Add documents to decoders (#22)

* Add decoder documents support
* Use abstract model for Documents
* Increase version
* Code cleanup

ram/metadata/admin.py

@@ -4,6 +4,7 @@ from adminsortable2.admin import SortableAdminMixin
 from metadata.models import (
     Property,
     Decoder,
+    DecoderDocument,
     Scale,
     Manufacturer,
     Company,
@@ -17,8 +18,16 @@ class PropertyAdmin(admin.ModelAdmin):
     search_fields = ("name",)
 
 
+class DecoderDocInline(admin.TabularInline):
+    model = DecoderDocument
+    min_num = 0
+    extra = 0
+    classes = ["collapse"]
+
+
 @admin.register(Decoder)
 class DecoderAdmin(admin.ModelAdmin):
+    inlines = (DecoderDocInline,)
     readonly_fields = ("image_thumbnail",)
     list_display = ("__str__", "sound")
     list_filter = ("manufacturer", "sound")

ram/metadata/migrations/0012_alter_decoder_manufacturer_decoderdocument.py

@@ -0,0 +1,59 @@
+# Generated by Django 4.2 on 2023-09-30 21:54
+
+from django.db import migrations, models
+import django.db.models.deletion
+import ram.utils
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("metadata", "0011_company_slug_and_more"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="decoder",
+            name="manufacturer",
+            field=models.ForeignKey(
+                limit_choices_to={"category": "accessory"},
+                on_delete=django.db.models.deletion.CASCADE,
+                to="metadata.manufacturer",
+            ),
+        ),
+        migrations.CreateModel(
+            name="DecoderDocument",
+            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(
+                        blank=True,
+                        null=True,
+                        storage=ram.utils.DeduplicatedStorage(),
+                        upload_to="files/",
+                    ),
+                ),
+                (
+                    "decoder",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="document",
+                        to="metadata.decoder",
+                    ),
+                ),
+            ],
+            options={
+                "unique_together": {("decoder", "file")},
+            },
+        ),
+    ]

ram/metadata/models.py

@@ -1,11 +1,10 @@
-from urllib.parse import quote
-
 from django.db import models
 from django.urls import reverse
 from django.conf import settings
 from django.dispatch.dispatcher import receiver
 from django_countries.fields import CountryField
 
+from ram.models import Document
 from ram.utils import DeduplicatedStorage, get_image_preview, slugify
 
 
@@ -88,7 +87,7 @@ class Decoder(models.Model):
     manufacturer = models.ForeignKey(
         Manufacturer,
         on_delete=models.CASCADE,
-        limit_choices_to={"category": "model"},
+        limit_choices_to={"category": "accessory"},
     )
     version = models.CharField(max_length=64, blank=True)
     sound = models.BooleanField(default=False)
@@ -105,6 +104,15 @@ class Decoder(models.Model):
     image_thumbnail.short_description = "Preview"
 
 
+class DecoderDocument(Document):
+    decoder = models.ForeignKey(
+        Decoder, on_delete=models.CASCADE, related_name="document"
+    )
+
+    class Meta:
+        unique_together = ("decoder", "file")
+
+
 class Scale(models.Model):
     scale = models.CharField(max_length=32, unique=True)
     slug = models.CharField(max_length=32, unique=True, editable=False)
@@ -167,7 +175,6 @@ class Tag(models.Model):
         )
 
 
-
 @receiver(models.signals.pre_save, sender=Manufacturer)
 @receiver(models.signals.pre_save, sender=Company)
 @receiver(models.signals.pre_save, sender=Scale)