fix: increase OAuth token column length to 4096

fastapi_users_db_sqlalchemy/__init__.py

@@ -69,10 +69,10 @@ class SQLAlchemyBaseOAuthAccountTable(Generic[ID]):
         oauth_name: Mapped[str] = mapped_column(
             String(length=100), index=True, nullable=False
         )
-        access_token: Mapped[str] = mapped_column(String(length=1024), nullable=False)
+        access_token: Mapped[str] = mapped_column(String(length=4096), nullable=False)
         expires_at: Mapped[Optional[int]] = mapped_column(Integer, nullable=True)
         refresh_token: Mapped[Optional[str]] = mapped_column(
-            String(length=1024), nullable=True
+            String(length=4096), nullable=True
         )
         account_id: Mapped[str] = mapped_column(
             String(length=320), index=True, nullable=False

tests/test_users.py

@@ -219,3 +219,31 @@ async def test_queries_oauth(
         "foo", "bar"
     )
     assert unknown_oauth_user is None
+
+
+@pytest.mark.asyncio
+async def test_oauth_long_access_token_roundtrip(
+    sqlalchemy_user_db_oauth: SQLAlchemyUserDatabase[UserOAuth, UUID_ID],
+):
+    """A long (>1024 characters) OAuth access_token should round-trip without truncation."""
+    user_create = {
+        "email": "lancelot@camelot.bt",
+        "hashed_password": "guinevere",
+    }
+
+    user = await sqlalchemy_user_db_oauth.create(user_create)
+    long_access_token = "a" * 2048
+    oauth_account = {
+        "oauth_name": "service1",
+        "access_token": long_access_token,
+        "expires_at": 1579000751,
+        "account_id": "user_oauth_long",
+        "account_email": "king.arthur@camelot.bt",
+    }
+
+    user = await sqlalchemy_user_db_oauth.add_oauth_account(user, oauth_account)
+    assert user.oauth_accounts[0].access_token == long_access_token
+
+    fetched_user = await sqlalchemy_user_db_oauth.get(user.id)
+    assert fetched_user is not None
+    assert fetched_user.oauth_accounts[0].access_token == long_access_token