fix(relink): keep sha untouched during relinking

py/services/metadata_sync_service.py

@@ -344,15 +344,6 @@ class MetadataSyncService:
                 + (f" with version: {model_version_id}" if model_version_id else "")
             )
 
-        primary_model_file: Optional[Dict[str, Any]] = None
-        for file_info in civitai_metadata.get("files", []):
-            if file_info.get("primary", False) and file_info.get("type") == "Model":
-                primary_model_file = file_info
-                break
-
-        if primary_model_file and primary_model_file.get("hashes", {}).get("SHA256"):
-            metadata["sha256"] = primary_model_file["hashes"]["SHA256"].lower()
-
         metadata_path = os.path.splitext(file_path)[0] + ".metadata.json"
         await self.update_model_metadata(
             metadata_path,

tests/services/test_metadata_sync_service.py

@@ -373,7 +373,7 @@ async def test_fetch_and_update_model_returns_rate_limit_error(tmp_path):
 
 
 @pytest.mark.asyncio
-async def test_relink_metadata_fetches_version_and_updates_sha(tmp_path):
+async def test_relink_metadata_fetches_version_without_overwriting_sha(tmp_path):
     provider = SimpleNamespace(
         get_model_by_hash=AsyncMock(),
         get_model_version=AsyncMock(
@@ -393,7 +393,7 @@ async def test_relink_metadata_fetches_version_and_updates_sha(tmp_path):
 
     helpers = build_service(default_provider=provider)
 
-    metadata = {"model_name": "Local"}
+    metadata = {"model_name": "Local", "sha256": "original"}
     result = await helpers.service.relink_metadata(
         file_path=str(tmp_path / "model.safetensors"),
         metadata=metadata,
@@ -401,7 +401,8 @@ async def test_relink_metadata_fetches_version_and_updates_sha(tmp_path):
         model_version_id=2,
     )
 
-    assert result["sha256"] == "abcdef"
+    assert result["model_name"] == "Remote"
+    assert result["sha256"] == "original"
     helpers.metadata_manager.save_metadata.assert_awaited_once()