Migrate some models in a new app

dcc/metadata/admin.py

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+from django.contrib import admin
+from metadata.models import Decoder, Manufacturer, Company
+
+admin.site.register(Decoder)
+admin.site.register(Company)
+admin.site.register(Manufacturer)

dcc/metadata/apps.py

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+from django.apps import AppConfig
+
+
+class MetadataConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'metadata'

dcc/metadata/migrations/0001_initial.py

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+# Generated by Django 4.0 on 2021-12-20 21:37
+
+from django.db import migrations, models
+import django.db.models.deletion
+import django_countries.fields
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Company',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=128, unique=True)),
+                ('country', django_countries.fields.CountryField(max_length=2)),
+            ],
+            options={
+                'verbose_name_plural': 'Companies',
+            },
+        ),
+        migrations.CreateModel(
+            name='Manufacturer',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=128, unique=True)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Decoder',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=128, unique=True)),
+                ('manufacturer', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='metadata.manufacturer')),
+            ],
+        ),
+    ]

dcc/metadata/migrations/0002_decoder_version.py

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+# Generated by Django 4.0 on 2021-12-20 21:42
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('metadata', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='decoder',
+            name='version',
+            field=models.CharField(blank=True, max_length=64),
+        ),
+    ]

dcc/metadata/models.py

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+from django.db import models
+from django_countries.fields import CountryField
+
+
+class Manufacturer(models.Model):
+    name = models.CharField(max_length=128, unique=True)
+
+    def __str__(self):
+        return self.name
+
+
+class Company(models.Model):
+    name = models.CharField(max_length=128, unique=True)
+    country = CountryField()
+
+    class Meta:
+        verbose_name_plural = "Companies"
+
+    def __str__(self):
+        return self.name
+
+
+class Decoder(models.Model):
+    name = models.CharField(max_length=128, unique=True)
+    manufacturer = models.ForeignKey(
+        Manufacturer,
+        on_delete=models.CASCADE)
+    version = models.CharField(max_length=64, blank=True)
+
+    def __str__(self):
+        return "{0} - {1}".format(self.manufacturer, self.name)

dcc/metadata/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

dcc/metadata/views.py

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+from django.shortcuts import render
+
+# Create your views here.