✨(backend) add file type fixtures to create_demo

The --file-types flag creates one fixture per category (docx, xlsx,
pptx, pdf, image, video, zip, mp3, binary) so developers can populate
a local demo database covering all filter-relevant types, without
having to upload real files manually.

src/backend/demo/management/commands/create_demo.py

@@ -1,4 +1,3 @@
-# ruff: noqa: S106
 """create_demo management command"""
 
 import logging
@@ -19,6 +18,72 @@ from demo import defaults
 fake = Faker()
 
 logger = logging.getLogger(__file__)
+DEFAULT_PARENT = object()
+
+
+FILE_TYPE_ITEMS = (
+    {
+        "title": "Demo text document",
+        "filename": "demo-text-document.docx",
+        "mimetype": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+    },
+    {
+        "title": "Demo spreadsheet",
+        "filename": "demo-spreadsheet.xlsx",
+        "mimetype": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+    },
+    {
+        "title": "Demo presentation",
+        "filename": "demo-presentation.pptx",
+        "mimetype": "application/vnd.openxmlformats-officedocument.presentationml.presentation",
+    },
+    {
+        "title": "Demo PDF",
+        "filename": "demo-pdf.pdf",
+        "mimetype": "application/pdf",
+    },
+    {
+        "title": "Demo image",
+        "filename": "demo-image.png",
+        "mimetype": "image/png",
+    },
+    {
+        "title": "Demo video",
+        "filename": "demo-video.mp4",
+        "mimetype": "video/mp4",
+    },
+    {
+        "title": "Demo archive",
+        "filename": "demo-archive.zip",
+        "mimetype": "application/zip",
+    },
+    {
+        "title": "Demo audio",
+        "filename": "demo-audio.mp3",
+        "mimetype": "audio/mpeg",
+    },
+    {
+        "title": "Demo other file",
+        "filename": "demo-other.bin",
+        "mimetype": "application/octet-stream",
+    },
+)
+
+
+def get_or_create_demo_user(email):
+    """Get an existing demo user or create it when absent."""
+    user, _created = models.User.objects.get_or_create(
+        sub=email,
+        defaults={
+            "admin_email": email,
+            "email": email,
+            "password": "!",
+            "is_superuser": False,
+            "is_active": True,
+            "is_staff": False,
+        },
+    )
+    return user
 
 
 class Timeit:
@@ -67,56 +132,51 @@ def create_users():
     """Create random users"""
     for user_id in range(defaults.NB_OBJECTS["users"]):
         email = f"user.test{user_id:d}@example.com"
-        yield factories.UserFactory(
+        yield get_or_create_demo_user(email)
-            admin_email=email,
-            email=email,
-            sub=email,
-            password="!",
-            is_superuser=False,
-            is_active=True,
-            is_staff=False,
-        )
 
 
 def create_dev_users():
     """Create development users"""
     for dev_user in defaults.DEV_USERS:
         email = dev_user["email"]
-        user = factories.UserFactory(
+        user = get_or_create_demo_user(email)
-            admin_email=email,
-            email=email,
-            sub=email,
-            password="!",
-            is_superuser=False,
-            is_active=True,
-            is_staff=False,
-        )
 
         create_item(user)
         yield user
 
 
-def create_item(user):
+def create_item(
+    user,
+    title=None,
+    file_data=None,
+    parent=DEFAULT_PARENT,
+):
     """Create file item with the given user as creator"""
-    parent = factories.ItemFactory(
+    file_data = file_data or {}
-        creator=user,
+    content = file_data.get("content") or fake.sentence(nb_words=50).encode()
-        users=[(user, models.RoleChoices.OWNER)],
+    if parent is DEFAULT_PARENT:
-        type=models.ItemTypeChoices.FOLDER,
+        parent = factories.ItemFactory(
-    )
+            creator=user,
+            users=[(user, models.RoleChoices.OWNER)],
+            type=models.ItemTypeChoices.FOLDER,
+        )
+
     item = factories.ItemFactory(
         type=models.ItemTypeChoices.FILE,
         update_upload_state=models.ItemUploadStateChoices.READY,
         link_reach=models.LinkReachChoices.AUTHENTICATED,
         link_role=models.LinkRoleChoices.READER,
         creator=user,
+        users=[(user, models.RoleChoices.OWNER)] if parent is None else None,
         parent=parent,
-        title=fake.sentence(nb_words=4),
+        title=title or fake.sentence(nb_words=4),
-        filename="content.txt",
+        filename=file_data.get("filename", "content.txt"),
         description=fake.sentence(nb_words=10),
-        mimetype="text/plain",
+        mimetype=file_data.get("mimetype", "text/plain"),
+        size=len(content),
     )
 
-    default_storage.save(item.file_key, BytesIO(fake.sentence(nb_words=50).encode()))
+    default_storage.save(item.file_key, BytesIO(content))
 
     return item
 
@@ -128,7 +188,22 @@ def create_items(users):
         yield create_item(user)
 
 
-def create_demo(stdout):
+def create_file_type_items(user):
+    """Create one ready file for each file type category described in issue #597."""
+    for file_type_item in FILE_TYPE_ITEMS:
+        yield create_item(
+            user,
+            title=file_type_item["title"],
+            file_data={
+                "filename": file_type_item["filename"],
+                "mimetype": file_type_item["mimetype"],
+                "content": f"{file_type_item['title']} fixture".encode(),
+            },
+            parent=None,
+        )
+
+
+def create_demo(stdout, *, file_types=False):
     """
     Create a database with demo data for developers to work in a realistic environment.
     """
@@ -152,6 +227,28 @@ def create_demo(stdout):
                     role=models.RoleChoices.READER,
                 )
 
+    if file_types:
+        with Timeit(stdout, "Creating file type items"):
+            list(create_file_type_items(dev_users[0]))
+
+    with Timeit(stdout, "Sharing development users items with demo users"):
+        dev_items = models.Item.objects.filter(
+            creator__in=dev_users, type=models.ItemTypeChoices.FILE
+        ).exclude(accesses__user__in=users)
+        for item in dev_items:
+            nb_users = secrets.randbelow(len(users)) + 1
+            shared_users = fake.random_sample(elements=users, length=nb_users)
+            for user in shared_users:
+                factories.UserItemAccessFactory(
+                    item=item,
+                    user=user,
+                    role=models.RoleChoices.READER,
+                )
+
+            names = ", ".join(user.short_name for user in shared_users)
+            item.title = f"{item.title} (shared with {names})"
+            item.save(update_fields=["title"])
+
 
 class Command(BaseCommand):
     """A management command to create a demo database."""
@@ -167,6 +264,13 @@ class Command(BaseCommand):
             default=False,
             help="Force command execution despite DEBUG is set to False",
         )
+        parser.add_argument(
+            "--file_types",
+            "--file-types",
+            action="store_true",
+            default=False,
+            help="Create items for several file types",
+        )
 
     def handle(self, *args, **options):
         """Handling of the management command."""
@@ -178,4 +282,7 @@ class Command(BaseCommand):
                 )
             )
 
-        create_demo(self.stdout)
+        create_demo(
+            self.stdout,
+            file_types=options["file_types"],
+        )

src/backend/demo/tests/test_commands_create_demo.py

@@ -8,6 +8,7 @@ from django.test import override_settings
 import pytest
 
 from core import models
+from demo.management.commands.create_demo import FILE_TYPE_ITEMS
 
 pytestmark = pytest.mark.django_db
 
@@ -32,3 +33,50 @@ def test_commands_create_demo():
     # assert dev users have doc accesses
     user = models.User.objects.get(email="drive@drive.world")
     assert models.ItemAccess.objects.filter(user=user).exists()
+
+
+@override_settings(DEBUG=True)
+def test_commands_create_demo_shares_dev_users_items_with_demo_users():
+    """The create_demo command should share existing dev users items with demo users."""
+    call_command("create_demo")
+
+    dev_user = models.User.objects.get(email="drive@drive.world")
+    dev_items = models.Item.objects.filter(creator=dev_user, type=models.ItemTypeChoices.FILE)
+    assert dev_items.count() == 2
+    for item in dev_items:
+        assert models.ItemAccess.objects.filter(item=item).exclude(user=dev_user).exists()
+
+
+@override_settings(DEBUG=True)
+def test_commands_create_demo_with_file_types():
+    """The create_demo command should optionally add files for filter development."""
+    call_command("create_demo", "--file_types")
+
+    expected_filenames = {item["filename"] for item in FILE_TYPE_ITEMS}
+    expected_mimetypes = {item["mimetype"] for item in FILE_TYPE_ITEMS}
+    file_type_items = models.Item.objects.filter(filename__in=expected_filenames)
+
+    assert file_type_items.count() == len(FILE_TYPE_ITEMS)
+    assert set(file_type_items.values_list("mimetype", flat=True)) == expected_mimetypes
+    assert all(item.is_root for item in file_type_items)
+
+    dev_user = models.User.objects.get(email="drive@drive.world")
+    for item in file_type_items:
+        assert models.ItemAccess.objects.filter(item=item).exclude(user=dev_user).exists()
+
+
+@mock.patch(
+    "demo.defaults.NB_OBJECTS",
+    {
+        "users": 10,
+        "files": 10,
+        "max_users_per_document": 5,
+    },
+)
+@override_settings(DEBUG=True)
+def test_commands_create_demo_can_be_run_twice_without_resetting_database():
+    """The create_demo command should reuse deterministic demo users."""
+    call_command("create_demo", "--file_types")
+    call_command("create_demo", "--file_types")
+
+    assert models.User.objects.filter(email="drive@drive.world").count() == 1