AssociatedMedia has a field for type and a field for the URL rather than having one URL field per type

src/pardner/services/groupme.py

@@ -302,7 +302,9 @@ def parse_conversation_group_vertical(
         associated_media = []
         image_url = raw_data_dict.get('image_url', None)
         if image_url:
-            associated_media = [AssociatedMediaSubVertical(image_url=image_url)]
+            associated_media = [
+                AssociatedMediaSubVertical(media_type='image', url=image_url)
+            ]
 
         is_private = None
         conversation_type = raw_data_dict.get('type')

src/pardner/services/strava.py

@@ -112,7 +112,7 @@ def parse_social_posting_vertical(
                 raw_data_dict['photos'].get('primary', {}).get('urls', {}).values()
             )
             associated_media_list = [
-                AssociatedMediaSubVertical(image_url=photo_url)
+                AssociatedMediaSubVertical(media_type='image', url=photo_url)
                 for photo_url in photo_urls
             ]
 

src/pardner/verticals/sub_verticals/associated_media.py

@@ -1,11 +1,16 @@
-from pydantic import AnyHttpUrl
+from typing import Literal
+
+from pydantic import AnyHttpUrl, Field
 
 from pardner.verticals.sub_verticals.base import BaseSubVertical
 
 
 class AssociatedMediaSubVertical(BaseSubVertical):
     """Holds the URL for the media attached to a parent vertical."""
 
-    audio_url: AnyHttpUrl | None = None
-    image_url: AnyHttpUrl | None = None
-    video_url: AnyHttpUrl | None = None
+    media_type: Literal['audio', 'image', 'video'] | None = Field(
+        description='If media type is unknown or not one of the types defined in this '
+        'field, value is None.',
+        default=None,
+    )
+    url: AnyHttpUrl | None = None

tests/test_transfer_services/test_groupme.py

@@ -437,9 +437,8 @@ def test_fetch_conversation_group_vertical(groupme_transfer_service, mocker):
             'created_at': datetime(2011, 4, 12, 15, 48, 48, tzinfo=timezone.utc),
             'associated_media': [
                 {
-                    'audio_url': None,
-                    'image_url': AnyHttpUrl('https://i.groupme.com/123456789'),
-                    'video_url': None,
+                    'media_type': 'image',
+                    'url': AnyHttpUrl('https://i.groupme.com/123456789'),
                 }
             ],
             'is_private': True,

tests/test_transfer_services/test_strava.py

@@ -204,16 +204,8 @@ def test_fetch_physical_activity_vertical(mocker, strava_transfer_service):
             'created_at': datetime.datetime(2018, 5, 2, 12, 15, 9),
             'url': AnyHttpUrl('https://www.strava.com/activities/154504250376823'),
             'associated_media': [
-                {
-                    'audio_url': None,
-                    'image_url': AnyHttpUrl('https://url1.com/'),
-                    'video_url': None,
-                },
-                {
-                    'audio_url': None,
-                    'image_url': AnyHttpUrl('https://url2.com/'),
-                    'video_url': None,
-                },
+                {'media_type': 'image', 'url': AnyHttpUrl('https://url1.com/')},
+                {'media_type': 'image', 'url': AnyHttpUrl('https://url2.com/')},
             ],
             'status': 'restricted',
             'text': 'mock description',