Alter SensorDataValue Field "value" (#11)

* alter value field from textfield to decimalfield

* updae test to test against decimal value

* update migration files

feinstaub/sensors/migrations/0021_auto_20190122_0917.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.18 on 2019-01-22 09:17
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('sensors', '0020_auto_20190122_0600'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='sensordatavalue',
+            name='value',
+            field=models.DecimalField(blank=True, decimal_places=11, max_digits=14, null=True),
+        ),
+    ]

feinstaub/sensors/models.py

@@ -123,7 +123,7 @@ def __str__(self):
 class SensorDataValue(TimeStampedModel):
 
     sensordata = models.ForeignKey(SensorData, related_name='sensordatavalues')
-    value = models.TextField(db_index=True)
+    value = models.DecimalField(max_digits=14, decimal_places=11, null=True, blank=True)
     value_type = models.CharField(max_length=100, choices=SENSOR_TYPE_CHOICES,
                                   db_index=True)
 

feinstaub/tests/test_full_push.py

@@ -39,9 +39,9 @@ def test_full_data_push(self, sensor, data_fixture):
 
         assert sd.sensordatavalues.count() == 2
         assert sd.sensordatavalues.get(value_type="P1").value ==\
-            str(data_fixture['sensordatavalues'][0]['value'])
+            data_fixture['sensordatavalues'][0]['value']
         assert sd.sensordatavalues.get(value_type="P2").value ==\
-            str(data_fixture['sensordatavalues'][1]['value'])
+            data_fixture['sensordatavalues'][1]['value']
 
         assert sd.location == sensor.node.location