Fix observe character in group 500

Closes #25

src/character/models/character.py

@@ -93,7 +93,7 @@ class CharacterQuerySet(models.QuerySet):
             Q(player=user)
             | Q(parties__in=Party.objects.related_to(user))
             | Q(invites__in=Party.objects.related_to(user))
-        )
+        ).distinct()
 
 
 DEFAULT_NOTES = """

src/party/tests/test_interactions.py

@@ -64,3 +64,32 @@ def test_gm_observe_invited_character_in_group(
     ).click()
     title = selenium.find_element(By.TAG_NAME, "h1").text.strip()
     assert title == character.name
+
+
+@pytest.mark.django_db
+def test_gm_observe_invited_character_in_two_groups(
+    selenium: WebDriver, live_server: LiveServer
+):
+    call_command("loaddata", "initial_data")
+
+    username, password = "gm", "password"
+    gm = User.objects.create_user(username, password=password)
+    player = User.objects.create_user("player")
+    party = baker.make(Party, game_master=gm)
+    other_party = baker.make(Party, game_master=gm)
+    character = baker.make(Character, player=player)
+    party.invited_characters.add(character)
+    other_party.invited_characters.add(character)
+
+    selenium.get(live_server.url)
+    login(selenium, username, password)
+
+    selenium.get(live_server.url + reverse("party:list"))
+    selenium.find_element(
+        By.CSS_SELECTOR, f".party[data-id='{party.pk}'] .access"
+    ).click()
+    selenium.find_element(
+        By.CSS_SELECTOR, f".character[data-id='{character.pk}'] .observe"
+    ).click()
+    title = selenium.find_element(By.TAG_NAME, "h1").text.strip()
+    assert title == character.name