Story OSB-11: Included component error serialization in station test page

LCU/Maintenance/DBInterface/monitoringdb/models/component_error.py

@@ -7,7 +7,8 @@ from .error_details import ErrorDetails
 class ComponentError(models.Model):
     type = models.CharField(max_length=50)
     component = models.ForeignKey(Component, on_delete=models.DO_NOTHING)
-    station_test = models.ForeignKey(StationTest, on_delete=models.DO_NOTHING)
+    station_test = models.ForeignKey(StationTest, on_delete=models.DO_NOTHING,
+                                     related_name='component_errors')
     details = models.ForeignKey(ErrorDetails,
                                 on_delete=models.CASCADE,
                                 related_name='details',

LCU/Maintenance/DBInterface/monitoringdb/serializers/component_error.py

@@ -9,3 +9,7 @@ class ComponentErrorSerializer(NotNullModelSerializer):
         model = ComponentError
         fields = '__all__'
         depth = 2
+
+    def __init__(self, *args, **kwargs):
+        self.Meta.depth = kwargs.pop('depth', 2)
+        super(ComponentErrorSerializer, self).__init__(*args, **kwargs)

LCU/Maintenance/DBInterface/monitoringdb/serializers/station_tests.py

 from rest_framework.serializers import ModelSerializer
 from ..models.station_test import StationTest
+from .component_error import ComponentErrorSerializer
 
 class StationTestSerializer(ModelSerializer):
+    component_errors = ComponentErrorSerializer(many=True, read_only=True, depth=0)
     class Meta:
         model = StationTest
         fields = '__all__'