Fix

Author: shangyian

datajunction-server/datajunction_server/internal/namespaces.py

@@ -293,8 +293,7 @@ def resolve_git_info_from_map(
         "path": config_ns.git_path,
         "is_default_branch": (
             branch is None  # root namespace — no branch means it IS the default
-            or not default_branch  # no default configured — assume default
-            or branch == default_branch
+            or (default_branch is not None and branch == default_branch)
         ),
         "parent_namespace": branch_ns.parent_namespace if branch_ns else None,
         "git_only": config_ns.git_only,

datajunction-server/tests/internal/git/test_validation.py

@@ -802,11 +802,11 @@ async def test_is_default_branch_true_when_no_git_branch(
         assert result["is_default_branch"] is True
 
     @pytest.mark.asyncio
-    async def test_is_default_branch_true_when_no_default_branch(
+    async def test_is_default_branch_false_when_no_default_branch(
         self,
         session: AsyncSession,
     ):
-        """git_branch set but default_branch is None → defaults to True."""
+        """git_branch set but default_branch is None → is_default_branch is False (unknown)."""
         session.add(
             NodeNamespace(
                 namespace="proj",
@@ -826,7 +826,7 @@ async def test_is_default_branch_true_when_no_default_branch(
         result = await get_git_info_for_namespace(session, "proj.feature_x")
 
         assert result is not None
-        assert result["is_default_branch"] is True
+        assert result["is_default_branch"] is False
 
     # ------------------------------------------------------------------
     # parent_namespace