django: Adapt to the new database model

- Rewrite the serializer for single and multi resource
- Adapt admin dashboard
- Remove listView for now, admin dashboard is sufficient for testing
  currently

Signed-off-by: Jonas Remmert <jremmert@gmx.net>

server/django/sensordata/admin.py

@@ -1,3 +1,51 @@
 from django.contrib import admin
+from .models import (
+    Device,
+    ResourceType,
+    Resource,
+    Event,
+    EventResource,
+    DeviceOperation,
+    Firmware
+)
 
-# Register your models here.
+@admin.register(Device)
+class DeviceAdmin(admin.ModelAdmin):
+    list_display = ('device_id', 'name')
+    search_fields = ('device_id', 'name')
+
+@admin.register(ResourceType)
+class ResourceTypeAdmin(admin.ModelAdmin):
+    list_display = ('object_id', 'resource_id', 'name', 'data_type')
+    search_fields = ('object_id', 'resource_id', 'name')
+
+@admin.register(Resource)
+class ResourceAdmin(admin.ModelAdmin):
+    list_display = ('device', 'resource_type', 'timestamp')
+    search_fields = ('device__device_id', 'resource_type__name')
+    list_filter = ('device', 'resource_type', 'timestamp')
+
+@admin.register(Event)
+class EventAdmin(admin.ModelAdmin):
+    list_display = ('device', 'event_type', 'start_time', 'end_time')
+    search_fields = ('device__device_id', 'event_type')
+    list_filter = ('device', 'event_type')
+
+@admin.register(EventResource)
+class EventResourceAdmin(admin.ModelAdmin):
+    list_display = ('event', 'resource')
+    search_fields = ('event__event_type', 'resource__resource_type__name')
+    list_filter = ('event', 'resource')
+
+@admin.register(DeviceOperation)
+class DeviceOperationAdmin(admin.ModelAdmin):
+    list_display = ('resource', 'operation_type', 'status', 'timestamp_sent',
+                    'retransmit_counter', 'last_attempt')
+    search_fields = ('resource__device__device_id', 'operation_type', 'status')
+    list_filter = ('resource', 'operation_type', 'status', 'timestamp_sent')
+
+@admin.register(Firmware)
+class FirmwareAdmin(admin.ModelAdmin):
+    list_display = ('version', 'file_name', 'download_url', 'created_at')
+    search_fields = ('version', 'file_name')
+    list_filter = ('created_at',)

server/django/sensordata/lwm2m_mappings.py

@@ -0,0 +1,23 @@
+LWM2M_RESOURCE_MAP = {
+    (3303, 5700): {"name": "temperature", "data_type": "float"},
+    (3303, 5701): {"name": "humidity", "data_type": "float"},
+    (3, 0): {"name": "manufacturer", "data_type": "string"},
+    (3, 1): {"name": "model_number", "data_type": "string"},
+    (3, 2): {"name": "serial_number", "data_type": "string"},
+    (3, 3): {"name": "firmware_version", "data_type": "string"},
+    (3, 6): {"name": "power_source", "data_type": "int"},
+    (3, 7): {"name": "power_source_v", "data_type": "int"},
+    (3, 8): {"name": "power_source_i", "data_type": "int"},
+    (3, 9): {"name": "battery_level", "data_type": "int"},
+    (3, 10): {"name": "memory_free", "data_type": "int"},
+    (3, 11): {"name": "error_code", "data_type": "int"},
+    (3, 13): {"name": "current_time", "data_type": "time"},
+    (3, 14): {"name": "utc_offset", "data_type": "string"},
+    (3, 15): {"name": "timezone", "data_type": "string"},
+    (3, 16): {"name": "binding_mode", "data_type": "string"},
+    (3, 17): {"name": "device_type", "data_type": "string"},
+    (3, 18): {"name": "hardware_version", "data_type": "string"},
+    (3, 19): {"name": "software_version", "data_type": "string"},
+    (3, 20): {"name": "battery_status", "data_type": "int"},
+    (3, 21): {"name": "memory_total", "data_type": "int"},
+}

server/django/sensordata/models.py

@@ -1,4 +1,3 @@
-from django.contrib import admin
 from django.db import models
 
 class Device(models.Model):
@@ -16,6 +15,9 @@ class ResourceType(models.Model):
     class Meta:
         unique_together = ('object_id', 'resource_id')
 
+    def __str__(self):
+        return f"{self.object_id}/{self.resource_id} - {self.name}"
+
 class Resource(models.Model):
     """Stores individual resource data, such as sensor readings, from a device."""
     device = models.ForeignKey(Device, on_delete=models.PROTECT)
@@ -29,6 +31,9 @@ class Resource(models.Model):
     class Meta:
         unique_together = ('device', 'resource_type', 'timestamp')
 
+    def __str__(self):
+        return f"{self.device} - {self.resource_type} - {self.timestamp}"
+
 class Event(models.Model):
     """
     Represents a significant event in the system that is associated with a
@@ -65,38 +70,3 @@ class Firmware(models.Model):
     file_name = models.CharField(max_length=255)
     download_url = models.URLField()
     created_at = models.DateTimeField(auto_now_add=True)
-
-#class Endpoint(models.Model):
-#    endpoint = models.CharField(max_length=100, default='', unique=True)
-#    manufacturer = models.CharField(max_length=100, default='')
-#    model_number = models.CharField(max_length=100, default='')
-#    serial_number = models.CharField(max_length=100, default='')
-#    firmware_version = models.CharField(max_length=100, default='')
-#    reboot = models.IntegerField(default=0)
-#    factory_reset = models.IntegerField(default=0)
-#    battery_level = models.IntegerField(default=0)
-#    last_updated = models.DateTimeField(auto_now=True)
-#
-#class SensorData(models.Model):
-#    endpoint = models.CharField(max_length=100, default='')
-#    time = models.DateTimeField(auto_now_add=True)
-#    temperature = models.FloatField()
-#
-#@admin.register(SensorData)
-#class SensorDataAdmin(admin.ModelAdmin):
-#    list_display = [
-#        'time',
-#        'endpoint',
-#        'temperature',
-#    ]
-#
-#@admin.register(Endpoint)
-#class EndpointAdmin(admin.ModelAdmin):
-#    list_display = [
-#        'endpoint',
-#        'serial_number',
-#        'model_number',
-#        'firmware_version',
-#        'reboot',
-#        'last_updated',
-#    ]