refactor: Move export into separate app

export/serializers/people.py

@@ -0,0 +1,66 @@
+import typing
+
+from rest_framework import serializers
+
+from people import models
+
+from . import base
+
+
+class PersonSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = models.Person
+        fields = [
+            'pk',
+            'name',
+        ]
+
+
+class PersonExportSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = models.Person
+        fields = [
+            'pk',
+            'name',
+            'core_member',
+            'gender',
+            'age_group',
+            'nationality',
+            'country_of_residence',
+        ]
+
+
+class RelationshipSerializer(base.FlattenedModelSerializer):
+    source = PersonSerializer()
+    target = PersonSerializer()
+
+    class Meta:
+        model = models.Relationship
+        fields = [
+            'pk',
+            'source',
+            'target',
+        ]
+
+    @property
+    def column_headers(self) -> typing.List[str]:
+        headers = super().column_headers
+
+        # Add relationship questions to columns
+        for question in models.RelationshipQuestion.objects.all():
+            headers.append(question.slug)
+
+        return headers
+
+    def to_representation(self, instance):
+        rep = super().to_representation(instance)
+
+        try:
+            # Add relationship question answers to data
+            for answer in instance.current_answers.question_answers.all():
+                rep[answer.question.slug] = answer.slug
+
+        except AttributeError:
+            pass
+
+        return rep