feat: Add Link model

netbox_cmdb/netbox_cmdb/migrations/0039_link.py

@@ -0,0 +1,27 @@
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('netbox_cmdb', '0038_portlayout'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Link',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('created', models.DateTimeField(auto_now_add=True, null=True)),
+                ('last_updated', models.DateTimeField(auto_now=True, null=True)),
+                ('state', models.CharField(default='staging', max_length=50)),
+                ('monitoring_state', models.CharField(default='disabled', max_length=50)),
+                ('interface_a', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='%(class)s_interface_a', to='netbox_cmdb.deviceinterface')),
+                ('interface_b', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='%(class)s_interface_b', to='netbox_cmdb.deviceinterface')),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+    ]

netbox_cmdb/netbox_cmdb/models/interface.py

@@ -2,6 +2,8 @@
 from django.db import models
 from netbox.models import ChangeLoggedModel
 
+from netbox_cmdb.choices import AssetMonitoringStateChoices, AssetStateChoices
+
 FEC_CHOICES = [
     (None, "None"),
     ("rs", "Reed Solomon"),
@@ -123,6 +125,36 @@ class Meta:
         unique_together = ("index", "parent_interface")
 
 
+class Link(ChangeLoggedModel):
+    """A link between two DeviceInterface."""
+
+    interface_a = models.ForeignKey(
+        to="DeviceInterface",
+        related_name="%(class)s_interface_a",
+        on_delete=models.CASCADE,
+    )
+    interface_b = models.ForeignKey(
+        to="DeviceInterface",
+        related_name="%(class)s_interface_b",
+        on_delete=models.CASCADE,
+    )
+    state = models.CharField(
+        max_length=50,
+        choices=AssetStateChoices,
+        default=AssetStateChoices.STATE_STAGING,
+        help_text="State of this Link",
+    )
+    monitoring_state = models.CharField(
+        max_length=50,
+        choices=AssetMonitoringStateChoices,
+        default=AssetMonitoringStateChoices.DISABLED,
+        help_text="Monitoring state of this Link",
+    )
+
+    def __str__(self):
+        return str(f"{self.interface_a} <--> {self.interface_b}")
+
+
 class PortLayout(ChangeLoggedModel):
     """A port layout configuration on a Network device."""