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fix(models): handle google provider import errors and add dependency (#952)

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* fix(models): improve provider import guidance and add google provider dep

* Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* fix(reflection): prefer provider install hint on transitive import errors

---------

Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
Xinmin Zeng
2026-03-03 14:56:54 +08:00
committed by GitHub
parent 7754c49217
commit 8342e88534
7 changed files with 191 additions and 1 deletions
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32
backend/src/reflection/resolvers.py
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@@ -1,5 +1,29 @@
from importlib import import_module
MODULE_TO_PACKAGE_HINTS = {
"langchain_google_genai": "langchain-google-genai",
"langchain_anthropic": "langchain-anthropic",
"langchain_openai": "langchain-openai",
"langchain_deepseek": "langchain-deepseek",
}
def _build_missing_dependency_hint(module_path: str, err: ImportError) -> str:
"""Build an actionable hint when module import fails."""
module_root = module_path.split(".", 1)[0]
missing_module = getattr(err, "name", None) or module_root
# Prefer provider package hints for known integrations, even when the import
# error is triggered by a transitive dependency (e.g. `google`).
package_name = MODULE_TO_PACKAGE_HINTS.get(module_root)
if package_name is None:
package_name = MODULE_TO_PACKAGE_HINTS.get(missing_module, missing_module.replace("_", "-"))
return (
f"Missing dependency '{missing_module}'. "
f"Install it with `uv add {package_name}` (or `pip install {package_name}`), then restart DeerFlow."
)
def resolve_variable[T](
variable_path: str,
@@ -27,7 +51,13 @@ def resolve_variable[T](
try:
module = import_module(module_path)
except ImportError as err:
raise ImportError(f"Could not import module {module_path}") from err
module_root = module_path.split(".", 1)[0]
err_name = getattr(err, "name", None)
if isinstance(err, ModuleNotFoundError) or err_name == module_root:
hint = _build_missing_dependency_hint(module_path, err)
raise ImportError(f"Could not import module {module_path}. {hint}") from err
# Preserve the original ImportError message for non-missing-module failures.
raise ImportError(f"Error importing module {module_path}: {err}") from err
try:
variable = getattr(module, variable_name)