139 label code generieren und im device detail anzeigen (#141)

* added ModelCounter

* changed post url back to datahub

* changed model filed type to int

* added QR-Code Text field

* added get_device_name to Device model

* format qr-code in device detail

* add dev api device initial station info test

* create change log for device and user

* #84 display logs for Organization, room and user

* #143 save when device is saved assign name if model is set

* #144

---------

Co-authored-by: Nik Sauer <[email protected]>
Co-authored-by: Silvio Heinze <[email protected]>

app/devices/migrations/0017_modelcounter_device_auto_number.py

@@ -0,0 +1,26 @@
+# Generated by Django 5.1.5 on 2025-01-30 10:12
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('devices', '0016_alter_device_current_campaign_and_more'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ModelCounter',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('model', models.CharField(max_length=255, unique=True)),
+                ('last_auto_number', models.IntegerField(default=0)),
+            ],
+        ),
+        migrations.AddField(
+            model_name='device',
+            name='auto_number',
+            field=models.IntegerField(blank=True, null=True),
+        ),
+    ]

app/devices/migrations/0018_remove_modelcounter_id_alter_modelcounter_model.py

@@ -0,0 +1,22 @@
+# Generated by Django 5.1.5 on 2025-01-30 10:22
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('devices', '0017_modelcounter_device_auto_number'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='modelcounter',
+            name='id',
+        ),
+        migrations.AlterField(
+            model_name='modelcounter',
+            name='model',
+            field=models.CharField(max_length=255, primary_key=True, serialize=False),
+        ),
+    ]

app/devices/migrations/0019_alter_device_model_alter_modelcounter_model.py

@@ -0,0 +1,23 @@
+# Generated by Django 5.1.5 on 2025-01-30 10:47
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('devices', '0018_remove_modelcounter_id_alter_modelcounter_model'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='device',
+            name='model',
+            field=models.IntegerField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='modelcounter',
+            name='model',
+            field=models.IntegerField(primary_key=True, serialize=False),
+        ),
+    ]

app/devices/models.py

@@ -1,4 +1,4 @@
-from django.db import models
+from django.db import models, transaction
 from django.utils import timezone
 from organizations.models import Organization
 from campaign.models import Room
@@ -7,30 +7,75 @@
 from auditlog.registry import auditlog
 from auditlog.models import AuditlogHistoryField
 
+from main.enums import LdProduct
+
 
 class Device(models.Model):
     """
     Device model.
     """
     id = models.CharField(max_length=255, primary_key=True)
     device_name = models.CharField(max_length=255, blank=True, null=True)
-    model = models.CharField(max_length=255, blank=True, null=True)
+    model = models.IntegerField(null=True, blank=True)
     firmware = models.CharField(max_length=255, blank=True)
     btmac_address = models.CharField(max_length=12, null=True, blank=True)
     last_update = models.DateTimeField(null=True, blank=True)
     notes = models.TextField(null=True, blank=True)
     api_key = models.CharField(max_length=64, null=True)
+    auto_number = models.IntegerField(null=True, blank=True)
 
     current_room = models.ForeignKey(Room, related_name='current_devices', null=True, on_delete=models.SET_NULL, blank=True)
     current_organization = models.ForeignKey(Organization, related_name='current_devices', null=True, on_delete=models.SET_NULL, blank=True)
     current_user = models.ForeignKey(CustomUser, null=True, related_name='current_devices', on_delete=models.SET_NULL, blank=True)
     current_campaign = models.ForeignKey(Campaign, null=True, related_name='current_devices', on_delete=models.SET_NULL, blank=True)
 
-    history = AuditlogHistoryField()
+    history = AuditlogHistoryField(pk_indexable=False)
 
+    def save(self, *args, **kwargs):
+        # if the model id is not set or the auto_number is already set we don't
+        # need to update the auto_number
+        if self.model is None:
+            super().save(*args, **kwargs)
+            return
+
+        if self.auto_number:
+            # assign name to update existing devices
+            # TODO could be removed
+            self.device_name = f'{self.get_model_name()} {self.auto_number:04d}'
+            super().save(*args, **kwargs)
+            return
+
+        # update auto_number for the first time
+        with transaction.atomic():
+            counter, _ = ModelCounter.objects.get_or_create(model=self.model)
+            counter.last_auto_number += 1
+            counter.save()
+
+            self.auto_number = counter.last_auto_number
+            '''
+            assigns a unique name for this device in this format: "{model name}{auto_number}"
+            for example "Air Cube 0001"
+            '''
+            self.device_name = f'{self.get_model_name()} {self.auto_number:04d}'
+
+        super().save(*args, **kwargs)
+
+    def get_ble_id(self):
+        # cuts of the 3 last characters that are use for board identification
+        return self.id[:-3]
+
+    def get_model_name(self):
+        '''returns the corresponding LdProduct name'''
+        return LdProduct._names.get(self.model, 'Unknown Model')
+
     def __str__(self):
         return self.id or "Undefined Device"  # Added fallback for undefined IDs
-
+
+
+class ModelCounter(models.Model):
+    model = models.IntegerField(primary_key=True)
+    last_auto_number = models.IntegerField(default=0)
+
 
 class Sensor(models.Model):
     """

app/devices/views.py

@@ -12,8 +12,11 @@
 from django.db import transaction
 
 from .models import Device, DeviceStatus, DeviceLogs, Measurement
+from accounts.models import CustomUser
 from .forms import DeviceForm, DeviceNotesForm
 from main.enums import SensorModel, Dimension
+from organizations.models import Organization
+from campaign.models import Room
 
 class DeviceListView(LoginRequiredMixin, UserPassesTestMixin, ListView):
     model = Device
@@ -64,6 +67,45 @@ def get_context_data(self, **kwargs):
                 if status.battery_soc is not None and status.battery_voltage is not None
             ]
 
+            # query changes
+            organization_changes = device.history.filter(changes__icontains = '"current_organization"').all().order_by('-timestamp')
+            room_changes = device.history.filter(changes__icontains = '"current_room"').all().order_by('-timestamp')
+            user_changes = device.history.filter(changes__icontains = '"current_user"').all().order_by('-timestamp')
+
+            organization_change_log = []
+            room_change_log = []
+            user_change_log = []
+
+            # prepare changes
+            for h in organization_changes:
+                prev = h.changes['current_organization'][0]
+                next = h.changes['current_organization'][1]
+                organization_change_log.append({
+                    'timestamp': h.timestamp,
+                    'prev': None if prev == 'None' else Organization.objects.filter(id=prev).first(),
+                    'next': None if next == 'None' else Organization.objects.filter(id=next).first(),
+                })
+            for h in room_changes:
+                prev = h.changes['current_room'][0]
+                next = h.changes['current_room'][1]
+                room_change_log.append({
+                    'timestamp': h.timestamp,
+                    'prev': None if prev == 'None' else Room.objects.filter(id=prev).first(),
+                    'next': None if next == 'None' else Room.objects.filter(id=next).first(),
+                })
+            for h in user_changes:
+                prev = h.changes['current_user'][0]
+                next = h.changes['current_user'][1]
+                user_change_log.append({
+                    'timestamp': h.timestamp,
+                    'prev': None if prev == 'None' else CustomUser.objects.filter(id=prev).first(),
+                    'next': None if next == 'None' else CustomUser.objects.filter(id=next).first(),
+                })
+
+            context['organization_change_log'] = organization_change_log 
+            context['room_change_log'] = room_change_log
+            context['user_change_log'] = user_change_log
+
             # Serialize data to JSON format
             context['battery_times'] = json.dumps(battery_times, cls=DjangoJSONEncoder)
             context['battery_charges'] = json.dumps(battery_charges, cls=DjangoJSONEncoder)
@@ -101,7 +143,6 @@ def get_context_data(self, **kwargs):
         sensors = defaultdict(list)
         # add available sensors
         for measurement in Measurement.objects.filter(device=device, time_measured=device.last_update).all():
-            print(measurement.sensor_model)
             for value in measurement.values.all():
                 sensors[SensorModel.get_sensor_name(measurement.sensor_model)].append(Dimension.get_name(value.dimension))
 

app/main/util.py

@@ -36,7 +36,6 @@ def get_or_create_station(station_info: dict):
         id = station_info['device']
     )
     if created:
-        station.device_name = station_info['device']
         station.model = station_info['model']
         station.firmware = station_info['firmware']
         station.api_key = station_info['apikey']