,17 @@ def absence_log_confirm(request):
                     except ValueError:
                         # Malformed key — skip silently rather than 500
                         pass
+        # Re-resolve the project FK from the stashed ID. If the project
+        # was deleted between form submit and confirm POST, silently drop
+        # it (the absence stays valid, just without the project link).
+        project_id = pending.get('project_id')
+        project_obj = None
+        if project_id:
+            try:
+                project_obj = Project.objects.get(id=project_id)
+            except Project.DoesNotExist:
+                project_obj = None  # silently drop if deleted mid-flow
+
         _create_absences_atomic(
             pairs=pairs,
             reason=pending['reason'],
@@ -5348,6 +5372,7 @@ def absence_log_confirm(request):
             notes=pending['notes'],
             user=request.user,
             worklog_removals=removals,
+            project=project_obj,
         )
         # Clear the session blob now that the write succeeded — refreshing
         # the list page should not re-trigger anything.
@@ -5356,22 +5381,39 @@ def absence_log_confirm(request):
         return redirect('absence_list')
 
     # GET — render warning page using the stashed conflict list.
+    # Look up project name for display only — the actual project FK is
+    # re-resolved from session.project_id on POST. None when project_id
+    # is missing/deleted.
+    project_name = None
+    project_id = pending.get('project_id')
+    if project_id:
+        try:
+            project_name = Project.objects.get(id=project_id).name
+        except Project.DoesNotExist:
+            project_name = None
     return render(request, 'core/absences/log_confirm.html', {
         'conflicts': pending['conflicts'],
         'reason': pending['reason'],
         'is_paid': pending['is_paid'],
         'absence_count': len(pending['pairs']),
+        'project_name': project_name,
     })
 
 
-def _create_absences_atomic(pairs, reason, is_paid, notes, user, worklog_removals):
+def _create_absences_atomic(pairs, reason, is_paid, notes, user, worklog_removals, project=None):
     """Atomically: (1) remove flagged workers from WorkLogs, (2) create
     Absence rows, (3) sync payroll adjustments via the existing helper.
 
     The whole thing runs in a single transaction.atomic() block — if any
     step fails the entire batch rolls back, so we never end up with
     half-committed state (e.g. workers removed from WorkLogs but no
-    absences created, or absences created without their adjustments)."""
+    absences created, or absences created without their adjustments).
+
+    `project` (optional) is passed straight through onto every Absence
+    row created in this batch. When paid, the sync helper then
+    propagates it onto the auto-created Bonus PayrollAdjustment for
+    cost-attribution. None is fine — non-project absences just get a
+    null project FK."""
     with transaction.atomic():
         # Step 1: detach flagged workers from their conflicting WorkLogs.
         # If a WorkLog was deleted between form submit and confirm POST,
@@ -5388,6 +5430,7 @@ def _create_absences_atomic(pairs, reason, is_paid, notes, user, worklog_removal
             a = Absence.objects.create(
                 worker=worker, date=d, reason=reason,
                 is_paid=is_paid, notes=notes, logged_by=user,
+                project=project,
             )
             _sync_absence_payroll_adjustment(a)
 
@@ -5415,8 +5458,10 @@ def absence_list(request):
 
     # Base queryset — scoped to what this user is allowed to see, with
     # select_related on the FKs we render in the table to avoid N+1s.
+    # `project` is now a direct FK on Absence (since 0015_absence_project),
+    # so include it in select_related to render the column in one query.
     qs = _absence_user_queryset(user).select_related(
-        'worker', 'logged_by', 'payroll_adjustment'
+        'worker', 'logged_by', 'payroll_adjustment', 'project'
     )
 
     # === FILTERS ===
@@ -5443,7 +5488,15 @@ def absence_list(request):
     if team_id and team_id.isdigit():
         qs = qs.filter(worker__teams__id=team_id).distinct()
     if project_id and project_id.isdigit():
-        qs = qs.filter(worker__work_logs__project_id=project_id).distinct()
+        # Direct FK filter — was previously a transitive join via
+        # worker__work_logs__project_id, which was a workaround for not
+        # having Absence.project. Now that the FK exists, filter on it
+        # directly: matches absences explicitly linked to this project.
+        # (An absence whose worker happens to have worked on the project
+        # before but with a NULL absence.project will no longer appear —
+        # which is the correct behaviour: filter by what the absence
+        # says, not by adjacent activity.)
+        qs = qs.filter(project_id=project_id)
     if reasons:
         qs = qs.filter(reason__in=reasons)
     # parse_date() returns None for malformed input (e.g. "not-a-date")
@@ -5602,7 +5655,7 @@ def absence_export_csv(request):
     if not is_admin(request.user):
         return HttpResponseForbidden('Admin access required.')
 
-    qs = _absence_user_queryset(request.user).select_related('worker', 'logged_by')
+    qs = _absence_user_queryset(request.user).select_related('worker', 'logged_by', 'project')
 
     # ===========================================================
     # FILTER BLOCK — DUPLICATED from absence_list above.
@@ -5628,7 +5681,10 @@ def absence_export_csv(request):
     if team_id and team_id.isdigit():
         qs = qs.filter(worker__teams__id=team_id).distinct()
     if project_id and project_id.isdigit():
-        qs = qs.filter(worker__work_logs__project_id=project_id).distinct()
+        # Direct FK filter — was previously worker__work_logs__project_id
+        # (a workaround for not having Absence.project). Now uses the
+        # direct FK. Mirrors absence_list above for filter parity.
+        qs = qs.filter(project_id=project_id)
     if reasons:
         qs = qs.filter(reason__in=reasons)
     if date_from:
@@ -5647,11 +5703,13 @@ def absence_export_csv(request):
     resp = HttpResponse(content_type='text/csv')
     resp['Content-Disposition'] = 'attachment; filename="absences.csv"'
     writer = csv.writer(resp)
-    writer.writerow(['Worker', 'Date', 'Reason', 'Paid', 'Notes', 'Logged By'])
+    # Project column added — mirrors the on-screen list table.
+    writer.writerow(['Worker', 'Date', 'Project', 'Reason', 'Paid', 'Notes', 'Logged By'])
     for a in qs:
         writer.writerow([
             a.worker.name,
             a.date.isoformat(),
+            a.project.name if a.project else '',
             a.get_reason_display(),
             'Yes' if a.is_paid else 'No',
             a.notes,