Limit decoders selection to model manufacturers

ram/metadata/migrations/0002_alter_decoder_manufacturer.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.0.6 on 2022-07-10 21:46
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('metadata', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='decoder',
+            name='manufacturer',
+            field=models.ForeignKey(limit_choices_to={'category': 'model'}, on_delete=django.db.models.deletion.CASCADE, to='metadata.manufacturer'),
+        ),
+    ]