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AlwaysFailingModel Class — langchain Architecture

Architecture documentation for the AlwaysFailingModel class in test_model_fallback.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  68c6ba69_7e69_3060_9643_1811bb7fc6e1["AlwaysFailingModel"]
  0f829642_e361_67a1_cbca_f82839bbbd31["GenericFakeChatModel"]
  68c6ba69_7e69_3060_9643_1811bb7fc6e1 -->|extends| 0f829642_e361_67a1_cbca_f82839bbbd31
  48aa29b8_65e7_522f_a445_a441eeb6baff["BaseChatModel"]
  68c6ba69_7e69_3060_9643_1811bb7fc6e1 -->|extends| 48aa29b8_65e7_522f_a445_a441eeb6baff
  c6372e75_e4e3_ed20_8230_4be219762f0f["test_model_fallback.py"]
  68c6ba69_7e69_3060_9643_1811bb7fc6e1 -->|defined in| c6372e75_e4e3_ed20_8230_4be219762f0f
  478a87ea_9f11_34e4_9905_c8e2bb1205b7["_generate()"]
  68c6ba69_7e69_3060_9643_1811bb7fc6e1 -->|method| 478a87ea_9f11_34e4_9905_c8e2bb1205b7
  d8a69a73_8673_5d08_990a_6d51af074867["__init__()"]
  68c6ba69_7e69_3060_9643_1811bb7fc6e1 -->|method| d8a69a73_8673_5d08_990a_6d51af074867
  92c842b5_48e2_a6c6_0020_0cc898b56e41["_llm_type()"]
  68c6ba69_7e69_3060_9643_1811bb7fc6e1 -->|method| 92c842b5_48e2_a6c6_0020_0cc898b56e41

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_model_fallback.py lines 133–143

    class AlwaysFailingModel(GenericFakeChatModel):
        @override
        def _generate(
            self,
            messages: list[BaseMessage],
            stop: list[str] | None = None,
            run_manager: CallbackManagerForLLMRun | None = None,
            **kwargs: Any,
        ) -> ChatResult:
            msg = "Model failed"
            raise ValueError(msg)

Defined In

Extends

Source

Frequently Asked Questions

What is the AlwaysFailingModel class?
AlwaysFailingModel is a class in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_model_fallback.py.
Where is AlwaysFailingModel defined?
AlwaysFailingModel is defined in libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_model_fallback.py at line 133.
What does AlwaysFailingModel extend?
AlwaysFailingModel extends GenericFakeChatModel, BaseChatModel.

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