{"record":{"id":"7f354654c7034be1","repo":"mem0ai/mem0","slug":"the-langchain-community-library-is-required-ple","errorCode":null,"errorMessage":"The 'langchain_community' library is required. Please install it using 'pip install langchain_community'.","messagePattern":"The 'langchain_community' library is required\\. Please install it using 'pip install langchain_community'\\.","errorType":"exception","errorClass":"ImportError","httpStatus":null,"severity":"error","filePath":"mem0/configs/vector_stores/langchain.py","lineNumber":10,"sourceCode":"from typing import Any, ClassVar, Dict\n\nfrom pydantic import BaseModel, ConfigDict, Field, model_validator\n\n\nclass LangchainConfig(BaseModel):\n    try:\n        from langchain_community.vectorstores import VectorStore\n    except ImportError:\n        raise ImportError(\n            \"The 'langchain_community' library is required. Please install it using 'pip install langchain_community'.\"\n        )\n    VectorStore: ClassVar[type] = VectorStore\n\n    client: VectorStore = Field(description=\"Existing VectorStore instance\")\n    collection_name: str = Field(\"mem0\", description=\"Name of the collection to use\")\n\n    @model_validator(mode=\"before\")\n    @classmethod\n    def validate_extra_fields(cls, values: Dict[str, Any]) -> Dict[str, Any]:\n        allowed_fields = set(cls.model_fields.keys())\n        input_fields = set(values.keys())\n        extra_fields = input_fields - allowed_fields\n        if extra_fields:\n            raise ValueError(\n                f\"Extra fields not allowed: {', '.join(extra_fields)}. Please input only the following fields: {', '.join(allowed_fields)}\"\n            )\n        return values","sourceCodeStart":1,"sourceCodeEnd":28,"githubUrl":"https://github.com/mem0ai/mem0/blob/001c235229be8795e3834520467bd0d661ed8f34/mem0/configs/vector_stores/langchain.py#L1-L28","documentation":"Error \"The 'langchain_community' library is required. Please install it using 'pip install langchain_community'.\" thrown in mem0ai/mem0.","triggerScenarios":"Thrown at mem0/configs/vector_stores/langchain.py:10 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Install the dependency: pip install langchain_community."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"001c235229be8795e3834520467bd0d661ed8f34","analyzedAt":"2026-08-15T01:55:42.685Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}