Add support for generic documents (admin only) (#44)

* Add support for generic documents
* Add publish / unpublish actions
* Minor improvements to models properties

ram/metadata/admin.py

@@ -1,6 +1,7 @@
 from django.contrib import admin
 from adminsortable2.admin import SortableAdminMixin
 
+from ram.admin import publish, unpublish
 from metadata.models import (
     Property,
     Decoder,
@@ -10,6 +11,7 @@ from metadata.models import (
     Company,
     Tag,
     RollingStockType,
+    GenericDocument,
 )
 
 
@@ -70,3 +72,20 @@ class RollingStockTypeAdmin(SortableAdminMixin, admin.ModelAdmin):
     list_display = ("__str__",)
     list_filter = ("type", "category")
     search_fields = ("type", "category")
+
+
+@admin.register(GenericDocument)
+class GenericDocumentAdmin(admin.ModelAdmin):
+    readonly_fields = ("size",)
+    list_display = (
+        "__str__",
+        "description",
+        "private",
+        "size",
+        "download",
+    )
+    search_fields = (
+        "description",
+        "file",
+    )
+    actions = [publish, unpublish]

ram/metadata/migrations/0021_genericdocument.py

@@ -0,0 +1,40 @@
+# Generated by Django 5.1.4 on 2025-01-17 09:31
+
+import ram.utils
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("metadata", "0020_alter_decoderdocument_unique_together_and_more"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="GenericDocument",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("description", models.CharField(blank=True, max_length=128)),
+                (
+                    "file",
+                    models.FileField(
+                        storage=ram.utils.DeduplicatedStorage(), upload_to="files/"
+                    ),
+                ),
+                ("private", models.BooleanField(default=False)),
+                ("tags", models.ManyToManyField(blank=True, to="metadata.tag")),
+            ],
+            options={
+                "verbose_name_plural": "Generic Documents",
+            },
+        ),
+    ]

ram/metadata/models.py

@@ -236,6 +236,13 @@ class Tag(models.Model):
         )
 
 
+class GenericDocument(Document):
+    tags = models.ManyToManyField(Tag, blank=True)
+
+    class Meta:
+        verbose_name_plural = "Generic Documents"
+
+
 @receiver(models.signals.pre_save, sender=Manufacturer)
 @receiver(models.signals.pre_save, sender=Company)
 @receiver(models.signals.pre_save, sender=Scale)