commit accefa25339dcf6f044b741b46209f1e19bff3dd
Author: Adrian A. Baumann <ade@adebaumann.com>
Date:   Sun Dec 28 13:04:37 2025 +0100

    Initial commit: Django project with boxes app
    
    - Set up Django 5.2.9 project structure
    - Add boxes app with Box and BoxType models
    - Box: alphanumeric ID (max 10 chars) with foreign key to BoxType
    - BoxType: name and dimensions (width/height/length in mm)
    - Configure admin interface for both models
    - Add comprehensive test suite (14 tests)

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ceeb3e7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,18 @@
+__pycache__/
+**/*.pyc
+lib/
+lib64
+bin/
+pyvenv.cfg
+include/
+keys/
+.venv/
+.idea/
+*.kate-swp
+node_modules/
+package-lock.json
+package.json
+AGENT*.md
+# Diagram cache directory
+.env
+data/db.sqlite3
diff --git a/boxes/__init__.py b/boxes/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/boxes/admin.py b/boxes/admin.py
new file mode 100644
index 0000000..b7e40f9
--- /dev/null
+++ b/boxes/admin.py
@@ -0,0 +1,20 @@
+from django.contrib import admin
+
+from .models import Box, BoxType
+
+
+@admin.register(BoxType)
+class BoxTypeAdmin(admin.ModelAdmin):
+    """Admin configuration for BoxType model."""
+
+    list_display = ('name', 'width', 'height', 'length')
+    search_fields = ('name',)
+
+
+@admin.register(Box)
+class BoxAdmin(admin.ModelAdmin):
+    """Admin configuration for Box model."""
+
+    list_display = ('id', 'box_type')
+    list_filter = ('box_type',)
+    search_fields = ('id',)
diff --git a/boxes/apps.py b/boxes/apps.py
new file mode 100644
index 0000000..1077976
--- /dev/null
+++ b/boxes/apps.py
@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class BoxesConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'boxes'
diff --git a/boxes/migrations/0001_initial.py b/boxes/migrations/0001_initial.py
new file mode 100644
index 0000000..3ac5269
--- /dev/null
+++ b/boxes/migrations/0001_initial.py
@@ -0,0 +1,38 @@
+# Generated by Django 5.2.9 on 2025-12-28 12:01
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='BoxType',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=255)),
+                ('width', models.PositiveIntegerField(help_text='Width in millimeters')),
+                ('height', models.PositiveIntegerField(help_text='Height in millimeters')),
+                ('length', models.PositiveIntegerField(help_text='Length in millimeters')),
+            ],
+            options={
+                'ordering': ['name'],
+            },
+        ),
+        migrations.CreateModel(
+            name='Box',
+            fields=[
+                ('id', models.CharField(help_text='Alphanumeric identifier (max 10 characters)', max_length=10, primary_key=True, serialize=False)),
+                ('box_type', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='boxes', to='boxes.boxtype')),
+            ],
+            options={
+                'verbose_name_plural': 'boxes',
+            },
+        ),
+    ]
diff --git a/boxes/migrations/__init__.py b/boxes/migrations/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/boxes/models.py b/boxes/models.py
new file mode 100644
index 0000000..219cbce
--- /dev/null
+++ b/boxes/models.py
@@ -0,0 +1,37 @@
+from django.db import models
+
+
+class BoxType(models.Model):
+    """A type of storage box with specific dimensions."""
+
+    name = models.CharField(max_length=255)
+    width = models.PositiveIntegerField(help_text='Width in millimeters')
+    height = models.PositiveIntegerField(help_text='Height in millimeters')
+    length = models.PositiveIntegerField(help_text='Length in millimeters')
+
+    class Meta:
+        ordering = ['name']
+
+    def __str__(self):
+        return self.name
+
+
+class Box(models.Model):
+    """A storage box in the lab."""
+
+    id = models.CharField(
+        max_length=10,
+        primary_key=True,
+        help_text='Alphanumeric identifier (max 10 characters)'
+    )
+    box_type = models.ForeignKey(
+        BoxType,
+        on_delete=models.PROTECT,
+        related_name='boxes'
+    )
+
+    class Meta:
+        verbose_name_plural = 'boxes'
+
+    def __str__(self):
+        return self.id
diff --git a/boxes/tests.py b/boxes/tests.py
new file mode 100644
index 0000000..51974df
--- /dev/null
+++ b/boxes/tests.py
@@ -0,0 +1,130 @@
+from django.contrib.admin.sites import AdminSite
+from django.db import IntegrityError
+from django.test import TestCase
+
+from .admin import BoxAdmin, BoxTypeAdmin
+from .models import Box, BoxType
+
+
+class BoxTypeModelTests(TestCase):
+    """Tests for the BoxType model."""
+
+    def setUp(self):
+        """Set up test fixtures."""
+        self.box_type = BoxType.objects.create(
+            name='Small Box',
+            width=100,
+            height=50,
+            length=150
+        )
+
+    def test_box_type_str_returns_name(self):
+        """BoxType __str__ should return the name."""
+        self.assertEqual(str(self.box_type), 'Small Box')
+
+    def test_box_type_creation(self):
+        """BoxType should be created with correct attributes."""
+        self.assertEqual(self.box_type.name, 'Small Box')
+        self.assertEqual(self.box_type.width, 100)
+        self.assertEqual(self.box_type.height, 50)
+        self.assertEqual(self.box_type.length, 150)
+
+    def test_box_type_ordering(self):
+        """BoxTypes should be ordered by name."""
+        BoxType.objects.create(name='Alpha Box', width=10, height=10, length=10)
+        BoxType.objects.create(name='Zeta Box', width=20, height=20, length=20)
+        box_types = list(BoxType.objects.values_list('name', flat=True))
+        self.assertEqual(box_types, ['Alpha Box', 'Small Box', 'Zeta Box'])
+
+
+class BoxModelTests(TestCase):
+    """Tests for the Box model."""
+
+    def setUp(self):
+        """Set up test fixtures."""
+        self.box_type = BoxType.objects.create(
+            name='Standard Box',
+            width=200,
+            height=100,
+            length=300
+        )
+        self.box = Box.objects.create(
+            id='BOX001',
+            box_type=self.box_type
+        )
+
+    def test_box_str_returns_id(self):
+        """Box __str__ should return the box ID."""
+        self.assertEqual(str(self.box), 'BOX001')
+
+    def test_box_creation(self):
+        """Box should be created with correct attributes."""
+        self.assertEqual(self.box.id, 'BOX001')
+        self.assertEqual(self.box.box_type, self.box_type)
+
+    def test_box_type_relationship(self):
+        """Box should be accessible from BoxType via related_name."""
+        self.assertIn(self.box, self.box_type.boxes.all())
+
+    def test_box_id_max_length(self):
+        """Box ID should accept up to 10 characters."""
+        box = Box.objects.create(id='ABCD123456', box_type=self.box_type)
+        self.assertEqual(len(box.id), 10)
+
+    def test_box_type_protect_on_delete(self):
+        """Deleting a BoxType with boxes should raise IntegrityError."""
+        with self.assertRaises(IntegrityError):
+            self.box_type.delete()
+
+    def test_box_type_delete_when_no_boxes(self):
+        """Deleting a BoxType without boxes should succeed."""
+        empty_type = BoxType.objects.create(
+            name='Empty Type',
+            width=10,
+            height=10,
+            length=10
+        )
+        empty_type_id = empty_type.id
+        empty_type.delete()
+        self.assertFalse(BoxType.objects.filter(id=empty_type_id).exists())
+
+
+class BoxTypeAdminTests(TestCase):
+    """Tests for the BoxType admin configuration."""
+
+    def setUp(self):
+        """Set up test fixtures."""
+        self.site = AdminSite()
+        self.admin = BoxTypeAdmin(BoxType, self.site)
+
+    def test_list_display(self):
+        """BoxTypeAdmin should display correct fields."""
+        self.assertEqual(
+            self.admin.list_display,
+            ('name', 'width', 'height', 'length')
+        )
+
+    def test_search_fields(self):
+        """BoxTypeAdmin should search by name."""
+        self.assertEqual(self.admin.search_fields, ('name',))
+
+
+class BoxAdminTests(TestCase):
+    """Tests for the Box admin configuration."""
+
+    def setUp(self):
+        """Set up test fixtures."""
+        self.site = AdminSite()
+        self.admin = BoxAdmin(Box, self.site)
+
+    def test_list_display(self):
+        """BoxAdmin should display correct fields."""
+        self.assertEqual(self.admin.list_display, ('id', 'box_type'))
+
+    def test_list_filter(self):
+        """BoxAdmin should filter by box_type."""
+        self.assertEqual(self.admin.list_filter, ('box_type',))
+
+    def test_search_fields(self):
+        """BoxAdmin should search by id."""
+        self.assertEqual(self.admin.search_fields, ('id',))
diff --git a/boxes/views.py b/boxes/views.py
new file mode 100644
index 0000000..91ea44a
--- /dev/null
+++ b/boxes/views.py
@@ -0,0 +1,3 @@
+from django.shortcuts import render
+
+# Create your views here.
diff --git a/labhelper/__init__.py b/labhelper/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/labhelper/asgi.py b/labhelper/asgi.py
new file mode 100644
index 0000000..f2927a1
--- /dev/null
+++ b/labhelper/asgi.py
@@ -0,0 +1,16 @@
+"""
+ASGI config for labhelper project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/5.2/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'labhelper.settings')
+
+application = get_asgi_application()
diff --git a/labhelper/settings.py b/labhelper/settings.py
new file mode 100644
index 0000000..c525dae
--- /dev/null
+++ b/labhelper/settings.py
@@ -0,0 +1,123 @@
+"""
+Django settings for labhelper project.
+
+Generated by 'django-admin startproject' using Django 5.2.9.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/5.2/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/5.2/ref/settings/
+"""
+
+from pathlib import Path
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/5.2/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = 'django-insecure-t1kymy8ugqnj$li2knhha0@gc5v8f3bge=$+gbybj2$jt28uqm'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'boxes',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'labhelper.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'labhelper.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/5.2/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': BASE_DIR / 'db.sqlite3',
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/5.2/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/5.2/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/5.2/howto/static-files/
+
+STATIC_URL = 'static/'
+
+# Default primary key field type
+# https://docs.djangoproject.com/en/5.2/ref/settings/#default-auto-field
+
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
diff --git a/labhelper/urls.py b/labhelper/urls.py
new file mode 100644
index 0000000..9fed267
--- /dev/null
+++ b/labhelper/urls.py
@@ -0,0 +1,22 @@
+"""
+URL configuration for labhelper project.
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/5.2/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import path
+
+urlpatterns = [
+    path('admin/', admin.site.urls),
+]
diff --git a/labhelper/wsgi.py b/labhelper/wsgi.py
new file mode 100644
index 0000000..c08e5b2
--- /dev/null
+++ b/labhelper/wsgi.py
@@ -0,0 +1,16 @@
+"""
+WSGI config for labhelper project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/5.2/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'labhelper.settings')
+
+application = get_wsgi_application()
diff --git a/manage.py b/manage.py
new file mode 100755
index 0000000..8b8b9c4
--- /dev/null
+++ b/manage.py
@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'labhelper.settings')
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..d76e079
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,36 @@
+appdirs==1.4.4
+asgiref==3.8.1
+blessed==1.21.0
+certifi==2025.8.3
+charset-normalizer==3.4.3
+curtsies==0.4.3
+cwcwidth==0.1.10
+Django==5.2.9
+django-admin-sortable2==2.2.8
+django-js-asset==3.1.2
+django-mptt==0.17.0
+django-mptt-admin==2.8.0
+django-nested-admin==4.1.1
+django-nested-inline==0.4.6
+django-revproxy==0.13.0
+greenlet==3.2.4
+gunicorn==23.0.0
+idna==3.10
+jedi==0.19.2
+Markdown==3.8.2
+packaging==25.0
+parsedatetime==2.6
+parso==0.8.4
+pep8==1.7.1
+prompt_toolkit==3.0.51
+Pygments==2.19.2
+python-dateutil==2.9.0.post0
+python-monkey-business==1.1.0
+pyxdg==0.28
+requests==2.32.5
+six==1.17.0
+sqlparse==0.5.3
+urllib3==2.6.0
+wcwidth==0.2.13
+bleach==6.1.0
+coverage==7.6.1